
Terry Herter, principal investigator for Cornell University’s FORCAST instrument, and Cornell research associate Joe Adams check the alignment of the…

This close-up view of comet Hartley 2 was taken at 7:00 a.m. PDT (10 a.m. EDT), after NASA’s EPOXI mission…

This close-up view of comet Hartley 2 was taken as NASA’s EPOXI mission approached the comet at 6:58 a.m. PDT…

This close-up view of comet Hartley 2 was taken at 7:01 a.m. PDT (10:01 a.m. EDT), after NASA’s EPOXI mission…

Comet Hartley 2 can be seen in glorious detail in this image from NASA’s EPOXI mission. It was taken as…

This close-up view of comet Hartley 2 was taken as NASA’s EPOXI mission approached the comet at 6:59 a.m. PDT…