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Space Exploration Nov 11, 2013

Comets play a role in the history of civilization

The sight of a bright comet has fascinated humankind through the ages. But what's behind such celestial spectacles? It's only in modern times that researchers have got wise to the phenomenon - by then, the comets already ...

Space Exploration Sep 24, 2013

Preparing for comet ISON

(Phys.org) —ESA's space missions are getting ready to observe an icy visitor to the inner Solar System: Comet ISON, which might also be visible in the night sky later this year as a naked eye object.

Space Exploration Sep 20, 2013

Deep Impact mission ends, leaves bright comet tale

(Phys.org) —NASA today announced the end of operations for the Deep Impact spacecraft, history's most traveled deep-space comet hunter, after trying unsuccessfully for more than a month to regain contact with the spacecraft.

Space Exploration Jul 24, 2013

NASA's Spitzer observes gas emission from comet ISON

Astronomers using NASA's Spitzer Space Telescope have observed what most likely are strong carbon dioxide emissions from Comet ISON ahead of its anticipated pass through the inner solar system later this year.

Space Exploration May 30, 2013

Gemini captures Comet ISON hurtling toward uncertain destiny with the Sun

(Phys.org) —A new series of images from Gemini Observatory shows Comet C/2012 S1 (ISON) racing toward an uncomfortably close rendezvous with the Sun. In late November the comet could present a stunning sight in the twilight ...

Space Exploration May 9, 2013

Water on Moon and Earth came from same primitive meteorites, analysis shows

The water found on the moon, like that on Earth, came from small meteorites called carbonaceous chondrites in the first 100 million years or so after the solar system formed, researchers from Brown and Case Western Reserve ...

Space Exploration Mar 29, 2013

Swift satellite sizes up comet ISON (w/ video)

(Phys.org) —Astronomers from the University of Maryland at College Park (UMCP) and Lowell Observatory have used NASA's Swift satellite to check out comet C/2012 S1 (ISON), which may become one of the most dazzling in decades ...

Space Exploration Mar 18, 2013

How a sunset comet came to be

(Phys.org) —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.

Space Exploration Mar 11, 2013

Comet posing beside crescent moon in cool photo op

Now's your chance to see the comet that passed within 100 million miles of Earth last week. Twilight on Tuesday will provide the best photo op for the comet called Pan-STARRS. It will be visible in the Northern Hemisphere ...

Space Exploration Mar 8, 2013

Russian asteroid explosion and past impactors paint a potentially grim future for Earth

The recent meteor explosion over Chelyabinsk brought to the forefront a topic that has worried astronomers for years, namely that an impactor from space could cause widespread human fatalities. Indeed, the thousand+ injured ...

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