[/caption] As Jessica Sunshine said, Comet Hartley 2 might be the smallest of the five comets that our spacecraft have…
At best, the few extrasolar planets we have imaged directly are just points of light. But what can that light…
[/caption] NASA's Deep Impact spacecraft came within 700 kilometers (435 miles) of Comet Hartley 2 at 10:01 a.m. EDT (1401…
Watch live coverage of the EPOXI mission's close flyby of Comet Hartley 2. Live coverage begins on November 4, 2010…