NASA






Asteroid to skim past Earth

An asteroid larger than a double-decker bus is to pass within 28,000 miles of Earth on Tuesday, but has no chance of hitting the planet,…


Comet Closing in on Earth

Hartley 2 comet (Credit: IPAC-Caltech) CBS News We’ve been following the celestial peregrinations of a very large comet that’s heading our way, and now astronomers…