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LaurenG

(24,841 posts)
Fri Jun 1, 2012, 11:29 AM Jun 2012

The end of the galaxy as we know it?

Our Milky Way galaxy is an anomaly in more ways than one. And now, NASA scientists say they know exactly when it will come to an end.

In a universe that is forever spreading apart, the Milky Way has been moving closer to celestial neighbor the Andromeda galaxy. But whether we are in for intergalactic Armageddon or an extraterrestrial fender bender has been a mystery -- until now.

"Very interestingly, we find that Andromeda galaxy does appear to be coming straight at us," said Roeland van der Marel, an astronomer at the Space Telescope Science Institute in Baltimore. He was scheduled to speak at a NASA press conference Thursday.

The discovery was made thanks to images taken over the 22-year lifespan of the Hubble Space Telescope. But the quest to determine the Milky Way galaxy's expiration date has been undertaken by astronomers for more than 100 years. Now, for the first time, NASA scientists say they know "with certainty" when our beloved galaxy will cease to exist as we know it, what it will look like and how it will happen.



Read more: http://www.wcpo.com/dpp/news/science_tech/the-end-of-the-galaxy-as-we-know-it#ixzz1wYWrhAY4



9 replies = new reply since forum marked as read
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The end of the galaxy as we know it? (Original Post) LaurenG Jun 2012 OP
Fascinating! CrispyQ Jun 2012 #1
Don't worry. Within 1 billion years the heat on Earth will have already killed all living things. n ladjf Jun 2012 #2
one hopes by then qazplm Jun 2012 #3
I like your optimistic view. nt ladjf Jun 2012 #6
It's amazing that galaxies can pass through each other with few solar collisions. JohnnyRingo Jun 2012 #4
Well, there goes the neighborhood Warpy Jun 2012 #5
"It's coming right for us!" krispos42 Jun 2012 #7
LOL deutsey Jun 2012 #8
Oh, why all the doom and gloom about death and non-existence. gtar100 Jun 2012 #9

qazplm

(3,626 posts)
3. one hopes by then
Fri Jun 1, 2012, 12:46 PM
Jun 2012

we will have moved on to bigger and better things

Or the sentient cockroaches will have, either way...

JohnnyRingo

(18,700 posts)
4. It's amazing that galaxies can pass through each other with few solar collisions.
Fri Jun 1, 2012, 12:59 PM
Jun 2012

But it has happened again and again throughout time.

As it was explained in "Cosmos" by Carl Sagan, if we could shrink our galaxy down to the size of a quarter, the nearest galaxy would be a mere couple feet away on the table. If we shrunk our sun to the size of a quarter, the nearest star would be over 400 miles away.

Though galaxies appear too dense to inter-mesh, it's because of their grand scale that we view them as near solid objects.

There is no star visible in the night sky that is from outside the Milky Way, and there are more stars in the known universe than there are grains of sand on every beach on Earth.

Sagan did not believe we've been visited by inhabitants from any of those distant stars. He always attributed sightings to people who didn't understand what they were looking at. As evidence he pointed out that there is one type of person who never sees flying saucers: astronomers, and they spend their entire lives staring up into the night sky.

Warpy

(111,480 posts)
5. Well, there goes the neighborhood
Fri Jun 1, 2012, 01:07 PM
Jun 2012

The only beings left to see it will be bacteria on the outer planets, if they're still warm enough to support it and my guess is that life will be tough enough for them that they won't care.

What might happen is that our sun, by then a burned out white dwarf, might get a companion star and begin the process of turning into a powerful supernova, creating all the building blocks that will form life in a new system billions of years down the long road of the universe.

The galaxy itself will just look a lot less tidy, the flat whirpool of stars that looks so beautifully orderly to us now becoming a disarrayed mess with stars going every which way, the galactic equivalent of a neighborhood with overgrown grass, car bodies and derelict appliances littering the yards.

What science doesn't yet know is if the two galaxies will sort themselves out into a larger spiral galaxy or if it will become a massive globular cluster of stars. All we can see now are galaxies in the process of colliding and we don't live long enough to see what happens later.

gtar100

(4,192 posts)
9. Oh, why all the doom and gloom about death and non-existence.
Tue Jun 5, 2012, 04:50 AM
Jun 2012

All is change and transformation. Andromeda will not zap the Milky Way and make it disappear. The two galaxies will be integrated. Cool enough. I think we should make plans to move into the new neighborhood. It's inevitable. We aren't going away, we just may have to take on a new name as star clusters mingle.

Then again, if we truly want to avoid this fate, our best chance is to send audio and video of our tea-baggers, conservatives, republicans and fundamentalists. If they knew that these sorts of things existed in an otherwise ordinary galaxy, they may just decide to change course and avoid us all together.

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