much more:Many stars in our galaxy exist in pairs, but our Sun is a notable exception. Now scientists are finding clues that it may once have had a companion of its own. The question is, where did it go?

Our Sun may once have had a twin. What happened to this stellar sibling?
Many stars in our galaxy exist in pairs. Now scientists are finding clues that our Sun may once have had a companion of its own. The question is, where did it go?
