Astronaut feels space's toll on his body

Hubble Telescope Spies Milky Way Galaxy's Twin

Mission to land on a comet

"Most Amazing Earth Image" From the Other Side

Signs of Ancient Ocean on Mars Spotted by European Spacecraft

Mars 'Super-Drought' May Make Red Planet Too Dry for Alien Life

Opinion: Is returning to the moon really such a crackpot idea?

"A Cloud of Hundreds of Trillions of Asteroids and Comets Surrounds the Milky Way's Black Hole"

Astronaut feels space's toll on his body

Two Earth-Size Planets Born of Battered "Jupiter"?

50 million years ago, this boulder rolled across the moon’s surface

NASA Eyes Plan for Deep-Space Outpost Near the Moon

Phantom Black Holes of the Milky Way --Could They Pose a Danger to Our Solar System?

NASA: "The Conditions for the Emergence of Life were Present on Mars — Period, End of Story"

Putting the squeeze on planets outside our solar system

Most Extreme Human Spaceflight Records

Rare Earth element tellurium detected for the first time in ancient stars

This Is the Center of the Universe: NASA’s Deep-Space Command Central