Tuesday, May 14, 2013

Galaxy Collision - another APOD Wow!

Artist view of Milky Way and Andromeda colliding in 3.75 billion years from now
Image NASA

Space Theology bookmark May 14 2013 Galaxy collision

Rarely one can see such a spectacular demonstration of the educational power of computer modeling with real life photography!

Personally I had always - wrongly - assumed that the collision of two galaxies means widespread destruction of stars and planetary systems around them.

Instead "Since galaxies are mostly empty space, no internal stars are likely to themselves collide. Rather the gravitation of each galaxy will distort or destroy the other galaxy, and the galaxies may eventually merge to form a single larger galaxy... Our own Milky Way Galaxy has absorbed several smaller galaxies during its existence and is even projected to merge with the larger neighboring Andromeda galaxy in a few billion years."

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