A new study, based on a census of stars in the Milky Way, suggests those periods of severely cold climates may have begun with stars dying light-years away. "If a massive star were to explode as a ...

as opposed to the fingerprint of that light from the host star," Balmer added. The incredible snapshots provided astronomers with a clear look at the presence of CO2 in the distant exoplanets ...

Most people know the theory that an asteroid smashed into Earth — hitting what is now the Yucatán Peninsula — and killed off ...

A supernova is a cataclysmic stellar death that leaves behind a black hole or neutron star. It is the biggest, brightest, and most violent type of explosion scientists have observed in the universe.