Stars can turn into black holes without a supernova
Our assumptions about star death might be misguided.
Construction starts on the world's largest optical telescope
The Extremely Large Telescope has been years in the making.
Live look at the 'alien megastructure' star may solve mysteries
It's a rare chance to look at the star's strange behavior while it's happening.
Earth's radio signals may be protecting it from space radiation
Take that, Van Allen belts
Most habitable planets may be completely covered in water
Simulations suggest that Earth's ideal mix of land and sea is rare.
Nearby 'super-Earth' may be our best shot yet at finding alien life
LHS 1140b is in just the right orbit for atmospheric studies.
How NASA's future robots will explore frozen worlds
Yes, there will be harpoons.
One of Jupiter's asteroid 'moons' is orbiting backwards
It's defying all expectations.
Hubble telescope spots 'runaway' black hole
The black hole, shot out of a distant galaxy, is the first of its kind.