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Last Tuesday, Pan-STARRS made its closest approach ever of Earth. The comet's name is actually an acronym for the telescope in Hawaii used to discover it two years ago: the Panoramic Survey Telescope and Rapid Response System. Astronomers believe Pan-STARRS somehow got kicked out of the Oort Cloud that is full of icy bodies beyond the orbits of Neptune and Pluto, and propelled into the inner solar system. It will be visible in the Northern Hemisphere for weeks to come. Have no fear: Pan-STARRS poses no threat to Earth. Neither does comet ISON, which promises to outdo Pan-STARRS. Astronomers believe ISON will rival the moon in brightness, come November. ___ Online: Space Weather: http://spaceweather.com/ NASA:
http://www.nasa.gov/mission_pages/asteroids/
news/comet20130307.html
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