Crater Melanthius on Tethys
Cassini took this photograph of the 245-km (150-mile) crater Melanthius on the surface of Saturn's moon Tethys. The central mountains…
Did the Earth Flip Over in the Past?
Scientists have found evidence that the Earth might have flipped over in the past, completely shifting the orientation of its…
Magnetar Crackles with Radio Waves
Astronomers have discovered a rapidly spinning pulsar with a powerful magnetic field - called a magnetar - that's demonstrating some…
Astrophoto: Star Trails over Namibia by Josch Hambsch
Arc lights had been used in lighthouses for several years when Thomas Edison began seeking a way to improve them.…
Birth of Stars Seen by AKARI
The Japanese AKARI spacecraft - formerly known as Astro-F - captured this photograph of the reflection nebula IC 1396. This…
Atlantis Will Ride Out Ernesto
NASA managers decided on Tuesday that Tropical Storm Ernesto won't pose a threat to the Space Shuttle Atlantis, so they…
Rings Lit by Saturn’s Shine
This is a view looking down onto the unlit side of Saturn's rings, lit only by the reflected light from…
Hubble’s View of Supernova Remnant Cassiopeia A
NASA's Hubble Space Telescope took this photograph of supernova remnant Cassiopeia A, one of the youngest remnants we know of…
High Altitude Clouds on Mars
ESA scientists have discovered some extremely high altitude clouds on Mars - between 80 and 100 km (50 to 62…
Storm Delays Shuttle Launch
NASA has pushed back the launch of the Space Shuttle Atlantis because of Tropical Storm Ernesto, currently threatening the East…