Added: 4 years ago
From: SpitzerJim
Views: 198,532
Sort by time | Sort by thread (beta)

Link to this comment:

Share to:

All Comments (185)

Sign In or Sign Up now to post a comment!
  • so how do you think would large galaxies like the milky way created ? :)

  • There's a lot of ongoing research trying to answer that question, but right now our best model is that after the Big Bang, matter wasn't distributed evenly. The very slightly denser areas attracted other matter to them, and after a while most matter was clumped up into what later became young galaxies.

  • lol a galaxy eats an other galaxy ....never heard that before!

  • sure, if they;'re approaching one another and "combine", yes, yes I have!

  • If we have a couple of other smaller galaxies colliding with our own is this the reason we have more then one black hole in our galaxy. Does anyone know how many black holes our galaxy has?

  • Well there's a difference between blackholes and super massive black holes that aren in the center of galaxies. The only difference really being size. The blackholes in the center of most "active" galaxies are massive. When galaxies collide the black hole will orbit eachother and the galaxies will sort of spin through each other. On each orbit they will get closer and closer till they collide and become even bigger and the galaxy get bigger and becomes one galaxy with 1 massive black hole.

  • i don't know, a black hole may exist then it will be back to normal again. it is as far as i know. And i haven't heard that a galaxy will collide with the other because galaxies are so far apart from the Milky way. Andromeda is Lightyears away from us. It may be impossible that a galaxy will move closer from ours. I'm only thirteen and that's what i think.:D

  • thank you ..I learn something..

    As stated below; that the first I hear of a small galaxy colliding with ours ( ME TO )

    How come no one talk about this event?

  • This is the first time I have heard of a smaller galaxy already colliding with our own. Very informative and surprising.

  • It seems like it would be hard to find a job as an astronomer/physicist/scientist­? Is that true?

    I've always been so interested in astronomy and physics, but don't even know where to start, besides reading books from Stephen Hawking ;)

    Anyone have a suggestion?

  • It's a competitive field, but if you love it, then there's a place for you in it. Best place to start is by taking astronomy and physics classes, and seeing where your interests lead you.

  • but if a bigger galaxy collides with the milky way we're screwed

  • Surprisingly it probably wouldn't even be noticed. Reason is that it would happen so gradually that it would take many lifetimes for us "laypersons" to even notice. Only problem would be if a particular star were on course to collide with our particular star (the sun) which is highly improbable anyways. If collision were imminent then we would gradually realize that we were going to be "screwed" in the next million years or so. So; Don't worry, be happy!!

  • Andromeda is 2 times bigger then our galaxy...

  • Actually, some of our Spitzer scientists recently discovered that we've been underestimating the size of the Milky Way for decades. We now know that the Milky Way is, in fact, a little bit larger than the Andromeda Galaxy. That's part of what I love about astronomy. We're always having to rewrite the textbooks. :)

  • Milky way is bigger??? Then that means that we have more than 200.000.000 stars (the number of stars in the Andromeda), and the diameter of the Milky way would be bigger then 100.000 light years (as we thought before)

  • thats where aliens live? :o

  • By one of the U.K.'s scientists (i cant remember his name :D) there are 361 more civilizations in our galaxy counting with us there are 362 Civs. But so there are millions of stars and the distances are too big we can't reach each other.

  • by the latest calculation, there is a chance for developing a life like ours (being able to communicate trough universe) in this time only 2 in whole universe. That explains why all our searches in space came back empty. ;)

  • It can't really be calculated with any accuracy because even though we can estimate how many earth-like planets exist, we don't know the likelihood of life forming, nor do we know the likelihood of munticellular animals evolving, nor do we know the likelihood of intelligent life developing, nor do we know how long intelligent life exists before going extinct. However, to me those estimates seem too conservative. The universe is rich with organic molecules, and evolution is a powerful tool.

  • i do

  • any of you guyz think well ever get to travel space and explore further?

  • do any of you think there is a planet among the 2 magenalic cloud galaxies?I for one had no idea we were in the middle of a collision right now

  • Same I was surprised by that.

  • I new discovery from the Hubble shows that they found a life form planet in a solar system in our galaxy that is found in the same arm that our solar system is in. I watched a program on it on the discovery planet a few days ago.

  • So far, we've found the material that makes up living things, but we haven't found life itself anyone besides here on Earth.

  • love it.....peep my video ''to the stars'' its a journey from the earth to the universe.. im sure you'll enjoy the song i created for the video.... Ty Statz

  • Snicker Way lolz............the Galaxy probally like 1,000 light years away............T_T

  • Magellenic Cloud Galaxies ;)

  • how is it possible to take a picture of our own milkyway as shown??

    also off the subject stop at 0:30 hehehe

  • We use artist concepts when we need to show the whole Milky Way Galaxy. Obviously, the only real pictures we can get of it are from the inside looking out.

  • I calculated once how long it would take a probe to leave the galaxy so we could get a picture of it...and yeah... :(

    We'll have to wait for wormholes or something.

  • i think the more collisons the better so we can get protected for the big collision(milky way vs andromeda)

  • Well not get hurt, and it`ll be better to us. A SUPREME GALAXY!

  • Good idea. We only have 2.5 billion years of preparation left. :)

  • Dr, Are we going to die on 2012 which is known as Dooms Day? =(

  • nope, don't beleive the all the stupidity. The maker of the universe has a different time scale

  • Meet the maker of the universe. His name is Mr. Gravity.

  • A small galaxy! Is there such a thing!

  • hey now i love the ask an astronomer it really share a knowledge tnx for uploading the video

  • so if those 2 cloud galaxys orbit our galaxy does that mean galaxys as a hole have a gravitational pull?

  • Yes, the whole galaxy is made up of billions of stars, and all that mass creates a huge gravitational pull.

  • i thought in 2003 is the end of the world coz of mars is near to crash into the earth...that was really scary...

  • mars was the closest its been for ages in 2003, (about 35 million miles) i shouldn`t worry lol.

  • i read that the milky way and andromeda galaxy will begin to merge in 5 billion years time

  • Yes, they will merge and form an elliptical galaxy

  • yeah, about the time our suns eats the earth.

  • Andromeda... Go look at it...

  • Some interesting facts I looked up are: 1. Light takes 8 minutes to get to earth so what you see is the sun 8 minutes ago, it could've blown up for all we know! 2. We are 2.3 million light years away from Anromeda galaxy so it takes 2.3 million years for light to reach us, meaning were seeing andromeda galaxy as it was 2.3 million years ago!

  • all true

  • I hope the sun doesn't blow up. That would be annoying.

  • It won't. On the documentry "Death of the Sun" they say it's not big enough to. only very big stars bigger then our sun explode. What will really happen is that it will expand a lot and edventurly shrink into a white dawrf.

  • Actually the Trialgulum Galaxy M33 is the farthest naked eye object but it is only visible on very good conditions

  • lol @ 2:07

  • A dwarf galaxy colliding with ours right now. That is amazing.

  • she looks like she has 2 black eyes

  • For perspective. The Sun's light takes roughly 8 minutes to get to earth. Moonlight takes about 1.5 seconds. At the speed of light it would take 4 hrs to get to Neptunes orbit (current last planet in the solar system).

    So a light year is 131,400 times the distance to the edge of the solar system (based on Neptunes orbit)

  • one light year mean's it would take a year in the speed of light to get there. great vid anyways :D

  • so is one light year mean like 100 years to get there or somthing>?

  • Well, that depends on your speed. Going 1 mile at 1 mile per per hour takes an hour, but going 60 miles per hour it takes a minute.

    Doing some quick math, it looks like Voyager 2 would need about 15,000 years to go one light-year, and that's one of the fastest-moving spaceships we've got.

  • First , you must know that all light travel at speed of 3 x 10^8m/s

    Then use 3 x 10^8m/s X 60(minutes) X 60(hour) X 24(days) X 365(Year) = 9,460,800,000,000 KM = 1 light year

    Light year is the calculation of distance and time taken for light to reach.

  • i read once that the triangulum galaxy is actually a bit farther away than the andromeda galaxy. just a tidbit i'd picked up.

  • Why do people watch these videos and then comment as though they are the specialist on the universe. I though this was a cool video and actually had no idea about the colliding small galaxies. I'm going outside right now to see if I can spot Andromeda before our galaxies get married.

  • it is the speed limit of the cosmos! theres an awesome 5 part series by history on youtube

  • A light-year is the distance that light travels in one year in a vacuum. It's about 9.5 trillion kilometers, or about 5.9 trillion miles.

  • i wanna know if there is alien or other earth in space?

  • So do we. There's a lot of research left to be done in that field.

  • but i heard nasa found new glaxlay but its take 2millon year with nasa spaceship.and they said if we make a ship like ufo we can go there in 1 day

  • Thank you for posting this. I love to watch videos on space.

  • excellent answer. I enjoyed the illustrations. was not one of these small galaxies nicknamed snickers?

  • Why should we care about anything beyond earth's orbit? Knowing about all these galaxy doesn't solve world hunger.

  • Posting comments on Youtube doesn't solve world hunger either. Neither does your internet connection.

  • Posting comments on YouTube doesn't waste billions of dollars.

  • Youtube was bought by Google for over one billion dollars. Shouldn't Google have spent that money on world hunger instead?

  • alright dont worry i know now :)

  • Exploration and the pursuit of knowledge comes at a cost.

    If most people had your attitude, we would all still be in the middle ages.

  • i think you do have a point. i love science, and i think it's extremely important. but there are some serious problems here on the surface of our planet. we have the resources, skill, money, compassion, drive to create an absolute paradise for every single person on earth. but we don't. because we're lead around by the nose by people who don't see the big picture. because no one taught them science. taught them how every human is connected to the entirety of existence.

    so we're back at square 1

  • oh, wow, I didn't konw Canis Majoris was so close! o.o mind bottleing... I'm so looking for it now lol, and the andromeda galaxy (which will eat the milky way in about 3 billion years... O.O)

  • actually, we are about the size of the Andromada Galaxy

  • Yep, that was discovered after we made this video. Love the fact that there's still so much research going on in the field!

  • Actually, the Andromada Galaxy is a bit larger than ours.

  • the video says a dwarf galaxy is colliding with ours not Andromada. That is 3 billion years away from happening. Also I know it is not a dwarf galaxy.

  • To EraofAwakening your wrong. We currently believe that andromeda is on a merging course with us, that will happen in approx 2-3 billion years. We currently have 2 dwarf galaxies merging with our own galaxy the milkyway that is stated in this video

  • Very informative, thank you for the upload.

  • Cool vids!simply detailed for anyone to understand!

  • 1 lightyears is 6 trillion miles

  • Allahu Akbar. Read the Koran. You will find this all

  • 1 lightyears is equivalent to 10 trillion miles..

  • A light-year is about 9.5 trillion kilometers, or about 5.9 trillion miles.

  • That's actually really cool!

  • 2 million light years away, holy cow!!...5.8 trillion miles is one light year! so, 5.8 trillion X 2 million to get your distance away in miles...WOW!!

  • That is . . .

    really cool 8D

  • Which* is our Nearest Neighbor Galaxy? Name the Galactic Entity Most Proximal to Our Own Milky Way.

  • No...not true. The nearest is call the Mars bar.

  • Nuh uh its a Snickers.

  • Wait... if every galaxy is composed of a Blackhole in its center... Doesn't that means that the Canis Majoris dwarf galaxy has a blackhole the nearest blackhole to Earth?? or is there a definition for a dwarf galaxy I'm missing? Anyways this information about the dwarf galaxies that are colliding with ours was unknown to me. Thanks!

  • only galaxys not dwarf galaxys

  • Makes you wonder if there was life on any of the planets in systems affected by the collision....

  • Remember how far apart the stars are!

  • Well yeah but still there COULD be life on one of those and remember " We are not alone. To think that we are the only lifeforms in this galaxy is just ignorance. " Totally agree with that in all meaning.

  • Ah no, it's not an easy question at all, and thank you for raising it. 5*+Fave+playlist.

    Thank you for this brilliant video.

  • lol i thought they called our solar system

    milkey way but i was wrong

  • No, the Milky Way is actually a barred spiral. The Canis Majoris dwarf galaxy doesn't have a defined shape any more -- it's been stretched out and twisted up too much by its interaction with the Milky Way.

  • some say our solar system belongs to Sagitarius Galaxy not the Milky Way

  • lol they kept zooming in on her face AHHHHH

  • I no horrible isn't it

    lolz

  • nasa

  • (in answer to Wallidjan)

  • she has big boobs. i want her milky way. hahahahaha

  • Hahah

  • lmao

  • she is scary for some reason...

  • at every thing you look it makes you wonder, human beings are made from a tinny sperm compare that to the size of the unverse, we forget this and yet we think we are at the centre of the universe but take your time you will find there is no God But Allah and Mohammed is his messanger read the quran the answers are there. the big bang is mentioned in the Quran 1400 years ago. miracle search for self the truth

  • logic is predictable, but strings theory, nano technologies aren't in your book. We also demonstrated that we are not the center of the universe in the multiverse. Some religions doesn't think that there is only one centered thing. But definitively we are not thinking we are the center of the universe, that's wrong.

  • Part1

    Until the mid-20th century, the prevalent view across the world was that the universe was infinite, had existed forever and that it will continue to do so for all time. According to this view, known as the "static universe model," the universe had no end or beginning.

    He (Allah) is the Originator of the heavens and the earth. (Qur'an, 6:101)

  • (Part 1)

    It's amazing (I knew it, and I think no one should deny this) but there are several new ideas about it. The universe could be not infinite because nothing is immortal (only Allah) So the galaxies can flyes at any speed, there atoms aren't eternal. One day it will just stop to grew. The fact that nothing is static doesn't mean things are infinite. So to me there's kind of contradiction.

  • Part2

    Allah invites people to consider this truth in the following verse:

    Are you stronger in structure or is heaven? He built it. He raised its vault high and made it level. He darkened its night and brought forth its morning light. After that He smoothed out the earth... (Surat an Naziat: 27-30)

  • Part3

    Elsewhere it is declared in the Qur'an that a person should see and consider all the systems and balances in the universe that have been created for him by Allah and derive a lesson from his observations:

    He has made night and day subservient to you, and the sun and moon and stars, all subject to His command. There is certainly Signs in that for people who pay heed. (Surat an-Nahl: 12)

  • hey thanks for the vid

  • Our pleasure!

  • im goin to try to look for it tonight

  • and the milky way seems to have a little "snack" on canis mayoris dwarf galaxy.

  • no no no. no.

    the nearest galaxy to the milky way is the large magelhannic cloud!

  • Good nice informative video....good job and thanks

  • As always, it's our pleasure!

  • Lol, this is a stupid question but...is there other humans or species in other galaxies? LOL

  • We haven't found evidence for life anywhere but the Earth yet (though there's some hope for finding bacterial life on Mars). There are several programs that are looking, though!

  • What is that huge ball of light in the middle of spiral galaxies ?

  • That's the central core. Lots of stars very close together.

  • Also , Ive heard of white holes and worm holes , have scientists ever seen one before ?

  • Right now both are purely theoretical, but so were black holes when I was a kid.

  • Thanks man , this stuff is so interesting. And you dont have to answer this , but do YOU believe that there is a chance of a massive meteor hitting Earth anytime during the next 100 years or its just a silly made-up idea ?

  • That depends on what you consider "big." Something the size of a bus won't do much damage on a global scale, but wouldn't be much fun to have hit your house. Once a century is pretty average for that size rock. The odds go down as the size of the rock increases, but I think it's worthwhile to locate and characterize them even if the risk is low, because we don't want to be caught unaware the way the dinosaurs were...

  • could you please tell me some info

    concerning a certain planet named 'Nibiru'??

  • Nibiru is mythical. Numerous surveys have failed to find any observational evidence to support its existence.

  • This has to do with what lucasleivia siad:

    they wrote that eventually everything will pull it all in. i've heard of this. will this mean that the whol universe will become a black hole or will everything just be gone?

  • There's actually a whole *field* of cosmology dedicated to trying to determine what the end of the Universe will look like. It probably won't be a giant black hole, though, because even black holes slowly evaporate.

  • at the center of the milky way, there lies a giant massive black hole

  • please lol

  • if the universe is expanding ..... what are we expanding into...... theres a thought...any ideas

  • That would make a great doctoral dissertation... and probably win you a Nobel Prize!

  • can you answer my previous question about the "bulge"

  • in the beginning there was an infitely small point of matter surrounded by absolutely nothing forever. the thing exploded and evrything we call our universe came out of it matter and antimatter and gamma rays... this stuff was thrown out from the centre due to the explosion and is expanding out into emptyness ever since. even interstellar space contains some energy and matter, beyond the edge there is nothing thats all. gravity holds the universe together and eventually will pull it all back in!

  • if our galaxy is a spiral galaxy and our sun is out on one of the arms... the centre of the milky way seems to be a huge bulge much brighter and super massive compared to our sun... why cant we see it ??

  • The center of our galaxy is shrouded behind a cloud of dust. Google the Spitzer Space Telescope or the 2MASS project for good images through the dust.

  • wow thats so amazing i dont know if this has to do anything with astronamy but is time real or is it just something used by humans to understand stuff plz answer

  • According to the Special Theory of Relativity, time is a physical dimension just like length, width, and height. How it relates to what we perceive as "time passing" is the subject of a lot of ongoing research and debate...

  • The way we measure time is man-made. There's no universal time scale. It's are all relative to our position , gravity, and speed relative to other objects.

    Time is a 'real' thing. If you could step out of the third dimension and look down on it from the fourth, you would look like a long snake with your embrionic self at one end, and your deceased self at the other. Like taking a photograph of something moving. It will smudge. Make the exposure long enough, thats seeing in 4D!

  • Anromeda galaxy get off your fat ass and collide with our milky way already!

  • I think she might be a reptoid.

  • rofl

  • WOW

  • so, see if we found a reflective surface lightyears away, then if we designes an insane telescope, we could see the past ,right?

  • In a very abstract sense, yes. The engineering on something like that would be, well, daunting...

  • I like the funny pictures and the cool com graphics in these series :)

  • I am amazed that light from a galaxy 2 million light years away is still visable. Considering the emittion occurred 2 million years ago, I just cam't imagine that the light would still exist over this long period of time. If this is true, a super telescope from another galaxy can look towards earth and be looking at dinosaurs right now even though they are extinct?

  • That's right. If some alien civilization had a telescope that could resolve the surface of the earth, they'd see it as it looked in our past, not as it looks in our present.

  • that sounds interesting =]

  • Space is empty. Light can travel for billions of years, uninturrupted. Unless of course it hits some gas from a nebula or something, but remember light travels in a sphere, so even though it may not reach earth, it will still be seen from other points in the universe.

  • Space is not empty. There is space gas everywhere. And lights travel according to physical and gravitational laws. And if it doesn't reach you, you don't see it.

    Few ideas, and very confused :-)

  • Absolutely incorrect. This is what we used to call 'ether'. Space does not have 'gas everywhere' as you describe. If it did, we would not be able to see the light from Galaxies that are millions (Let alone 28 Billion) light years away, because the light would be diffused by the gas. But keep on truckin'!

  • my grammar sucks please excuse it

  • not entirely true. the closest galaxy to the milkey way is actually these very dwarf galaxies. two of which are colliding with us at this moment...

  • oh when i stated this i didnt see the rest of this video. sorry. lol

  • no i mean think about it pluto is no longer a planet becuase its dwarf planet so those galaxys of which u mentioned are too tiny its justl ike vidoe game before u fight thel ast boss u sometimes fight a mini-boss

  • In the nam of allah

    [37] When the sky is rent asunder, and it becomes red like ointment:

    [38] Then which of the favours of your Lord will ye deny?

    [39] On that Day no question will be asked of man or Jinn as to his sin,

    [40] Then which of the favours of your Lord will ye deny?

    [41] (For) the sinners will be known by their Marks: and they will be seized by their forelocks and their feet.

  • Everyone, please be nice.  I don't like needing to delete comments. You're free to disagree, but don't resort to name-calling.

  • Git 'em!lol

  • The one only Holy book which connected to the galaxy and the universe is Qur'an..

  • watch zeitgeist part 1 then tell me what you think

  • I agree with what seabrain said. There is so much knowledge out there about the universe. For parents to not teach their kids or to not let them read about the universe rather than the holy texts is a great injustice to learning.

  • Very interesting. I knew the Andrometer was the closest, though had no idea of the other two smaller galaxies.

    Good video.

  • I wish children would be sitting in awe of this and learning about science, like I did, instead of sitting in a church being guilt-ridden and indoctrinated by ignorant religious lunatics.