Galaxy collisions the Milkyway and andromada.


log in

Advanced search

Message boards : SETI@home Science : Galaxy collisions the Milkyway and andromada.

Author Message
Larry Monske
Send message
Joined: 17 Sep 05
Posts: 262
Credit: 524,627
RAC: 46
United States
Message 1326545 - Posted: 11 Jan 2013, 4:23:33 UTC

As you might well we see many galaxies interacting collideing and coeless into larger galaxy. Our own Milkyway is headed for a head on collion with Andromada in 3 billion years. Looking for habital planets in our own galaxy is a waste of time. Our much smaller milkyway will be ripped apart and stars will be slung out or into the middle of this train wreck. That will continues churning up new stars and old are consumed by the new andromada. We have only 3 billion years to find another earth but outside our own galaxy. So consuming all your time and effort to find habital planets in our own galaxy is a waste. It will take millions of years to travel to another galaxy but we have to start looking at how we can ensure mankind will survive.

Profile Michel448a
Volunteer tester
Avatar
Send message
Joined: 27 Oct 00
Posts: 1201
Credit: 2,891,635
RAC: 0
Canada
Message 1326630 - Posted: 11 Jan 2013, 8:16:10 UTC - in response to Message 1326545.
Last modified: 11 Jan 2013, 8:16:23 UTC

We have only 3 billion years to find another earth.


^^
____________

Profile Allie in Vancouver
Volunteer tester
Avatar
Send message
Joined: 16 Mar 07
Posts: 3949
Credit: 1,604,668
RAC: 0
Canada
Message 1326750 - Posted: 11 Jan 2013, 18:48:40 UTC

Our Galaxy is actually the larger of the two.

And remember that even in a Galaxy, it is mostly empty space. Actual collision between stars is rather unlikely.
____________
Pure mathematics is, in its way, the poetry of logical ideas.

Albert Einstein

Profile ignorance is no excuse
Avatar
Send message
Joined: 4 Oct 00
Posts: 9529
Credit: 44,433,274
RAC: 0
Korea, North
Message 1328052 - Posted: 16 Jan 2013, 20:22:28 UTC - in response to Message 1326750.

considering the gravity involved the a collison is essentially unlikely or almost impossible for solar systems to collide. Look at our own Galaxy. you dont see any evidence of collisions even though the bands collide and recombine galactically often.
____________
In a rich man's house there is no place to spit but his face.
Diogenes Of Sinope

End terrorism by building a school

Profile Bob DeWoody
Avatar
Send message
Joined: 9 May 10
Posts: 1365
Credit: 547,225
RAC: 272
United States
Message 1328185 - Posted: 17 Jan 2013, 6:06:25 UTC

I have seen or read that there is evidence that the Milky Way has absorbed several smaller Galaxies in the past. I think also that you will find that the andromeda galaxy is the larger of the two by a big margin. But what does any of this have to do with searching for new planets to populate? Our sun will most likely be history before the Milky Way and Andromeda merge.
____________
Bob DeWoody

My motto: Never do today what you can put off until tomorrow as it may not be required.

Profile Allie in Vancouver
Volunteer tester
Avatar
Send message
Joined: 16 Mar 07
Posts: 3949
Credit: 1,604,668
RAC: 0
Canada
Message 1328383 - Posted: 17 Jan 2013, 20:09:44 UTC - in response to Message 1328185.
Last modified: 17 Jan 2013, 20:13:17 UTC

I have seen or read that there is evidence that the Milky Way has absorbed several smaller Galaxies in the past. I think also that you will find that the andromeda galaxy is the larger of the two by a big margin. But what does any of this have to do with searching for new planets to populate? Our sun will most likely be history before the Milky Way and Andromeda merge.


Andromeda Galaxy

About 1/3 the way down the Mass and Luminosity Estimates section:

. . . M31 may be less massive than our own galaxy, although the error range is still too large to say for certain. Even so, the masses of the Milky Way and M31 are comparable. . .


As I stated in a previous post, the galaxies are roughly the same size with our galaxy probably having a slight edge. I do actually research this stuff before I post it. Others . . not-so-much :P
____________
Pure mathematics is, in its way, the poetry of logical ideas.

Albert Einstein

Profile Bob DeWoody
Avatar
Send message
Joined: 9 May 10
Posts: 1365
Credit: 547,225
RAC: 272
United States
Message 1329779 - Posted: 21 Jan 2013, 7:17:35 UTC - in response to Message 1328383.
Last modified: 21 Jan 2013, 7:18:03 UTC

I do too! My sources list Andromeda as having an estimated trillion stars whereas the Milky Way is estimated to have between 100-400 billion stars and their masses are estimated to have about the same proportions. I guess the uncertainty is great enough to cause somewhat different estimates from different sources.

But I stand by my original conclusion that we (humans) don't have anything to worry about from the expected galactic collision and it's impact on our solar system for a very long time and that if we develope the capability for interstellar travel our fate will be in our own hands.
____________
Bob DeWoody

My motto: Never do today what you can put off until tomorrow as it may not be required.

Profile Allie in Vancouver
Volunteer tester
Avatar
Send message
Joined: 16 Mar 07
Posts: 3949
Credit: 1,604,668
RAC: 0
Canada
Message 1329823 - Posted: 21 Jan 2013, 14:37:47 UTC - in response to Message 1329779.
Last modified: 21 Jan 2013, 14:50:34 UTC

I do too! My sources list Andromeda as having an estimated trillion stars whereas the Milky Way is estimated to have between 100-400 billion stars and their masses are estimated to have about the same proportions. I guess the uncertainty is great enough to cause somewhat different estimates from different sources.

But I stand by my original conclusion that we (humans) don't have anything to worry about from the expected galactic collision and it's impact on our solar system for a very long time and that if we develope the capability for interstellar travel our fate will be in our own hands.


Agreed (on the don't worry about it) idea. The two galaxies are comparable in mass and, when it comes to collisions, mass is everything Agree to disagree on the size estimates. :)
____________
Pure mathematics is, in its way, the poetry of logical ideas.

Albert Einstein

Profile William Rothamel
Avatar
Send message
Joined: 25 Oct 06
Posts: 2465
Credit: 1,171,859
RAC: 109
United States
Message 1329827 - Posted: 21 Jan 2013, 15:13:35 UTC - in response to Message 1329823.

The eventual collision will probably not involve any objects (stars, planets) actually hitting each other.

Profile Julie
Volunteer moderator
Volunteer tester
Avatar
Send message
Joined: 28 Oct 09
Posts: 18603
Credit: 3,362,389
RAC: 6,555
Belgium
Message 1331535 - Posted: 26 Jan 2013, 10:47:50 UTC

No, the Milkyway and Andromeda will just become 1 large galaxy...
____________


rOZZ

Larry Monske
Send message
Joined: 17 Sep 05
Posts: 262
Credit: 524,627
RAC: 46
United States
Message 1333869 - Posted: 2 Feb 2013, 6:40:35 UTC - in response to Message 1331535.

This collision will scatter stars over thousands of light years. It will require a million years to develope enough to achieve interstellar travel. Our sun and planet can change orbits immensely gravity of the largest wins.

Larry Monske
Send message
Joined: 17 Sep 05
Posts: 262
Credit: 524,627
RAC: 46
United States
Message 1337633 - Posted: 13 Feb 2013, 5:29:33 UTC - in response to Message 1333869.

I can only imagine the gravitional tug of war with nearby stars slung into new orbits. Then again we might peaceibily merge, but we are in the outskirts of the milkyway and most reasonible to be slung lightyears from where we were. Three billion years sounds so far away but think it will take a million years to travel to another galaxy. Its a roll of the dice do you stay or leave.

Message boards : SETI@home Science : Galaxy collisions the Milkyway and andromada.

Copyright © 2014 University of California