Alright here is a question i always wondered about, why are galaxies are mostly shaped in a 2 dimensional circular shape?? why can't a galaxy be shaped like a sphere??
@klesstwo Matter has angular momentum and it has to do with the conservation of angular momentum (such conservation plays a role in protoplanetary disks, accretion disks, planetary rings, etc.). The matter rotates in a particular direction and gravity pulls any matter above or below the plane of rotation into the plane. Unless it can overcome the gravity (if it has enough energy), it will remain within it forming the disk shapes you observe.
@klesstwo Elliptical galaxy's are shaped like spheres, it all depends on gravity and rotation, the size of black holes in elliptical galaxy's is terrifying.
@klesstwo Imagine an Italian pizza chef tossing a ball of dough up in the air while spinning it... the dough flattens out into a flat circular shape. Same thing with galaxies, the centrifugal force would spread the sphere of stars out into a flat pancake shape.
What if the time was slowing down the closer you get to the center of the galaxy? The supermassive black hole in the middle of the galaxy could be causing this... just an idea
@Typho0n86 If what I've been reading up on on various websites is (or is it are?) to be believed, then it is possible if not likely that a black hole can and does distort time itself.
Could the spiral arms be caused by the framedrag of the supermassive blackhole in the center of the galaxy? It would be a sort of gravity vortex wave. Like Lagrange points but elongated and distorted, causing matter to fall into the arms, and be dragged around at the same angular speed. Does that make sense at all?
how do you know that the spiral is onedimensional? It's more like into looking into cylinder - the converging point is just an illusion - at this point the diameter is equal to the diameter which seems larger in this picture. And now flatlander ... do your work.
This may be a silly question but you say that all of the stars are traveling around at the same speed. As a galaxy is thought to have a black hole at the centre doesn't that mean that the stars are orbiting? And if they are orbiting doesn't that mean that their distance from the gravitational centre and their velocity are linked according to Newton's laws? I thought that the stars further out had to be moving faster, otherwise they would be compelled to fall in towards a lower orbit.
@ianbcnp at those speeds and gravitation levels, general relativity takes place. and it's not a "simple" system. a man can calculate a binary system, computers can calculate (lets say) 10 stars. here you have billions. and i doubt that you can reduce the system to the "superposition" of gravity (like you refer to a star as a singular point in it's center that holds all the mass).
dudes like you cannot even explain why factorials are being used - saves writing. all the "higher mathematics" just saves some writing so that more and more complex things can be described
by using the same or even less space than before. it's simple compression - just like to compress the .wav pattern into the .mp3 pattern.
When we say that all of the stars are moving at the same speed, are we saying they have the same orbital speed, or are we saying they have the same angular speed? The runner analogy alludes to the same orbital speed, but later in the video he refers to the rotation of the galaxy and its angular speed, as though the galaxy rotates like a rigid disk.
The reason for vendettas or even bigger ones called "wars" is by the same. Each of the ants does what the other does - the enemy does what his enemy does. They sniff on each others arse - if sniffing with their "olfactorial", the "visual" or any other sense is negligible.
By the way: why not measuring time on any degree of the scale dimension by using 10, 100 or 1000. We say 1/10 of a second, in industry they use 100 minutes rather than 60 minutes.
so let me get this straight - the arms are soundwaves (waves in the density distribution of the particles) in the galactic gas/ dust? That's a very cool idea, because of how simple it is. But what makes the waves move in circles? or is it just superposition of a rotating wave source? i mean - do the waves travel in a straight line even though it looks spiral. or do the waves actually move in a circular motion?
Do the Universe have a coriolis effect ? - That is does the relative rotational directions of galaxies tell us anything about the structure / topology of the universe ? Is there a tendancy to rotate one way 'over here' and the opposite 'over there' ? Is it random / 50-50 chance ? What is the reason that a particular galaxy formed rotating the way it did i guess is the deeper question ?
@Hythloday71 This is a good question, I hope someone who knows there stuff can give an answer. Indeed, has there been a study into the distribution of the rotations of these galaxies? I'm guessing it's likely that they seem rather randomly distributed in that sense.
Considering the fact that the Earth is orbiting the Sun at an incredible speed in addition to the fact that our galaxy is moving around at an incredible speed, would life on Earth be a lot shorter if this were not the case since time is relative to speed?
The video shows an image of the supernova "of summer 2011" in the "Whirlpool Galaxy" M51. It was brightest around June 20, and could already be discerned in a telescope with a mirror/lens of 5-inches in diameter back then. It's brightness has dropped since then, but it can still be easily seen in a 10-inch telescope - provided you observe in dark skies.
From my knowledge the arms are created due to the rate at which material is ejected from the nucleus of the galaxy. The system rotates at a fixed velocity but the rate at which matter is projected(your waves I guess) is erratic.
6:15 Doesn't relativity say that it doesn't really matter, that true you could argue we were standing still and the arms are sweeping through us, or the arms are standing still and we're sweeping through them? So it doesn't really matter and the answer to the question is both? Correct me if i'm wrong..
Science can be really fun sometimes, when they say things like, "We don't really know why it works this way, so we're going to make an educated guess and assume it works some other way, then all nod our heads as if we believe it."
The most fun bit is that theories and ideas are often presented as fact, instead of being presented as just theories and ideas.
@theverbalrelease No, a theory explains a fact, it can not be a fact or an idea. That's how it works. A theory can make predictions about the fact. If the prediction fails then the theory is thrown out or revised. Look it up because a Scientific Theory and a "theory" are two very different things. Here is a good example of a theory: The fact of biological evolution is best explained by the Theory of Evolution.
@theverbalrelease By calling them "theories", you are trying to imply that they do not have evidence - proof - to back them up. That is false and intentionally misleading.
@culwin If something has evidence, but not enough evidence to prove the theory, it is still a theory, especially considering sometimes even though there may be some evidence, it might exists for reasons outside of the theory. Only when something is proved does it stop being a theory.
@theverbalrelease That is not the only meaning of the word "theory", and I think you know it. Troll harder.
1.
a coherent group of general propositions used as principles of explanation for a class of phenomena: Einstein's theory of relativity.
2.
a proposed explanation whose status is still conjectural, in contrast to well-established propositions that are regarded as reporting matters of actual fact.
@culwin At its base, there is theory and fact. Before an idea is proven, it is theory. Once it is proven, it is fact. It's really quite simple. Have a nice day :).
@theverbalrelease In Science a theory is there to explain the facts and provide us a model. So a theory in science is just as important if not more so than fact.
@mykmmc Space is not a vacuum so there is sound in space. The waves you see in this video ARE sound. However the wavelength of sound in space is very big, so you cant hear it unless it is being compressed by a computer. :)
Well, it's an imperfect vacuum. There is quite a lot of material to be found in any given region of space, but no, it shouldn't be enough to carry things like sound waves, regardless of wavelength. The particles of matter are separated by far to much empty space to carry a coherent wave.
@InB4Desu Yes, space does carry sound. Watch the video your commenting on again.
It explains how sound waves of very large wavelengths move around the galaxy in certain patterns and create those spiral arms and even tho the galaxy looks pretty dense from far away, think about all that "empty" space between the stars and planets - it does carry the wave.
@culwin He says the wave moving around the galaxy is a wave of density. And what are waves of density usually called? Sound. In this particular example: Infrasound. Why do you try to correct other people if you have no idea what you're even talking about? You should've learned that in school.
@volound Space cant be a vacuum (meaning that there is ABSOLUTELY nothing in it), because WE are in it, even if you only mean that "black stuff" all around us, there are still a couple of hydrogen or helium atoms in it.
@V3N0MousProductions the pictures of the "milky way" we have are from the inside out, only a part of the milky way galaxy. We can't take pictures of it in it's entirety from here
He made that comment because it implies that star formation takes place almost exclusively in the spiral arms. But again, that is not what I am looking for.
No, he was talking about massive stars when talking about the supernovae; those stars live only a few tens of millions of years, and that was his point: those stars essentially die where they form and thus where there are supernovae, there is star formation.
@fegolem I asked this also, with no replies. According to NASA and contemporary belief we are in a Local Interstellar Cloud, also according to NASA & some Russian astronomer we are now entering a denser area of the Interstellar cloud that is affecting the Sun's magnetosphere. I would like to know if the denser area is the centre of the Wave/Arm?
@sixtysymbols I had made a video repost (i personally made the video) and the research i put inside of the video and information section of the video is specifically a question i have for this professor, please accept my video response and don't be fooled by its title, I'm not talking about a man in the sky but Thales-Einsteins Spinoza's God and Golden-Ratio Spiral Phi Vortex Structures etc
Anyone else see the 'Atlas of Creation' book on the shelf. I laughed. It would be more appropriate to use it as a door stop than to display that trash on a shelf.
How does NASA get pictures of the Milky Way? How is it that we could see its full structure even though our most powerful telescopes are circling earth? Can anyone explain
some galaxies are spiral and some not, if the rotation of a galxy takes hounderts tousends years then u can not tell that the galaxy always was spiral, yo are watching one galaxy not more then about houndert years, like you gave the example whit the runers around the football field, maybe the galaxy is gona lose the spirals after some time just in larger skale? or why the other galaxies do not have spirals?
hey proff, what do u think of white holes? recently ive been looking at the theory of it, Einstein's theory says its possible but not stable for long periods of time...we used to see black holes the same way we see the white hole (a mythological creature pretty much), but what do u think of it?
@XxhilfmirxX For goodness sake, tell me where in Einstein's theory does it say that black holes (or even a white hole) are possible??! I'd pay you good money if you showed me. Please stop lying or tell that to whoever lied to you, thank you.
pythagoras / keplars Music-harmony of the spheres explains alot of this, Walter Russell has explained ALL of this (If only academia would take notice of him)
Degrees per second! Hahah! Are pattern rates based on comparisons with the earliest photographs of galaxies? How far back does the evidence you are using go?
I always wondered what is in the center of a galaxy it looks like a giant sun but it could be a bunch of stars in a short distance. I want to know what it is someone please tell me.
@ravenheart93 I think the theory is that at the center of a galaxy is a ridiculously massive black hole with millions of stars orbiting around it at relative close range. But there's probably a lot more to it.
Perhaps in the grand scheme of things spiral galaxies aren't that old and so they still have their spiral patterns, but will deform in a few billion more years. Just a thought.
@Mojosbigstick my friend did astrophysics, thought it was like this and then realised he was just studying various branches of how light works and what you can glean from it. personally it sounds quite interesting to me though.
What if the Supernova was caused by a giant stable star entering the Wave, where critical mass was induced by the energy in the wave and caused the Supernova?
Is the Interstellar Energy Cloud(Alexei Dmitriev) we are now entering, with more density than the local interstellar cloud one of these arms/wave? What effect would travelling into the wave have on our Solar System? Obviously the arms are created by the Black Holes gravity as water going down a plug hole!
this is scary, in a few years human race will know so much about the world that they may get to meet the aliens in control of the milky way, if we know too much about the universe, then we will have to consult with the head of the milky way before we do anything, its probably the grey aliens. we're growing up as earthly creachures
heh, I just found the wiki and the density wave theory seems to be like 50 years old! Good animations in that wiki to understand how the stars move between the arms.
@sixtysymbols I thought given two objects you couldn't determine which of the two is 'stationary' and which is moving, only define which is stationary
Thanks Brady and Prof Merrifield! I had to watch that twice as I found the wave concept, as applied here, difficult, but think I understand now, thanks to the last bit about the wave often travelling independently to the stars. For me it just raises more questions, but thats par for science. off to extra footage time :)
@FinTheDew There are many spiral galaxies that resemble our own, of course none are an exact replica but agree it is cool to see others from a different angle. We can more easily imagine what our own looks like from a distance. I enjoy looking at the various images of spiral galaxy collisions at different stages - it is kind of cool to be able to "see" the whole process at different stages and imagine our position when Andomeda passes through the Milky Way in a few billion years.
Do spiral disks behave like accretion disks?
stardude692001 2 weeks ago
Here's my theory:
the arms are orbiting around the center of the galaxy
at the center of the galaxy is a black hole
things orbiting the galaxy are slowly being sucked in to the black hole
aljirvine 3 weeks ago in playlist Astronomy from Sixty Symbols
@aljirvine That is not a theory, that is just repeating what you've been told since childhood
UncleKennybobs 2 weeks ago
I have never heard of the density wave before.
Does George Bush know about this?
UncleKennybobs 1 month ago
@UncleKennybobs No but Palin can see one from her house.
masluxx 2 weeks ago
Alright here is a question i always wondered about, why are galaxies are mostly shaped in a 2 dimensional circular shape?? why can't a galaxy be shaped like a sphere??
klesstwo 4 months ago 9
@klesstwo Matter has angular momentum and it has to do with the conservation of angular momentum (such conservation plays a role in protoplanetary disks, accretion disks, planetary rings, etc.). The matter rotates in a particular direction and gravity pulls any matter above or below the plane of rotation into the plane. Unless it can overcome the gravity (if it has enough energy), it will remain within it forming the disk shapes you observe.
fpgt91 2 months ago
@klesstwo Elliptical galaxy's are shaped like spheres, it all depends on gravity and rotation, the size of black holes in elliptical galaxy's is terrifying.
TheHemsworthboy 1 month ago in playlist Astronomy from Sixty Symbols 6
@klesstwo Sixtysymbols has done this before
/watch?v=V6ZPpC_lyYw 6:01
TheDingiso 1 month ago
@klesstwo Imagine an Italian pizza chef tossing a ball of dough up in the air while spinning it... the dough flattens out into a flat circular shape. Same thing with galaxies, the centrifugal force would spread the sphere of stars out into a flat pancake shape.
tapelegs 1 week ago
@klesstwo conservation of angular momentum.
Sixty symbols explains this in another video watch?v=V6ZPpC_lyYw.
Trisscarro 1 week ago
This has been flagged as spam show
I want your guy's job!
therealitybeforeyou 4 months ago in playlist More videos from sixtysymbols
Wait, so we actually don't really see most of the stars in a galaxy, but only those that are "lit up"?
dumbzebra 5 months ago
What if the time was slowing down the closer you get to the center of the galaxy? The supermassive black hole in the middle of the galaxy could be causing this... just an idea
Typho0n86 6 months ago
@Typho0n86 If what I've been reading up on on various websites is (or is it are?) to be believed, then it is possible if not likely that a black hole can and does distort time itself.
Treefyleaf 6 months ago
@Treefyleaf It's called time dilation. It's not "likely", it special relativity.
lexagon 6 months ago
Press 6 for a chode wank
MatthewLadle42 7 months ago
Press 3 and repeat for a wank affect:P
MatthewLadle42 7 months ago
Could the spiral arms be caused by the framedrag of the supermassive blackhole in the center of the galaxy? It would be a sort of gravity vortex wave. Like Lagrange points but elongated and distorted, causing matter to fall into the arms, and be dragged around at the same angular speed. Does that make sense at all?
shadeydave 7 months ago
how do you know that the spiral is onedimensional? It's more like into looking into cylinder - the converging point is just an illusion - at this point the diameter is equal to the diameter which seems larger in this picture. And now flatlander ... do your work.
vertexgo 7 months ago
This may be a silly question but you say that all of the stars are traveling around at the same speed. As a galaxy is thought to have a black hole at the centre doesn't that mean that the stars are orbiting? And if they are orbiting doesn't that mean that their distance from the gravitational centre and their velocity are linked according to Newton's laws? I thought that the stars further out had to be moving faster, otherwise they would be compelled to fall in towards a lower orbit.
ianbcnp 7 months ago
@ianbcnp at those speeds and gravitation levels, general relativity takes place. and it's not a "simple" system. a man can calculate a binary system, computers can calculate (lets say) 10 stars. here you have billions. and i doubt that you can reduce the system to the "superposition" of gravity (like you refer to a star as a singular point in it's center that holds all the mass).
kidi1232 7 months ago
dudes like you cannot even explain why factorials are being used - saves writing. all the "higher mathematics" just saves some writing so that more and more complex things can be described
by using the same or even less space than before. it's simple compression - just like to compress the .wav pattern into the .mp3 pattern.
vertexgo 7 months ago
When we say that all of the stars are moving at the same speed, are we saying they have the same orbital speed, or are we saying they have the same angular speed? The runner analogy alludes to the same orbital speed, but later in the video he refers to the rotation of the galaxy and its angular speed, as though the galaxy rotates like a rigid disk.
So which is it?
sd19791 7 months ago
/watch?v=mA37cb10WMU
The reason for vendettas or even bigger ones called "wars" is by the same. Each of the ants does what the other does - the enemy does what his enemy does. They sniff on each others arse - if sniffing with their "olfactorial", the "visual" or any other sense is negligible.
By the way: why not measuring time on any degree of the scale dimension by using 10, 100 or 1000. We say 1/10 of a second, in industry they use 100 minutes rather than 60 minutes.
vertexgo 7 months ago
Very interesting, thx.
so let me get this straight - the arms are soundwaves (waves in the density distribution of the particles) in the galactic gas/ dust? That's a very cool idea, because of how simple it is. But what makes the waves move in circles? or is it just superposition of a rotating wave source? i mean - do the waves travel in a straight line even though it looks spiral. or do the waves actually move in a circular motion?
kidi1232 7 months ago
@kidi1232 God swirls it with his finger like you or I do with our Kool Aid in a cup of water
itsMinuteMaid 7 months ago
@itsMinuteMaid Of course! it all makes sense now! NASA should hire you. no, you should hire NASA.
kidi1232 7 months ago
@kidi1232 soundwaves? What? Are you serious?
culwin 7 months ago
@culwin well, there's a lot of gas and dust, and soundwaves are waves of density in gases / small particles, so why not?
kidi1232 7 months ago
Do the Universe have a coriolis effect ? - That is does the relative rotational directions of galaxies tell us anything about the structure / topology of the universe ? Is there a tendancy to rotate one way 'over here' and the opposite 'over there' ? Is it random / 50-50 chance ? What is the reason that a particular galaxy formed rotating the way it did i guess is the deeper question ?
Hythloday71 7 months ago
@Hythloday71 This is a good question, I hope someone who knows there stuff can give an answer. Indeed, has there been a study into the distribution of the rotations of these galaxies? I'm guessing it's likely that they seem rather randomly distributed in that sense.
jamma246 7 months ago
Holy shit. A "wave of density."
heyandy889 7 months ago
Considering the fact that the Earth is orbiting the Sun at an incredible speed in addition to the fact that our galaxy is moving around at an incredible speed, would life on Earth be a lot shorter if this were not the case since time is relative to speed?
CompleteRationality 7 months ago
I'm so happy vsauce showed me this channel :D i love astronomy!
xnax1993 7 months ago
is it just me or does he talk unusually fast?
safenders 7 months ago
@safenders Solution is to listen faster. He talks at a good pace, but definitely not anywhere near how fast some people talk.
regemo 7 months ago
@regemo well I can understand him just fine but I seem to lose interest in what he's saying and start to focus on the rhythm of the words lol
safenders 7 months ago
What is the cause of the density wave ? The black hole at the center ?
1isaacmusic 7 months ago
@1isaacmusic I believe it is, I doubt the density wave is causing the black hole, although black holes without any matter, fade!
javonoUTube 7 months ago
@javonoUTube They look so much like the 2d simulation of gravitational waves on Wiki, for two Neutron stars tho'.
1isaacmusic 7 months ago
I can't help but wonder why every one of these videos has a single down-vote?
codykonior 7 months ago
@codykonior
I suspect Professor Moriarty...
2xsf 7 months ago
The video shows an image of the supernova "of summer 2011" in the "Whirlpool Galaxy" M51. It was brightest around June 20, and could already be discerned in a telescope with a mirror/lens of 5-inches in diameter back then. It's brightness has dropped since then, but it can still be easily seen in a 10-inch telescope - provided you observe in dark skies.
eltamin1966 7 months ago
you guys should do a video on lenz's law and eddy currents :P
lirothen 7 months ago
From my knowledge the arms are created due to the rate at which material is ejected from the nucleus of the galaxy. The system rotates at a fixed velocity but the rate at which matter is projected(your waves I guess) is erratic.
525047 7 months ago
6:15 Doesn't relativity say that it doesn't really matter, that true you could argue we were standing still and the arms are sweeping through us, or the arms are standing still and we're sweeping through them? So it doesn't really matter and the answer to the question is both? Correct me if i'm wrong..
devinekralc 7 months ago
I love the videos :)
FORGODSAKEIDONTKNOW 7 months ago
What are the proffessor's opinion's on Prof. Brian Cox??
ZodeakUrganomix 7 months ago
Science can be really fun sometimes, when they say things like, "We don't really know why it works this way, so we're going to make an educated guess and assume it works some other way, then all nod our heads as if we believe it."
The most fun bit is that theories and ideas are often presented as fact, instead of being presented as just theories and ideas.
theverbalrelease 7 months ago
@theverbalrelease No, a theory explains a fact, it can not be a fact or an idea. That's how it works. A theory can make predictions about the fact. If the prediction fails then the theory is thrown out or revised. Look it up because a Scientific Theory and a "theory" are two very different things. Here is a good example of a theory: The fact of biological evolution is best explained by the Theory of Evolution.
Grymyrk 7 months ago
@Grymyrk
Well put. It's actually very simple, but many people seem to have great difficulty understanding it.
Most of the time I believe it's because they choose to not understand, but I don't think that's always the case.
2xsf 7 months ago
@Grymyrk You are just plain old autocratic!
javonoUTube 7 months ago
@theverbalrelease By calling them "theories", you are trying to imply that they do not have evidence - proof - to back them up. That is false and intentionally misleading.
culwin 7 months ago
@culwin If something has evidence, but not enough evidence to prove the theory, it is still a theory, especially considering sometimes even though there may be some evidence, it might exists for reasons outside of the theory. Only when something is proved does it stop being a theory.
theverbalrelease 7 months ago
@theverbalrelease That is not the only meaning of the word "theory", and I think you know it. Troll harder.
1.
a coherent group of general propositions used as principles of explanation for a class of phenomena: Einstein's theory of relativity.
2.
a proposed explanation whose status is still conjectural, in contrast to well-established propositions that are regarded as reporting matters of actual fact.
culwin 7 months ago
@culwin At its base, there is theory and fact. Before an idea is proven, it is theory. Once it is proven, it is fact. It's really quite simple. Have a nice day :).
theverbalrelease 7 months ago
This has been flagged as spam show
@theverbalrelease Yes, it is really quite simple. You are wrong. See ya.
culwin 7 months ago
@theverbalrelease In Science a theory is there to explain the facts and provide us a model. So a theory in science is just as important if not more so than fact.
Snazzydog333 7 months ago
supernovae
wvhdogg 7 months ago
@mykmmc Space is not a vacuum so there is sound in space. The waves you see in this video ARE sound. However the wavelength of sound in space is very big, so you cant hear it unless it is being compressed by a computer. :)
GammahooX 7 months ago
@GammahooX space is a vacuum retard so there is no sound retard
johnny52472 7 months ago
@GammahooX no. space is a vacuum.
volound 7 months ago
@volound
Well, it's an imperfect vacuum. There is quite a lot of material to be found in any given region of space, but no, it shouldn't be enough to carry things like sound waves, regardless of wavelength. The particles of matter are separated by far to much empty space to carry a coherent wave.
InB4Desu 7 months ago
@InB4Desu which is exactly what i was alluding to.
space is (effectively) a vacuum, although it isnt a perfect vacuum.
volound 7 months ago
@InB4Desu Yes, space does carry sound. Watch the video your commenting on again.
It explains how sound waves of very large wavelengths move around the galaxy in certain patterns and create those spiral arms and even tho the galaxy looks pretty dense from far away, think about all that "empty" space between the stars and planets - it does carry the wave.
GammahooX 7 months ago
@GammahooX This video has nothing to do with sound. Are you a troll? If so, good one, you got me.
culwin 7 months ago
@culwin He says the wave moving around the galaxy is a wave of density. And what are waves of density usually called? Sound. In this particular example: Infrasound. Why do you try to correct other people if you have no idea what you're even talking about? You should've learned that in school.
GammahooX 7 months ago
@volound Space cant be a vacuum (meaning that there is ABSOLUTELY nothing in it), because WE are in it, even if you only mean that "black stuff" all around us, there are still a couple of hydrogen or helium atoms in it.
GammahooX 7 months ago
@GammahooX i already know this. why did you post that comment?
volound 7 months ago
This has been flagged as spam show
@volound If you knew that space is not a vacuum, then why did you say "no. space is a vacuum."?
GammahooX 7 months ago
Yeah, 620 likes out of 300 viewers. Everybody knows that the guys from Sixty Symbols are brilliant; everybody votes twice!
mladengv 7 months ago
Interesting as always. My most loved YouTube Channel by far.
Bobajobimus 7 months ago
Charlieissocoollike in a couple of years :D
ahreurink 7 months ago
interesting, i wonder if dark energy is helping to form the wave, but i suppose thats overly simplistic.
shafta99 7 months ago
I notice you've got the "Atlas of Creation" in your bookshelf. Is that there for whenever you want a good laugh?
kentrel2 7 months ago 50
@kentrel2 Yes, he answered that in a different video.
hingeslevers 7 months ago
@kentrel2 well spotted.
volound 7 months ago
@kentrel2 there is a video on the channel explaining that book
Lessien881 7 months ago
@kentrel2 do your researches this book gives arguments against creationism
LedKenji666 7 months ago
I'm wondering what makes the spiral arms light up if there are also stars in between them...
afhdfh 7 months ago
"There's nothing like a bit of galactic spiral arm star formation in the morning."
8DX 7 months ago 27
what the fuck? i feel really stupid now
pabloenis 7 months ago
Nice! But how do we have pictures of the milky way or are they just computer generated?
V3N0MousProductions 7 months ago
@V3N0MousProductions the pictures of the "milky way" we have are from the inside out, only a part of the milky way galaxy. We can't take pictures of it in it's entirety from here
Riou2294 7 months ago
@Riou2294 That's what I was thinking, but I thought I saw some pictures of it...turns out they were just computer generated
V3N0MousProductions 7 months ago
my mind was just blown
jordanmjk0 7 months ago
Aparently the universe it flat.
G3org3Master 7 months ago
I was wondering about how dark matter keeps the galaxy together.
thernr 7 months ago
Does moving in/out of a spiral arm have any effects? My intuition says no, but am I incorrect?
1RadicalOne 7 months ago
@1RadicalOne listen to the last part about stars.
G3org3Master 7 months ago
No, not on star formation, but effects on preexisting stars and their planets, if any.
1RadicalOne 7 months ago
@1RadicalOne I think he said something about supernovas only happening in the gas dense area? Im not sure about planets though.
G3org3Master 7 months ago
He made that comment because it implies that star formation takes place almost exclusively in the spiral arms. But again, that is not what I am looking for.
1RadicalOne 7 months ago
@1RadicalOne OK then I do not understand what he meant because it seems like a contradiction saying that stars move in and out of the arms over time.
G3org3Master 7 months ago
No, he was talking about massive stars when talking about the supernovae; those stars live only a few tens of millions of years, and that was his point: those stars essentially die where they form and thus where there are supernovae, there is star formation.
1RadicalOne 7 months ago
@1RadicalOne Thank you, now I understand.
G3org3Master 7 months ago
@G3org3Master The stars in an arm are not all moving the same direction or speed.
culwin 7 months ago
Welcome back viewer 303!
btcpxx 7 months ago 2
Question: Could the density wave be gravity waves from the super massive black hole in the center of the galaxy?
AtheistKharm 7 months ago 2
A great birthday present! Thank you!
hyungsup2 7 months ago
Every part spinning in unison looks like a spinning gear or wheel, not rotating freely like the runners around the track.
TeslaRifle 7 months ago
Are we currently on the leading or trailing edge of a wave?
fegolem 7 months ago
@fegolem I asked this also, with no replies. According to NASA and contemporary belief we are in a Local Interstellar Cloud, also according to NASA & some Russian astronomer we are now entering a denser area of the Interstellar cloud that is affecting the Sun's magnetosphere. I would like to know if the denser area is the centre of the Wave/Arm?
javonoUTube 7 months ago
I wonder if the spirals are from gravitational waves.
drax325 7 months ago
How about sombrero galaxy? :D
Azianxss 7 months ago
more likes than views?
PizzaManTech 7 months ago
@PizzaManTech YouTube is slow at first updating their views.
ndrthrdr1 7 months ago
you guys need your own show
krypekeeper 7 months ago
@sixtysymbols I had made a video repost (i personally made the video) and the research i put inside of the video and information section of the video is specifically a question i have for this professor, please accept my video response and don't be fooled by its title, I'm not talking about a man in the sky but Thales-Einsteins Spinoza's God and Golden-Ratio Spiral Phi Vortex Structures etc
sn1pe352 7 months ago
You spin me right round baby right round
Like the Milky Way
Right round round round.
orochimarujes 7 months ago
Anyone else see the 'Atlas of Creation' book on the shelf. I laughed. It would be more appropriate to use it as a door stop than to display that trash on a shelf.
YZBot 7 months ago
@YZBot They discuss this in another video... basically the Prof says he likes the pictures in it
culwin 7 months ago
Hm-mm, ... That never occurred to me before ...
UNLIKE EVERY OTHER EVERY OTHER THING I WAS TO GODDAM DENSE TO PICK UP ON!!!!
Thanks for the enlightenment. : )
HandsInMyHead 7 months ago
@THEkidYOUallKNOW24 we can't see the full structure of the milky way
InterstellarSilver 7 months ago
How does NASA get pictures of the Milky Way? How is it that we could see its full structure even though our most powerful telescopes are circling earth? Can anyone explain
THEkidYOUallKNOW24 7 months ago
Is there any evidence to suggest that these density waves are caused by gravity waves?
Sparkygravity 7 months ago
I watched a vid that had the "sound" of a pulsar? if space is a vacume how dose one hear sound?
mykmmc 7 months ago
This is some great insight into the overall complexity of galactic processes!
ericsbuds 7 months ago
I'm sorry, I thought that dark matter was the force that caused the outer arms to keep speed. Doesn't this theory contradict that?
trevadetrev 7 months ago
Great vid
GuppyPal 7 months ago
Great video!
coolliger 7 months ago
The galaxy is a plasmoid, there, your questions are answered. But hey ignorance is a sad thing.
SuperFinGuy 7 months ago
some galaxies are spiral and some not, if the rotation of a galxy takes hounderts tousends years then u can not tell that the galaxy always was spiral, yo are watching one galaxy not more then about houndert years, like you gave the example whit the runers around the football field, maybe the galaxy is gona lose the spirals after some time just in larger skale? or why the other galaxies do not have spirals?
KillaKingStyle 7 months ago
hey proff, what do u think of white holes? recently ive been looking at the theory of it, Einstein's theory says its possible but not stable for long periods of time...we used to see black holes the same way we see the white hole (a mythological creature pretty much), but what do u think of it?
XxhilfmirxX 7 months ago
@XxhilfmirxX For goodness sake, tell me where in Einstein's theory does it say that black holes (or even a white hole) are possible??! I'd pay you good money if you showed me. Please stop lying or tell that to whoever lied to you, thank you.
SuperFinGuy 7 months ago
pythagoras / keplars Music-harmony of the spheres explains alot of this, Walter Russell has explained ALL of this (If only academia would take notice of him)
sn1pe352 7 months ago
Degrees per second! Hahah! Are pattern rates based on comparisons with the earliest photographs of galaxies? How far back does the evidence you are using go?
xlrv1 7 months ago
M51 rocks !! Great spiral galaxy, I'll aim my scope to that by the next week when the Full moon while start to fade
Neueregel 7 months ago
This is one of the most worthwhile/fun channels I've found! Thanks so much for taking the time to make these videos.
whatsarobut 7 months ago
cool
AdamaKnowsBest 7 months ago
1:30
No you.
BlankSharpie 7 months ago
Wow, that's really quite clever, using supernovae to figure out where stars are forming in galaxies!
olishant 7 months ago
I always wondered what is in the center of a galaxy it looks like a giant sun but it could be a bunch of stars in a short distance. I want to know what it is someone please tell me.
ravenheart93 7 months ago
@ravenheart93 I think the theory is that at the center of a galaxy is a ridiculously massive black hole with millions of stars orbiting around it at relative close range. But there's probably a lot more to it.
noxure 7 months ago
@ravenheart93 A supermassive black hole sucking young stars. It's yellow because there are millions of stars compacted there
Neueregel 7 months ago
Perhaps in the grand scheme of things spiral galaxies aren't that old and so they still have their spiral patterns, but will deform in a few billion more years. Just a thought.
counterclockwise123 7 months ago
I can't quite visualize the wave. Are you saying the arms themselves are the waves?
bmbirdsong 7 months ago
It's things like this that make me feel helpless sometimes.
yngmalm 7 months ago
I thoroughly enjoy watching these videos, always gives me something fresh to bring to my physics class, very well edited and presented too.
ExtremePiez 7 months ago
Is all astronomy this exciting!
Mojosbigstick 7 months ago
@Mojosbigstick As with anything, it is completly based on your attitude toward it
1KevinsFamousChili1 7 months ago
@Mojosbigstick my friend did astrophysics, thought it was like this and then realised he was just studying various branches of how light works and what you can glean from it. personally it sounds quite interesting to me though.
DaveAtLeeds 7 months ago
What if the Supernova was caused by a giant stable star entering the Wave, where critical mass was induced by the energy in the wave and caused the Supernova?
javonoUTube 7 months ago
This has been flagged as spam show
i love this channel
bikerox 7 months ago
new youtube player is slick
MagnesiumMichael 7 months ago
Is the Interstellar Energy Cloud(Alexei Dmitriev) we are now entering, with more density than the local interstellar cloud one of these arms/wave? What effect would travelling into the wave have on our Solar System? Obviously the arms are created by the Black Holes gravity as water going down a plug hole!
javonoUTube 7 months ago
Maybe because of the mass at the center of the galaxy, the spiral arms become part of some huge lagrangian point like area.
nchiley 7 months ago
thanks for uploading.
SoGladToKnowYou 7 months ago
This has been flagged as spam show
Very very interesting
WorldwideWakeupCall 7 months ago
this is scary, in a few years human race will know so much about the world that they may get to meet the aliens in control of the milky way, if we know too much about the universe, then we will have to consult with the head of the milky way before we do anything, its probably the grey aliens. we're growing up as earthly creachures
Zee96969696 7 months ago
@Zee96969696 Aliens have not been proven to exist. Stop reading fairytales.
Neueregel 7 months ago
I was going to post the angular speed of our galaxy in radians/second, but there's the 500 character limit :(
FHomeBrew 7 months ago
heh, I just found the wiki and the density wave theory seems to be like 50 years old! Good animations in that wiki to understand how the stars move between the arms.
Density_wave_theory @ wiki
damianpaz 7 months ago
Could these waves be electromagnetic waves?
nickharvey7 7 months ago
@nickharvey7
They are density waves which compress the gas causing star formation.
ytmoog 7 months ago
@nickharvey7 electromagnetic waves will be in effect here, but the waves on this colossal scale are due to the huge amounts of mass. confusing!
DaveAtLeeds 7 months ago
0 dislikes. Love it
Greenehh 7 months ago
Seems that "waves" are the new black in science. Waves for electrons, waves for galaxies, waves for everyone! :)
I'm glad to see scientist are attacking the mysteries with all they have.
Oh, and Nice video!
damianpaz 7 months ago
is the footage at @4:55 playing in reverse? i always imagined spiral galaxies to rotate with the arms trailing and not leading.
mazzepa1 7 months ago 14
@mazzepa1 the galaxy's not rotating, just the camera or spaceship from which we're viewing it! ;)
sixtysymbols 7 months ago 37
@sixtysymbols I thought given two objects you couldn't determine which of the two is 'stationary' and which is moving, only define which is stationary
Sordeo 7 months ago
@sixtysymbols
I knew you had the technology to build a spaceship, now share with the rest of humanity!
m00niee 7 months ago
@mazzepa1 its just a bloody picture and a certain graphic effect that makes it look like moving
omg5501 7 months ago
Thanks Brady and Prof Merrifield! I had to watch that twice as I found the wave concept, as applied here, difficult, but think I understand now, thanks to the last bit about the wave often travelling independently to the stars. For me it just raises more questions, but thats par for science. off to extra footage time :)
jeebersjumpincryst 7 months ago
Nice - thanks for posting!!
2plus2make4 7 months ago
Is it true that they have find an almost perfect replika of our milkyway galaxy . Just couple times bigger
FinTheDew 7 months ago
@FinTheDew Many....
2plus2make4 7 months ago
@2plus2make4 ofc they have found many other galaxies but just lately exact replica of your galaxy
FinTheDew 7 months ago
@FinTheDew There are many spiral galaxies that resemble our own, of course none are an exact replica but agree it is cool to see others from a different angle. We can more easily imagine what our own looks like from a distance. I enjoy looking at the various images of spiral galaxy collisions at different stages - it is kind of cool to be able to "see" the whole process at different stages and imagine our position when Andomeda passes through the Milky Way in a few billion years.
2plus2make4 7 months ago
@2plus2make4 I didnt mean that if another galaxy is spiral its milkyways replica but whatever you dont seem to understand my point
FinTheDew 7 months ago