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Violent Galactic Clash May Solve Cosmic Mystery
astroengine writes "The mother of all cosmic collisions has been spotted between two galaxies containing a total of 400 billion stars, igniting the birth of 2,000 new stars per year! This incredible event was first spotted by the recently-retired Herschel infrared space observatory (abstract), a mission managed by the European Space Agency. This violent discovery isn't just awesome to look at, it could also help explain how massive, red elliptical galaxies evolved in the early universe."
Most likely none. When galaxies "collide", they merge gravitationally, but stars don't run into one another. Thing of how small a star is compared to the vast space between them. The odds of two stars colliding are so small, even when you have literally billions of them heading towards one another, the odds of a collision are extremely remote.
"Convictions are more dangerous enemies of truth than lies."
All you need is something massive to move through the asteroid belt for a number of asteroids to get scattered across our solar system like someone breaking open a game of pool. The net result is that one of those astroids will hit likely hit us or hopefully the moon.
You'd also be assuming that the moons orbit doesnt change drastically. That may have some fundamental change in forces which might not affect the oceans but it would most likely result in a large number of earthquakes as the system tries to find some new balance between the new orbit and the internal spin of the earth vs the crust.