Astronomers observe two stars so close to each other that they will end up merging into a supermassive star

5 December 2014

A study of “MY Camelopardalis” binary system shows that the most massive stars are made up by merging with other smaller stars, as predicted by theoretical models.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/b6tw9lrUkyI/141205093754.htm