Asteroid Watch

Image of 67P/Churyumov-Gerasimenko shows the diversity of surface structures on the comet's nucleus.

As Seen by Rosetta: Comet Surface Variations

New Rosetta image shows the diversity of surface structures on the nucleus of comet 67P/Churyumov-Gerasimenko.

› Read more (August 15, 2014)

Recent News

35 micron-long hole produced by a 3 picogram mote Stardust Discovers Potential Interstellar Space Particles

Seven microscopic dust particles collected during NASA's Stardust mission may be the first samples of contemporary interstellar dust.

Read more (August 14, 2014)

Rosetta's Comet from 177 Miles Rosetta Arrives at Target Comet

After a decade-long journey chasing its target, the European Space Agency's Rosetta, carrying three NASA instruments, became the first spacecraft to orbit a comet.

Read more (August 06, 2014)

Comet 67P from 1,200 Miles Away Rosetta's Comet: Imaging the Coma

A distinct coma surrounds Comet 67P/Churyumov-Gerasimenko as seen from Rosetta.

Read more (July 31, 2014)

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Next Five Close Approaches

Average distance between Earth and the moon is about 239,000 miles (385,000 kilometers).

The Asteroid Watch Widget tracks asteroids and comets that will make relatively close approaches to Earth. The Widget displays the date of closest approach, approximate object diameter, relative size and distance from Earth for each encounter. The object's name is displayed by hovering over its encounter date. Clicking on the encounter date will display a Web page with details about that object.

The Widget displays the next five Earth approaches to within 4.6 million miles (7.5 million kilometers or 19.5 times the distance to the moon); an object larger than about 150 meters that can approach the Earth to within this distance is termed a potentially hazardous object.

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Archived Ustream Events

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Featured Multimedia

The Rosetta Mission Asks: What Can We Learn From Comets? The Rosetta Mission Asks: What Can We Learn From Comets?

The Rosetta mission will give us an unprecedented look inside a comet, watching the icy traveler become active as it nears the sun.

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Yeomans' Top 10

Don Yeomans Asteroid attack, mini-me, rich neighbors and more. Learn why these are cool asteroid factoids from JPL senior research scientist Don Yeomans.

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In-depth Information

› Near Earth Objects site for technical data

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