Closest, brightest supernova in decades is also a little weird

A bright supernova discovered only six weeks ago in a nearby galaxy is provoking new questions about the exploding stars that scientists use as their main yardstick for measuring the universe.

Approaching comet may be brightest in a century

A newly-discovered comet looks likely to blaze brightly in our skies late next year.

Brightest supernova in 40 years appears

Berkeley scientists this week discovered a new supernova, closer to Earth than any seen in the last 40 years, and believe they've spotted it within hours of its explosion.