Earth's ozone layer still in trouble, study finds

'Oumuamua, the bizarre cigar-shaped interstellar object, is actually a comet

'Blood moon' eclipse will be century's longest

Fermi paradox solved? There's no intelligent life in universe, say researchers

Mysterious blue dune spotted on Mars

Beauty of the Milky Way captured in a crystal ball

Asteroid with a 13-mile-high mountain is now visible to the naked eye

A 10-day trip to the ISS will cost you $55 million

Scientists find 'weird' objects hanging around the heart of our galaxy

Clouds of spinning diamonds linked to Milky Way mystery

The controversy behind the world's next great telescope

Mars is about to shine brighter than any time since 2003