A cornerstone of Milky Way history may need rewriting with evidence of multiple ancient mergers

Astronomers may have uncovered new details about one of the Milky Way's most important ancient collisions. Using data from ...

Can the cataclysmic explosions of dying stars help unlock grand mysteries of the universe?

Once charted as a 'guest star' in ancient China, dreaded as a harbinger of ill omens in medieval Europe, and preserved in the ...