Comet Hartley 2’s Trail

New findings from NEOWISE, the asteroid and comet-hunting portion of NASA’s Wide-field Infrared Survey Explorer mission, show that comet Hartley 2 leaves a pebbly trail as it laps the sun, dotted with grains as big as golf balls.Previously, NASA’s EPOXI mission, which flew by the comet on Nov. 4, 2010, found golf ball to basketball-sized fluffy ice particles streaming off comet Hartley 2.

The Rosetta Spacecraft’s First Images of Comet 67-P/Churyumov-Gerasimenko

The European Space Agency’s Rosetta spacecraft pursued the comet 67-P/Churyumov-Gerasimenko for more than seven years. And now finally Rosetta can take a series of 52 pictures from a distance of about 101 million miles (163 million kilometers) from comet 67-P/Churyumov-Gerasimenko.67-P/Churyumov-Gerasimenko is about 2.4 miles (4 km) across and completes one orbit around the sun every 6.6 years.

Posts navigation