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[Wired] Astronomers Discover Millions of New Black Holes and a Rare Type of Galaxy

post #1 of 149
8/29/12 at 1:00pm
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Quote:
Originally Posted by Wired .com 
NASA’s Wide-field Infrared Survey Telescope (WISE) has uncovered millions of supermassive black holes in our universe as well as a strange new type of galaxy, called a hot DOG or dust-obscured galaxy.

“This is a jackpot of black holes, two to three times more than have been found by any other survey,” said astronomer Daniel Stern, during a NASA press conference today.

By carefully scanning the entire night sky in infrared wavelengths, WISE has spotted more than 2.5 million black holes, all of them actively feeding on gas and dust in their host galaxies. Most of these supermassive objects, known as quasars, are roughly 10 billion light-years away.

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post #2 of 149
8/29/12 at 1:16pm
10 billion light years away, I can't even understand that distance..
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post #3 of 149
8/29/12 at 1:26pm
Quote:
Originally Posted by kpriess View Post

10 billion light years away, I can't even understand that distance..

It would take you 10 billions years to get there if you could go at the speed of light, which results into this math :

Knowing that the speed of light is 1,079,252,848.8 kilometres per hour.

10,000,000,000 * 1,079,252,848.8 = 107 925 248 480 000 000 000 000 000 000 Kilometers from earth.

*Note : Speed of light is relative since we are now aware that some denser elements accelerate/slowdown the light.
Edited by Abs.exe - 8/29/12 at 1:28pm
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post #4 of 149
8/29/12 at 1:34pm
Quote:
Originally Posted by Abs.exe View Post

It would take you 10 billions years to get there if you could go at the speed of light, which results into this math :
Knowing that the speed of light is 1,079,252,848.8 kilometres per hour.
10,000,000,000 * 1,079,252,848.8 = 107 925 248 480 000 000 000 000 000 000 Kilometers from earth.
*Note : Speed of light is relative since we are now aware that some denser elements accelerate/slowdown the light.
Yay for answering a "this number is hard to imagine" comment with a number that is even harder to imagine tongue.gif

Also this part is interesting:
“We may be seeing these galaxies at a crucial transformational stage, like watching a butterfly emerging from its cocoon,” said astronomer Rachel Somerville from Rutgers University during the conference.

Except that what they're seeing happened 10 billion years ago, it's impossible to verify the current state of those galaxies/black holes o_O
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post #5 of 149
8/29/12 at 1:37pm
Quote:
Originally Posted by Tippy View Post

Yay for answering a "this number is hard to imagine" comment with a number that is even harder to imagine tongue.gif
Also this part is interesting:
“We may be seeing these galaxies at a crucial transformational stage, like watching a butterfly emerging from its cocoon,” said astronomer Rachel Somerville from Rutgers University during the conference.
Except that what they're seeing happened 10 billion years ago, it's impossible to verify the current state of those galaxies/black holes o_O

Doesn't change the fact that the observations teams are seeing it happen, right now. It's obvious that it isn't happening now, but they are observing the galaxies during an apparently crucial point.
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post #6 of 149
8/29/12 at 1:43pm
God I love science. I wish we could go the speed of light; if not faster. sad-smiley-002.gif
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post #7 of 149
8/29/12 at 1:45pm
Quote:
Originally Posted by Abs.exe View Post

Quote:
Originally Posted by kpriess View Post

10 billion light years away, I can't even understand that distance..

It would take you 10 billions years to get there if you could go at the speed of light, which results into this math :

Knowing that the speed of light is 1,079,252,848.8 kilometres per hour.

10,000,000,000 * 1,079,252,848.8 = 107 925 248 480 000 000 000 000 000 000 Kilometers from earth.

*Note : Speed of light is relative since we are now aware that some denser elements accelerate/slowdown the light.

10 billion light years away at the time that light was emitted, based on the observation that almost all galaxies are moving away from each other, it's probably much further away than that now. As you travelled towards it at the speed of light, it would still appear to not be getting closer to you at the speed of light, the result being that after 10 billion years of light speed travel it would still be quite far away from you.

It's insane to think about it, but the Voyager satellite, sent out in the late 70's, and has been travelling multiple times faster than a bullet from a gun, for 30+ years, has only travelled about 16 light hours. Now imagine what a light day, month, or year is. And now imagine what 10 billion light years are.

The scale of space is absolutely insane. Here's something to blow your mind. If the visible universe were the size of Earth, then our solar system would be the size of a dust particle, and Earth would be 1/180th the size of a single atom.
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post #8 of 149
8/29/12 at 2:36pm
Quote:
Originally Posted by Shmerrick View Post

God I love science. I wish we could go the speed of light; if not faster. sad-smiley-002.gif
It would have to be billions of times faster than light to get anywhere in respectable time frames. Traveling at *just* light speed would still be pathetically snail-paced, it would take 4 years just to reach the nearest star to our solar system and 1000 years just to leave our own galaxy (taking the shortest way out of the Milky Way's disc shape, travelling "upwards").

It's safe to say we're TRAPPED in our own galaxy by the sheer vastness and emptyness of space, the laws of physics won't allow us to get out for milennia to come. If we could place telescopes out of the Milky Way our view of the universe would expand a thousand-fold. What we can see now is heavily blocked-off by stuff like gigantic clouds/nebulae/star clusters/galactic center/etc, we have to rely on infrared/gamma/etc rays to "see" distant objects.
Scientists say we can only visually see 1% of the universe from where we are.
Edited by Tippy - 8/29/12 at 2:42pm
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post #9 of 149
8/29/12 at 2:45pm
Quote:
Originally Posted by Tippy View Post

Quote:
Originally Posted by Shmerrick View Post

God I love science. I wish we could go the speed of light; if not faster. sad-smiley-002.gif
It would have to be billions of times faster than light to get anywhere in respectable time frames. Traveling at *just* light speed would still be pathetically snail-paced, it would take 4 years just to reach the nearest star to our solar system and 1000 years just to leave our own galaxy (taking the shortest way out of the Milky Way's disc shape, travelling "upwards").

It's safe to say we're TRAPPED in our own galaxy by the sheer vastness and emptyness of space, the laws of physics won't allow us to get out for milennia to come. If we could place telescopes out of the Milky Way our view of the universe would expand a thousand-fold. What we can see now is heavily blocked-off by stuff like gigantic clouds/nebulae/star clusters/galactic center/etc, we have to rely on infrared/gamma/etc rays to "see" distant objects.
Scientists say we can only visually see 1% of the universe from where we are.

Not only that, the galaxies that are even considered "near" us are accelerating away from us at amazing speeds, increasing by powers (exponents).

And we'll probably never be able to travel as fast as light. The less mass, the faster it can go and IIRC photons don't have any mass...I think.
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post #10 of 149
8/29/12 at 2:50pm
Its awesome to think that alien lifeforms could be currently observing our galaxy and watching it form. Just imagine these life forms watching when the suddenly pick up messages by Voyager 1 and are able to trace it back to Earth. BEFORE they even see any planets created in our galaxy. Pretty crazy if you think about it.
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