An odd-looking rock appeared before NASA's Opportunity Rover on Mars, in a spot where, 13 days earlier, there was nothing.
Why isn't a meteorologist someone who studies meteors, and other questions from a cold snap.
A bright distant quasar illuminating a massive nebula for the first time reveals 'cosmic web' of filaments thought to connect galaxies, say scientists
Rosetta, a dormant billion-dollar comet-chasing spacecraft, is all set to wake up. If its mission is successful, it will help scientists learn more about comets and their composition.
The planet, which astronomers detected with a powerful telescope in Chile, is roughly a third of the size of Jupiter.
NASA's Hubble Space Telescope has taken the deepest view yet of the gassy, dusty, Tarantula Nebula, located some 160,000 light-years away.
An expected collision between a gas cloud and a supermassive black hole at the center of our Milky Way will help us better understand the evolution of the entire galaxy, say scientists.
Astronomers say they've spotted a new class of stars speeding to the galactic exit, but not flung out from the galactic core by a black hole. Their origin and the reason for their haste are mysteries.
Hand of God: NASA's Nuclear Spectroscopic Telescope Array has spotted a pulsar wind nebula that resembles a gigantic ethereal right hand.
Aurora Borealis: A powerful solar flare is shaking up the Earth's magnetic field, producing a light show in the sky for much of North America.