The planet is in its star's habitable zone, and there's a "better than even" chance that it's rocky.
If you haven't heard, Pluto is really, really tiny.
After a long and suspenseful saga, Philae has fallen silent once again. The lander, which touched down on a comet at November 12 of...
NASA's groundbreaking mission revealed carbon monoxide ice in the heart-shaped structure.
Pluto may be host to water ice structures as large as the Rocky Mountains.
Even when it was officially a planet, Pluto was always the underdog, as it was the smallest and furthest away of the nine planets in...
New Horizons has traveled 3 billion miles to make its closest approach to the former ninth planet.
New Horizons switches into "flyby mode" for its July 14th close encounter.
New Horizons will make its approach to our former ninth planet on July 14.
It is essentially common knowledge in this day and age that phenomena in space can play a significant role in shaping life on earth....
The study of Philae's comet will continue for an additional nine months.
The Phoebe ring is seven thousand times the size of Saturn itself.
The first model of the night sky was made in the Bronze Age.
We can now see Ceres's white spots very clearly, but scientists are still mystified as to what they are.
Astronomers honored the late and great Spock with his very own asteroid.
Amazing video explains how Hubble may detect alien life in the near future.
Pluto's weird moon Nix is not only shaped like an egg, it jerks and tilts crazily as it orbits.
The President of the United States gave his stamp of approval to this glittering star cluster.
What if the Andromeda Galaxy, the Crab Nebula, or a black hole were right next to us?
More than six months after Philae's historic landing, Rosetta sends back pictures of the comet's surface landscape and faraway...