First observed interstellar object is a speedy, cigar-shaped asteroid
It has been traveling for hundreds of millions of years.
Long-delayed Thirty Meter Telescope gets the go-ahead, for now
Protesters vow to keep fighting its construction.
Hubble telescope spots evidence of water on Trappist-1 planets
There's a very slim chance the planets are habitable.
Early universe 'fireworks' challenge notions of how stars form
The ancient cosmos may have been packed with tiny star incubators.
Current theories might be wrong about how a galaxy evolves
A dead galaxy discovered with the Hubble telescope doesn’t fit with current understandings.
Stars can turn into black holes without a supernova
Our assumptions about star death might be misguided.
Hubble telescope spots 'runaway' black hole
The black hole, shot out of a distant galaxy, is the first of its kind.
NASA plans to make a telescope out of the Sun
But there is a catch.
Universe may hold 10 times more galaxies than once thought
We just can't see most of them.