Nucleus of Comet 103P/Hartley as imaged during a spacecraft flyby. The nucleus is about 2 km in length. This image was captured by NASA’s EPOXI mission between Nov. 3 and 4, 2010, during the spacecraft’s flyby of comet Hartley 2. It was captured using the spacecraft’s Medium-Resolution Instrument. #Astrobiology #Astrophysics #Cosmology #PlanetaryScience #Space #SpaceExploration #SpacePorn