WASHINGTON, May 16, 2012 /PRNewswire-USNewswire/ -- Observations from NASA's Wide-field Infrared Survey Explorer (WISE) have led to the best assessment yet of our solar system's population of

NASA unleashed a new analysis of the giant asteroid Vesta on Thursday based on data taken by its Dawn spacecraft.

WASHINGTON, April 25, 2012 /PRNewswire-USNewswire/ -- Research by NASA and international scientists concludes giant asteroids, similar or larger than the one believed to have killed the dinosaurs,

Researchers are reporting in the journal Nature that tiny "spherules" embedded in layers of rock have given them details about Earth's asteroid impacts.

Though generally thought to be quite dry, roughly half of the giant asteroid Vesta is expected to be so cold and to receive so little sunlight that water ice could have survived there for billions of years.