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Rosetta
Rosetta's Comet: Imaging the Coma

A distinct coma surrounds Comet 67P/Churyumov-Gerasimenko as seen from Rosetta.
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2001 Mars Odyssey
NASA's Mars Spacecraft Maneuvers to Prepare for Close Comet Flyby

NASA is taking steps to protect its Mars orbiters, while preserving opportunities to gather valuable scientific data, as Comet C/2013 A1 Siding Spring heads toward a close flyby of Mars on Oct. 19.
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Rosetta
Surface Impressions of Rosetta's Comet

Images of Rosetta's target comet resolve structures as small as 330 feet (100 meters) across.
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WISE (NEOWISE)
NEOWISE Spots a Comet That Looked Like an Asteroid

Comet C/2013 UQ4 (Catalina) was originally thought to be an asteroid, but observations by NASA's NEOWISE spacecraft indicate that it's a comet.
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WISE (NEOWISE)
NEOWISE Spots a Comet That Looked Like an Asteroid

Comet C/2013 UQ4 (Catalina) was originally thought to be an asteroid, but observations by NASA's NEOWISE spacecraft indicate that it's a comet.
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Rosetta Spacecraft Approaching Twofold Comet
Rosetta Spacecraft Approaching Twofold Comet

New images obtained by OSIRIS, the onboard scientific imaging system, confirm the body's peculiar shape hinted at in earlier pictures. Comet 67P is obviously different from other comets visited so far.
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New Horizons
New Horizons Only One Year from Pluto

NASA's New Horizons spacecraft is only a year away from Pluto. Researchers are buzzing with anticipation as NASA prepares to encounter a new world for the first time in decades.
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NASA's Next Giant Leap
NASA's Next Giant Leap

The Apollo missions blazed a path for human exploration to the moon and today we are extending that path to near-Earth asteroids, Mars and beyond.
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Comet Pan-STARRS Marches Across the Sky
Comet Pan-STARRS Marches Across the Sky

Comet Pan-STARRS poses with a spiral galaxy in new snapshots from NASA's NEOWISE mission.
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Comet Pan-STARRS Marches Across the Sky
Comet Pan-STARRS Marches Across the Sky

Comet Pan-STARRS poses with a spiral galaxy in new snapshots from NASA's NEOWISE mission.
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Upcoming Events
06 Mar 2015 Dawn: Ceres Arrival
13 Jun 2015 5th Anniversary, Hayabusa: Sample Return to Earth
22 Jun 2015 5th Anniversary, Deep Impact (EPOXI): Earth Flyby 3
04 Jul 2015 10th Anniversary, Deep Impact (EPOXI): Comet Tempel 1 Impact
10 Jul 2015 5th Anniversary, Rosetta: Asteroid Lutetia Flyby
06 Aug 2015 1st Anniversary, Rosetta: Rosetta's Rendezvous with Comet 67P/Churyumov-Gerasimenko
11 Sep 2015 30th Anniversary, ISEE-3/ICE: Traversed Plasma Tail of Comet Giacobini-Zinner
04 Nov 2015 5th Anniversary, Deep Impact (EPOXI): Comet Hartley 2 Encounter
12 Nov 2015 1st Anniversary, Rosetta: Philae Lands on Comet 67P/Churyumov-Gerasimenko
15 Jan 2016 10th Anniversary, Stardust: Earth Sample Return

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