Q&A: Milky Way Galaxy
If the Milky way is 50 percent more massive then previously thought, by how much will that decrease the time before we approach, collide with Andromeda?
Thanks for the question, which is a good one. They don't mention in the
press release how much sooner they think the collision will occur, but I
found this explanation in an article in Science News:
"The more mass in the big galaxies - the Milky Way and Andromeda - ... the
sooner they will collide," says Reid. Researchers had previously
calculated that the two galaxies will merge in about 5 billion years. Reid
says he is not certain exactly how much sooner the two giants
would collide because the full three-dimensional motion of each galaxy has
not yet been determined. A heavier Milky Way might also have a
greater retinue of satellite galaxies - tiny galaxies, like the Large and
Small Magellanic clouds - that orbit it, he adds.
In other words, they haven't estimated a time yet.
You can see the full article at: