Mars Rover Curiosity in Familiar Ground
The SUV-sized Mars rover Curiosity now finds itself just where scientists wanted it: at the northern edge and rim of Gale Crater. What's remarkable is how familiar the landscape looks.
Venus, a Planetary Portrait of Inner Beauty
A Venus transit across the face of the sun is a relatively rare event -- occurring in pairs with more than a century separating each pair. There have been all of 53 transits of Venus across the sun between 2000 B.C. and the last one in 2004.
Solar Eclipse this Weekend
On Sunday, May 20th, the Moon will pass in front of the sun, transforming sunbeams across the Pacific side of Earth into fat crescents and thin rings of light.