Images of Rosetta's target comet resolve structures as small as 330 feet (100 meters) across.
› Read more (July 24, 2014)
NEOWISE Spots a Comet That Looked Like an Asteroid
Comet C/2013 UQ4 (Catalina) was originally thought to be an asteroid, but observations by NASA's NEOWISE spacecraft indicate that it's a comet.
› Read more (July 23, 2014)
Rosetta Spacecraft Approaching Twofold Comet
Comet 67P/Churyumov-Gerasimenko, destination of the European Space Agency's Rosetta mission, reveals a two-part shape.
› Read more (July 17, 2014)
Looking Back at the Jupiter Crash 20 Years Later
Twenty years ago, space assets from NASA/JPL watched as the fragments of comet Shoemaker-Levy 9 made their historic plunge into the atmosphere of Jupiter.
› Read more (July 15, 2014)
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.