Written by Dr. Tony Phillips
Science at NASA
Washington, D.C. – For a comet, visiting the sun is risky business. Fierce solar heat vaporizes gases long frozen in the fragile nucleus, breaking up some comets and completely destroying others.
That’s why astronomers weren’t sure what would happen in early March when Comet Pan-STARRS, a first-time visitor to the inner solar system, dipped inside the orbit of Mercury.
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NASA says Comet PANSTARRS to make an appearance in March
March 10, 2013 |
Written by DC Agle
NASA’s Jet Propulsion Laboratory
Pasadena, CA – Comets visible to the naked eye are a rare delicacy in the celestial smorgasbord of objects in the nighttime sky. Scientists estimate that the opportunity to see one of these icy dirtballs advertising their cosmic presence so brilliantly they can be seen without the aid of a telescope or binoculars happens only once every five to 10 years.
That said, there may be two naked-eye comets available for your viewing pleasure this year.
 For those in search of comet L4 PANSTARRS, look to the west after sunset in early and mid-March. This graphic shows the comet’s expected positions in the sky. (Image credit: NASA)
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NASA reports Comet from the Oort Cloud to pass by Earth in March
February 7, 2013 |
Written by Dr. Tony Phillips
Science at NASA
Washington, D.C. – Far beyond the orbits of Neptune and Pluto, where the sun is a pinprick of light not much brighter than other stars, a vast swarm of icy bodies circles the solar system. Astronomers call it the “Oort Cloud,” and it is the source of some of history’s finest comets.
One of them could be heading our way now.
Comet Pan-STARRS was discovered by the Panoramic Survey Telescope & Rapid Response System atop the Haleakala volcano in Hawaii. Astronomers use the massive 1.8 meter telescope to scan the heavens for Earth-approaching objects, both asteroids and comets, that might pose a danger to our planet. In June 2011 a comet appeared, and it was named “Pan-STARRS” after the acronym for the telescope.
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