Does a black hole have sides? By that I mean If we look around it will it look like a circle in all directions, like a sphere or it will look almost invisible because it's thin?
The black hole itself is a sphere, but because of the space-time distortions around it, its appearance is a lot more complicated than that. The effects in "Spaceship Spitzer: Enemy Mine" were done in collaboration with one of the theoretical physicists that works here to make them reasonably accurate. It would probably look something like that from all angles.
You showed e-s around the nucleus in the star where they would be bare nuclei...
In chemistry class I had to memorize that an atom refers to the protons AND e-s and an "ion" is used for atoms when e-'s are not all there and stars cores will not have e-s circling the nucleus...don't make it SO simple it's misleading...Cosmic Ray
Since protons are the matter of light itself, is it conceivable to have something "ride" a proton? Like a really small camera or beacon of some sort. It'd be great to send a proton into space and observe what happens.
I think you mean "photons." Photons behave like particles, but they don't have mass (only momentum), so they're not really matter like an electron, neutron, or proton. But, in a sense, that's what we do when we transmit radio waves. We vary the amplitude or the frequency of the photons we send out to "carry" information away. With radar, we listen for the echoes of those photons, and therefore get information back from the photons we sent out. A little more abstract than you mean, but...
Great answer. So what eventually happens to a signal sent out into space? I imagine it gets weaker (more dispersed) the further it goes but does it actually have an endpoint? Absorbed?
A photon will keep going until it is reflected or absorbed by something. But the number of photons you can pick up from a source is reduced by 1/4 every time you double the distance between the source and the observer (that's called the inverse square law).
Very interesting. If I understand this correctly, it seems amazing that we can see objects thousands of light years away (that their light isn't so weak as to lose the overall image completely).
If we had a telescope that was so powerful that we could see things 10,000 lght yrs away as if they were right in front of us, would we still be looking at 10,000 yr old light? I would guess because telescopic power only determines image resolution, not that it "sees" closer to the object.
Yes, the Universe expands in all directions, but it's actually a much more complicated process than that, because current models imply that the Universe is infinite. We can only see the part of it that is close enough that the light from it has had time to reach the Earth since it formed. Cosmologists are currently working on understanding how it can be expanding and infinite at the same time, and there are some excellent theories out there, but lots of research yet to be done!
What the video doesn't tell (and I want to know) is what happens to the white dwarfs, do they shine on forever or do they just wanish after a time? And to the black holes? Don they keep amounting/sucking more and more mass or do they consume themselves? What happens?
There's a whole field of cosmology that's dedicated to understanding what the Universe will look like over incredibly long timescales. The short hypothesis is that white dwarfs will continue to cool down and black holes will evaporate. But there's lots of research to be done, and those questions would make a great doctoral thesis! :)
A star that has 3 times the mass of our Sun WILL NOT collapse to become a blackhole!!!
This video is extremely wrong. You need a star that has at least 8 times the mass of our sun for it to become a neutron star... and for a star to go directly to a black hole you need around 60 times the mass of our sun. Everything she said was with respect to the core of that star. Neutron stars occur if the mass of the white dwarf is over 1.4solar masses. Blackholes occur if neutron stars mass is too great.
Uhh i get that two but we all have our strengths and weaks for example I am very good at astro physics. even though im 12 but He is just sayin light takes time to reach our position on earth because outer space is so big. Even though it travels 186,000 miles per second.= the universe is huge!!
she forgot to tell this also, when we see a star, we see how it was 1 billon or maybe 100 billon years ago. well the speed of light hits the earth 100 billon years later but the star maybe dead about that time so speed of light is not very fast compired to billlons of kilometers away
how can a star be 100 billion years old when the unvierse`s age is estimated at 13.8 billion years ???? This guy has no idea what a billion means. Should start by looking at baby einstein videos and then move on to post comments worth reading.
look i gave a example ok i dont know how long the universe lived and you much star live so i gave a estimate and if you dont know what estimate mean estimate mean geussing an amount i didnt say that because your stupi just to be sure
okey dokey, youre right your overall idea was right although greatly miscalculated. my mistake for making fun, im sorry about that !!!! hope no hard feelings though. i just bought a dvd set on amazon called "the universe" by the history channel, what youll learn watching this is inmense and very fun and easy to watch too. Sorry again, hope this helps, take care !!
wich on the other hand if i take a single atom and i wanna accelerate it to HALF the speed of light using conventional rocket fuel the amount of fuel required will be greater than the mass of the entire visible universe! so how could matter in a period of 13.7 billion yeas had traveled that far when matter suppose to travel alot less than light speed and cant even reach HALF the speed of light ??!!!!
The simple answer is that the speed of light is the speed limit INSIDE the Universe, but the Universe itself is free to expand faster than that. As for why that works, I don't understand it myself...
the big bang theory stated that the entire universe was infinitely densted together in a size like a star and it exploited so it was matter denst together but how come they say the universe 13.7 billion years old and we've explored about 10 billion light years of the universe inwich equevalent to about 50 sextillion miles (one follow by 21 zeroz) so how could matter have gotting that far and reached that distance ?
ok thank you but i have another question that boggled my mind here!and its about the big bang. no object with mass can accelerate to the speed of light that because the total energy of an object is its mass x v2 so as it speed up it gets more massive as it opproaches light speed it mass becomes near infinity require infinat amount of energy to push it faster my question is:
ok i understand that the closer you get to the speed of light the more your clock slows down .i love physics but i never get a chance to study it can you give me the equasion for time with explanation please and tell me how you link it to the 3 dimension.i also know that the speed of light is consent and to fit it you have to slowdown time
You're getting into VERY advanced relativistic physics with that question. I can't post a URL here, but if you do a Google search on "relativistic physics" you'll find a site on a server called johnstonsarchive. The "background" and "equations" pages are some of the simlest discussions I've managed to find. That said, the specifics of time dilation are still being debated by the scientists...
It would be more accurate to say that we see time as "change" instead of as a physical dimension like length, width, and height. How something changes over time is its fourth dimension.
thank you very much for your explanation that was good but i didnt get one point here , i can understand the length, width, height, but what is time has to do with it ? and where is the time dimension located in this what i imagine it as a square shape if i'm not mistaking . so where is the dimension of time suppose to be?
Imagine time being like a freeway. The freeway has a length, a width, and a height. At rush hour, it's full of cars, but late at night it's nearly empty. That's the time dimension, each point in time (time of day) is every bit as unique as the length, the width, and the height. We don't "see" time because of the way our brain works. We just see time as passing us by, but it's actually just as real as the other three dimensions.
ok guys i'm sorry to go off this subject for alittle bit but i'm fan about space and i would love to know the answer to this ! what are the dimension of spacetime i hear ppl talks about 4th dimension or 5th etc.. what are those dimensions to beggan with ?
Basically, there are 4 undisputed dimensions: length, width, height, and time. Various theories state that there could be a fifth, up to 12, or an infitinite number of dimensions, but there's no consensus yet among cosmologists. Hope that helps!
What about a super nova? Is that when a star blows up? and if a star dies and makes a black hole....then there has too be lots of black holes in are Milky Way galaxy...unless all the stars are fairly new. Wow...astronomy is so freaking awesome!!!!
A supernova is when a star explodes and forms a black hole. Most of the stars in the Milky Way are too small to make black holes. Our sun is actually pretty big, on average, and it'll make a white dwarf, not a black hole. Only really huge stars make black holes.
Black holes stretch and twist matter long before sucking it in. You would die at around this stage. What happens after death, that's a whole other topic :P
Also lacking is the iron core bounce, quantum superpositioning, degeneracy pressures vs thermonuclear/gravitational equilibrium, the chandrasekhar limit, time-like space inside a black hole, hawking radiation, spinning versus non-spinnin black holes, Pauli exclusion, Heisenberg Uncertainty, and all those other things that probably won't come up until the children this video is aimed at take a college level course on astrophysics.
thank u so much for the video >.< actually can u send me the video, because i need it for my science seminar and in my science's room, there isn't any internet connection so I can't show my teacher the video >//<
thank u so much for the video >.< actually can u send me the video, because i need it for my science seminar and in my science's room, there isn't any internet connection so I can't show my teacher the video >//<
Does a black hole have sides? By that I mean If we look around it will it look like a circle in all directions, like a sphere or it will look almost invisible because it's thin?
GuruGulu 2 years ago
The black hole itself is a sphere, but because of the space-time distortions around it, its appearance is a lot more complicated than that. The effects in "Spaceship Spitzer: Enemy Mine" were done in collaboration with one of the theoretical physicists that works here to make them reasonably accurate. It would probably look something like that from all angles.
SpitzerJim 2 years ago
OMG!!!
This has helped me SO much!!
Thank you for posting!!!
milliebabii 2 years ago
You showed e-s around the nucleus in the star where they would be bare nuclei...
In chemistry class I had to memorize that an atom refers to the protons AND e-s and an "ion" is used for atoms when e-'s are not all there and stars cores will not have e-s circling the nucleus...don't make it SO simple it's misleading...Cosmic Ray
CosmicRay137 2 years ago
Oops, I mean Photon, not Proton. Sorry.
Shanelanta 2 years ago
Since protons are the matter of light itself, is it conceivable to have something "ride" a proton? Like a really small camera or beacon of some sort. It'd be great to send a proton into space and observe what happens.
Shanelanta 2 years ago
I think you mean "photons." Photons behave like particles, but they don't have mass (only momentum), so they're not really matter like an electron, neutron, or proton. But, in a sense, that's what we do when we transmit radio waves. We vary the amplitude or the frequency of the photons we send out to "carry" information away. With radar, we listen for the echoes of those photons, and therefore get information back from the photons we sent out. A little more abstract than you mean, but...
SpitzerJim 2 years ago
Great answer. So what eventually happens to a signal sent out into space? I imagine it gets weaker (more dispersed) the further it goes but does it actually have an endpoint? Absorbed?
Shanelanta 2 years ago
A photon will keep going until it is reflected or absorbed by something. But the number of photons you can pick up from a source is reduced by 1/4 every time you double the distance between the source and the observer (that's called the inverse square law).
SpitzerJim 2 years ago
Very interesting. If I understand this correctly, it seems amazing that we can see objects thousands of light years away (that their light isn't so weak as to lose the overall image completely).
Shanelanta 2 years ago
If we had a telescope that was so powerful that we could see things 10,000 lght yrs away as if they were right in front of us, would we still be looking at 10,000 yr old light? I would guess because telescopic power only determines image resolution, not that it "sees" closer to the object.
Shanelanta 2 years ago
Yes, the telescope just magnifies the image. The light is still 10,000 years old.
SpitzerJim 2 years ago
cool, but i don't get why black holes are black and invisible But if it sucks in light doesn't the light show the black hole?
MapleStoryP 2 years ago
Because light cannot escape a black hole. If it can't escape, you can't see it, so the black hole is black.
VlGGY 2 years ago
Does anyone else think that Michelle is sexy? I think shes bloody hot
NicosMind 2 years ago
What happens to black holes? Do they live forever or die out? and when they die out what happens to them?
BTW i think youre great answering all these questions! You help me so much in my science.
eljpayne 3 years ago
Right now the consensus is that black holes eventually evaporate, but there's still a lot of research to be done in that field!
SpitzerJim 3 years ago
Does not the universe expand in all directions?
witch means you have to double the distance from end to end?
Witch means 13.7 Billion years in radius would become a diameter of 27.4 billion years in diameter?
Correct me if I'm wrong
Popupkille 3 years ago
Yes, the Universe expands in all directions, but it's actually a much more complicated process than that, because current models imply that the Universe is infinite. We can only see the part of it that is close enough that the light from it has had time to reach the Earth since it formed. Cosmologists are currently working on understanding how it can be expanding and infinite at the same time, and there are some excellent theories out there, but lots of research yet to be done!
SpitzerJim 3 years ago
I got a question and if possible please make video of it can cosmic rays give you super powers?
GuruGulu 3 years ago
Of course not. That's purely fiction.
JonathanClement140 3 years ago 2
Incase you haven't noticed we don't purely understand human evoloution so there's a chance.
GuruGulu 3 years ago
What the video doesn't tell (and I want to know) is what happens to the white dwarfs, do they shine on forever or do they just wanish after a time? And to the black holes? Don they keep amounting/sucking more and more mass or do they consume themselves? What happens?
katmandu2k 3 years ago
There's a whole field of cosmology that's dedicated to understanding what the Universe will look like over incredibly long timescales. The short hypothesis is that white dwarfs will continue to cool down and black holes will evaporate. But there's lots of research to be done, and those questions would make a great doctoral thesis! :)
SpitzerJim 3 years ago
What about supernovas.
notinitro 3 years ago 2
u r sorta rite but neutron star occurs when the mass of the white dwarf is more than 2.5 solar masses;not 1.4!!!but overall ur rite..cheers..
xxsakibxx 3 years ago
A star that has 3 times the mass of our Sun WILL NOT collapse to become a blackhole!!!
This video is extremely wrong. You need a star that has at least 8 times the mass of our sun for it to become a neutron star... and for a star to go directly to a black hole you need around 60 times the mass of our sun. Everything she said was with respect to the core of that star. Neutron stars occur if the mass of the white dwarf is over 1.4solar masses. Blackholes occur if neutron stars mass is too great.
sanchn0r 3 years ago 5
what do you know?
wayne8001123 3 years ago
ahhh too many confusing words
PenguinCharmi 3 years ago
OMg im 12 years old and i get this you were joking rigt?
bdoughty814 3 years ago 7
im not talking about the video im talking about wat gencobaser said its hard to follow it
PenguinCharmi 3 years ago
Uhh i get that two but we all have our strengths and weaks for example I am very good at astro physics. even though im 12 but He is just sayin light takes time to reach our position on earth because outer space is so big. Even though it travels 186,000 miles per second.= the universe is huge!!
bdoughty814 3 years ago 3
she forgot to tell this also, when we see a star, we see how it was 1 billon or maybe 100 billon years ago. well the speed of light hits the earth 100 billon years later but the star maybe dead about that time so speed of light is not very fast compired to billlons of kilometers away
gencobaser 4 years ago
how can a star be 100 billion years old when the unvierse`s age is estimated at 13.8 billion years ???? This guy has no idea what a billion means. Should start by looking at baby einstein videos and then move on to post comments worth reading.
JCKAGDOB 4 years ago
look i gave a example ok i dont know how long the universe lived and you much star live so i gave a estimate and if you dont know what estimate mean estimate mean geussing an amount i didnt say that because your stupi just to be sure
gencobaser 4 years ago
okey dokey, youre right your overall idea was right although greatly miscalculated. my mistake for making fun, im sorry about that !!!! hope no hard feelings though. i just bought a dvd set on amazon called "the universe" by the history channel, what youll learn watching this is inmense and very fun and easy to watch too. Sorry again, hope this helps, take care !!
JCKAGDOB 4 years ago
Michelle Thaller was interviewed for several episodes of "The Universe."
SpitzerJim 4 years ago
o ok thats ok
gencobaser 4 years ago
you have beautiful eyes, very interesting lecture with a very beautiful girl
topito2 4 years ago
ok your hot!
lacollll 4 years ago
wich on the other hand if i take a single atom and i wanna accelerate it to HALF the speed of light using conventional rocket fuel the amount of fuel required will be greater than the mass of the entire visible universe! so how could matter in a period of 13.7 billion yeas had traveled that far when matter suppose to travel alot less than light speed and cant even reach HALF the speed of light ??!!!!
discountzone 4 years ago
The simple answer is that the speed of light is the speed limit INSIDE the Universe, but the Universe itself is free to expand faster than that. As for why that works, I don't understand it myself...
SpitzerJim 4 years ago
the big bang theory stated that the entire universe was infinitely densted together in a size like a star and it exploited so it was matter denst together but how come they say the universe 13.7 billion years old and we've explored about 10 billion light years of the universe inwich equevalent to about 50 sextillion miles (one follow by 21 zeroz) so how could matter have gotting that far and reached that distance ?
discountzone 4 years ago
ok thank you but i have another question that boggled my mind here!and its about the big bang. no object with mass can accelerate to the speed of light that because the total energy of an object is its mass x v2 so as it speed up it gets more massive as it opproaches light speed it mass becomes near infinity require infinat amount of energy to push it faster my question is:
discountzone 4 years ago
ok i understand that the closer you get to the speed of light the more your clock slows down .i love physics but i never get a chance to study it can you give me the equasion for time with explanation please and tell me how you link it to the 3 dimension.i also know that the speed of light is consent and to fit it you have to slowdown time
discountzone 4 years ago
You're getting into VERY advanced relativistic physics with that question. I can't post a URL here, but if you do a Google search on "relativistic physics" you'll find a site on a server called johnstonsarchive. The "background" and "equations" pages are some of the simlest discussions I've managed to find. That said, the specifics of time dilation are still being debated by the scientists...
SpitzerJim 4 years ago
so another word time has length, a width, and a height and we can see it we can only imagine it ?
discountzone 4 years ago
It would be more accurate to say that we see time as "change" instead of as a physical dimension like length, width, and height. How something changes over time is its fourth dimension.
SpitzerJim 4 years ago
thank you very much for your explanation that was good but i didnt get one point here , i can understand the length, width, height, but what is time has to do with it ? and where is the time dimension located in this what i imagine it as a square shape if i'm not mistaking . so where is the dimension of time suppose to be?
discountzone 4 years ago
Imagine time being like a freeway. The freeway has a length, a width, and a height. At rush hour, it's full of cars, but late at night it's nearly empty. That's the time dimension, each point in time (time of day) is every bit as unique as the length, the width, and the height. We don't "see" time because of the way our brain works. We just see time as passing us by, but it's actually just as real as the other three dimensions.
SpitzerJim 4 years ago
ok guys i'm sorry to go off this subject for alittle bit but i'm fan about space and i would love to know the answer to this ! what are the dimension of spacetime i hear ppl talks about 4th dimension or 5th etc.. what are those dimensions to beggan with ?
discountzone 4 years ago
Basically, there are 4 undisputed dimensions: length, width, height, and time. Various theories state that there could be a fifth, up to 12, or an infitinite number of dimensions, but there's no consensus yet among cosmologists. Hope that helps!
SpitzerJim 4 years ago
yadayadayadayada ba, yadayadayadayada ba?
Darkrewm 4 years ago
Thank you spitzer Jim!
whiteboyjimmy20 4 years ago
What about a super nova? Is that when a star blows up? and if a star dies and makes a black hole....then there has too be lots of black holes in are Milky Way galaxy...unless all the stars are fairly new. Wow...astronomy is so freaking awesome!!!!
whiteboyjimmy20 4 years ago
A supernova is when a star explodes and forms a black hole. Most of the stars in the Milky Way are too small to make black holes. Our sun is actually pretty big, on average, and it'll make a white dwarf, not a black hole. Only really huge stars make black holes.
SpitzerJim 4 years ago
Black holes stretch and twist matter long before sucking it in. You would die at around this stage. What happens after death, that's a whole other topic :P
URSExelcior 4 years ago
I wonder what would happen if we get sucked into a black hole, where would we end up? Heaven?
JcDizon 4 years ago
Science project on Stars?
Start with the types of stars: O B A F G K M
FiliberkeNys 4 years ago
I like it but what happened to the red giant/supergiant stage or supernovas? :(
FeynmanMH42 4 years ago
Also lacking is the iron core bounce, quantum superpositioning, degeneracy pressures vs thermonuclear/gravitational equilibrium, the chandrasekhar limit, time-like space inside a black hole, hawking radiation, spinning versus non-spinnin black holes, Pauli exclusion, Heisenberg Uncertainty, and all those other things that probably won't come up until the children this video is aimed at take a college level course on astrophysics.
jmckaskle 4 years ago
thank u so much for the video >.< actually can u send me the video, because i need it for my science seminar and in my science's room, there isn't any internet connection so I can't show my teacher the video >//<
EdeaSorceress 4 years ago
thank u so much for the video >.< actually can u send me the video, because i need it for my science seminar and in my science's room, there isn't any internet connection so I can't show my teacher the video >//<
EdeaSorceress 4 years ago
what a nerd
jamesrap123 5 years ago
Thanks a lot, I needed information about stellar evolution for my science exit project
homegirl131 5 years ago
As always, it's our pleasure. We're just glad you find them useful!
SpitzerJim 5 years ago
thank you, i finally got the easiest explanation! ;-)
felisdomesticus5676 5 years ago
You're welcome :)
SpitzerJim 5 years ago
Crisp and clear explanation of the final states that stars can take.... thanks
jas2754 5 years ago
I'll be sure to tell the writers! Thanks!
SpitzerJim 5 years ago
wow that was a great video, exactly what I was loooking for! Thx
zezimaowner123 5 years ago
It's our pleasure! Thanks for the kind words!
SpitzerJim 5 years ago
This is a really great explanation of what happens to stars when they die! Thanks for posting it!
sillysot 5 years ago
Thanks, sillysot!
SpitzerJim 5 years ago