If they merge in 7 billion years, I wouldn't count a collision in year 13 billio...

		lIl-IIIl 3 months ago \| parent \| context \| favorite \| on: New study casts doubt on the likelihood of Milky W... If they merge in 7 billion years, I wouldn't count a collision in year 13 billion as a result of colliding galaxies. It would be just a normal behavior of stars colliding in the new galaxy that was formed.

Well, you certainly should—that's how causation works.