Some of the universe's most extreme explosions leave behind almost no trace. The original explosion is unseen, but our observations can capture the long-lived echo it leaves behind as the shock front ...

Astronomers have witnessed one of our universe's biggest stars transforming into a rare stellar body, and the dramatic metamorphosis may be the prequel to a powerful supernova explosion that sees this ...

The night sky promises Seattle an array of celestial wonders this year, one of which is a six-planet parade Saturday. It’s hard to articulate what exactly it is about the night sky that we find so ...