Galaxies

What once appeared to be an unremarkable star among billions in the Whirlpool Galaxy has vanished in a brilliant supernova

                          The Andromeda galaxy holds a particular fascination.

The big bang should have distributed matter evenly throughout the universe. So why is there a big dense spot?

A huge cloud of plasma south of our galactic black hole could be evidence of a past feeding frenzy. John Matson reports

The damaged Kepler spacecraft's operating capability is much lower than expected, officials say

Amateur stargazers can see a rainbow of star colors in the night sky this summer

Astronomers speculate that a supermassive black hole in a distant galaxy may have been spit out from the collision of two other galaxies

The newly discovered moon is the 14th in Neptune's orbit

The black hole in galaxy NGC 1277 is way more massive than usual. Astronomers hypothesize it was ejected from another galaxy before settling in its new home. John Matson reports

A greener fuel "less toxic than caffeine" could replace NASA's dangerous hydrazine rocket propellant

Even with the loss of its precision pointing ability, Kepler can still search for exoplanets, scientists say

A new telescope array reveals a gas cloud forming a star perhaps 100 times as massive as the sun