What happens to the planets in a galaxy when that galaxy collides with another galaxy?

a) They are pulled out of their orbits by the tidal forces of the intruding galaxy.
b) Smaller stars collide with each other, forming more massive stars which swallow the planets.
c) Nothing, because the spaces between stellar systems in a galaxyis much larger thantheir size.
d) They accrete a whole lot of new matter and become stars themselves.
e) They ignite completely and explode violently.


Ans: c) Nothing, because the spaces between stellar systems in a galaxyis much larger thantheir size.

Physics & Space Science

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