NASA's Guide to Viewing the Comet PANSTARRS this Month

Yesterday, the comet 2011 L4 (called PANSTARRS after the Panoramic Survey Telescope and Rapid Response System) became visible in the Northern Hemisphere for the first time, meaning some of us north of the equator will have a chance to view a comet before ISON's passage in the fall. But you'll need the right conditions…

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Asteroid-hunting super-camera has found its first dangerous space rock …

A new telescope, equipped with a 1.8 billion pixel camera, has discovered its first potentially dangerous asteroid. The rock is a lot smaller than any other asteroid we've detected before, and that's great news for our still-developing asteroid defense system.

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