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Fraser
2008-Jan-11, 06:10 PM
Don't panic, but there's a giant cloud of hydrogen gas on a collision course with the Milky Way. When it hits, 40 million years from now, it should generate vast regions of star formation. In fact, we don't even need to wait; the leading edge of this gas cloud is already starting to interact with [...]

More... (http://feeds.feedburner.com/~r/universetoday/pYdq/~3/215109765/)

Trakar
2008-Jan-11, 08:33 PM
Don't panic, but there's a giant cloud of hydrogen gas on a collision course with the Milky Way. When it hits, 40 million years from now, it should generate vast regions of star formation. In fact, we don't even need to wait; the leading edge of this gas cloud is already starting to interact with [...]

More... (http://feeds.feedburner.com/~r/universetoday/pYdq/~3/215109765/)

So we get to "bulk up" a bit prior to our merger with Andromeda.

Noclevername
2008-Jan-11, 10:40 PM
What part of the MW is it going to hit? Near us, or partway around the disk? (or the top or the bottom)

Trakar
2008-Jan-12, 05:31 PM
What part of the MW is it going to hit? Near us, or partway around the disk? (or the top or the bottom)

The NPR science Friday piece about it I heard yesterday mentioned that the impact is projected about 1/4 of the way around the Galaxy. It should be visible to anyone here 20-40Myears from now, but not a direct threat.

Of course, its suggested it will create a bunch of large, short-lifecycle stars as it interacts with the MW. To me that says a lot of short period SNs and HNs within the first Billion years from this sector of the Galaxy, with corresponding GRB jets stabbing out into the neighborhood.

'm actually of the opinion that this type of effect along with galactic mergers which trigger similar jets from core BHs could be a significant factor in answering Fermi's paradox. Hostile universe senario. Its rare, especially in the past, that a given region of the galaxy stays clam enough, for long enough, to spawn life and give it the opportunity to develop into advanced tech civs.