Comets that take more than 200 years to make one revolution around the Sun are notoriously difficult to study. Because they spend most of their time far from our area of the solar system, many "long-period comets" will never approach the Sun in a…
A NASA spacecraft that discovered and characterized tens of thousands of asteroids throughout the solar system before being placed in hibernation will return to service for three more years starting in September 2013. It will again be assisting in effort
Wide-field Infrared Survey Explorer (WISE) telescope, launched in 2009 and shut down early 2011, was an Earth-orbiting observatory designed by NASA to scan the sky. Whole sky was scanned twice by the telescope in infrared light, captured millions of images and
