A rock collected by the Apollo 17 mission in 1972 yields a surprise.
The Swift satellite, NASA's high-energy detector, is studying black hole mysteries.
In a nebula packed with stars, not all stay with the crowd.
Asteroids may have delivered water to early Earth.
NASA's Solar Dynamics Observatory is the most advanced solar imager ever built.
Satellites go wide, then zoom in on galactic dust.
Ancient quartz crystals reveal our young planet's magnetic field.
Astronomers get a fresh perspective on the Orion Nebula.
Hubble is watching seasons change on the dwarf planet.
Hubble’s new infrared camera has captured the most distant, ancient galaxies ever seen.