International Space Station Commander Dan Burbank captured spectacular imagery of Comet Lovejoy as seen from about 240 miles above the Earth's horizon on Wednesday, Dec....
To extract samples from wily comets, which have just a millionth of Earth's gravitational pull, a harpoon- or ballista-style device may be the best option....
A comet discovered on Friday September 30, 2011 by an amateur astronomer disintegrated on Saturday October 1, 2011 when it plunged into the Sun. The...
Visit science.nasa.gov for more. Astronomers are still scratching their heads over Comet Lovejoy, which plunged through the atmosphere of the sun in December and, against...