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List		 Addition DateSort Ascending Target Mission Instrument Size
Add Image to Favorite List 2011-10-05 Tempel 1 EPOXI
Herschel Space Observatory
 Medium Resolution Instrument (MRI)
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New measurements from NASA's Herschel Space Observatory have discovered water with the same chemical signature as our oceans in a comet called Hartley 2 (pictured at right). The image at bottom right is an artist's concept of a comet.
PIA14738:
The Same Here as There
Full Resolution:     TIFF (17.28 MB)     JPEG (389.3 kB)
Add Image to Favorite List 2011-10-05 Tempel 1 EPOXI
Herschel Space Observatory
 Medium Resolution Instrument (MRI)
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Using NASA's Herschel Space Observatory, astronomers have discovered that comet Hartley 2 possesses a ratio of 'heavy water' to light, or normal, water that matches what's found in Earth's oceans.
PIA14737:
Heavy and Light Just Right
Full Resolution:     TIFF (25.25 MB)     JPEG (397.7 kB)
Add Image to Favorite List 2010-11-18 Tempel 1 EPOXI
 Medium Resolution Instrument (MRI)
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This image shows the nuclei of comets Tempel 1 and Hartley 2, as imaged by NASA's Deep Impact spacecraft, which continued as an extended mission known as EPOXI.
PIA13629:
Tempel 1 and Hartley 2
Full Resolution:     TIFF (922.8 kB)     JPEG (39.88 kB)
Add Image to Favorite List 2010-11-18 Hartley 2 EPOXI
 High Resolution Instrument (HRI)
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Infrared scans of comet Hartley 2 by NASA's EPOXI mission spacecraft show carbon dioxide, dust, and ice being distributed in a similar way and emanating from apparently the same locations on the nucleus.
PIA13628:
The Many Faces of Hartley 2
Full Resolution:     TIFF (212 kB)     JPEG (12.67 kB)
Add Image to Favorite List 2010-11-18 Hartley 2 EPOXI
 Medium Resolution Instrument (MRI)
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This 3-D image shows the region where NASA's Deep Impact mission sent a probe into the surface of comet Tempel 1 in 2005. This picture was taken six years after the Deep Impact collision. 3D glasses are necessary to view this image.
PIA13627:
Hartley 2 in 3-D
Full Resolution:     TIFF (989.1 kB)     JPEG (25.46 kB)
Add Image to Favorite List 2010-11-18 Hartley 2 EPOXI
 Medium Resolution Instrument (MRI)
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Icy particles in the cloud around Hartley 2, as seen by NASA's EPOXI mission spacecraft. A star moving through the background is marked with red and moves in a particular direction, with a particular speed; icy particles move in random directions.
PIA13626:
Tracking "Snowballs" Animation Icon
Full Resolution:     TIFF (540.8 kB)     JPEG (48.6 kB)
Add Image to Favorite List 2010-11-18 Hartley 2 EPOXI
 Medium Resolution Instrument (MRI)
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Images obtained by NASA's EPOXI mission spacecraft show an active end of the nucleus of comet Hartley 2. Icy particles spew from the surface. Most of these particles are traveling with the nucleus; fluffy 'snowballs' about 3 centimeters to 30 centimeters.
PIA13625:
Icy Particle Spray Animation Icon
Full Resolution:     TIFF (239.7 kB)     JPEG (37.32 kB)
Add Image to Favorite List 2010-11-18 Hartley 2 EPOXI
 Medium Resolution Instrument (MRI)
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NASA's EPOXI mission spacecraft obtained these views of the icy particle cloud around comet Hartley 2. The image on the left is the full image of comet Hartley 2 for context, and the image on the right was enlarged and cropped.
PIA13624:
Views of Hartley 2 Nucleus and Inner Coma
Full Resolution:     TIFF (692.2 kB)     JPEG (56.47 kB)
Add Image to Favorite List 2010-11-18 Hartley 2 EPOXI
 High Resolution Instrument (HRI)
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This zoomed-in image from the High-Resolution Instrument on NASA's EPOXI mission spacecraft shows the particles swirling in a 'snow storm' around the nucleus of comet Hartley 2.
PIA13623:
Cometary Flurries
Full Resolution:     TIFF (847.6 kB)     JPEG (255.6 kB)
Add Image to Favorite List 2010-11-18 Hartley 2 EPOXI
 High Resolution Instrument (HRI)
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This image from the High-Resolution Instrument on NASA's EPOXI mission spacecraft shows part of the nucleus of comet Hartley 2. The sun is illuminating the nucleus from the right. A distinct cloud of individual particles is visible.
PIA13622:
Hartley 2, Close Up
Full Resolution:     TIFF (461 kB)     JPEG (36.85 kB)
Add Image to Favorite List 2010-11-05 Hartley 2 EPOXI
 Medium Resolution Instrument (MRI)
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Image taken by NASA's EPOXI mission spacecraft during its flyby of comet Hartley 2 on Nov. 4, 2010. The spacecraft came within about 700 kilometers (435 miles) of the comet's nucleus at the time of closest approach.
PIA13602:
Flight of the Comet Animation Icon
Full Resolution:     TIFF (230.3 kB)     JPEG (9.195 kB)
Add Image to Favorite List 2010-11-05 Hartley 2 EPOXI
 Medium Resolution Instrument (MRI)
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This close-up view of comet Hartley 2 was taken at 7:00 a.m. PDT (10 a.m. EDT), after NASA's EPOXI mission flew by.
PIA13601:
Leaving Comet Hartley 2
Full Resolution:     TIFF (251.5 kB)     JPEG (5.035 kB)
Add Image to Favorite List 2010-11-05 Hartley 2 EPOXI
 Medium Resolution Instrument (MRI)
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This close-up view of comet Hartley 2 was taken at 7:00 a.m. PDT (10 a.m. EDT), after NASA's EPOXI mission flew by.
PIA13600:
Slipping By Comet Hartley 2
Full Resolution:     TIFF (251.5 kB)     JPEG (7.469 kB)
Add Image to Favorite List 2010-11-05 Hartley 2 EPOXI
 Medium Resolution Instrument (MRI)
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This close-up view of comet Hartley 2 was taken as NASA's EPOXI mission approached the comet at 6:59 a.m. PDT (9:59 a.m. EDT).
PIA13579:
Almost There at Comet Hartley 2
Full Resolution:     TIFF (251.5 kB)     JPEG (8.066 kB)
Add Image to Favorite List 2010-11-05 Hartley 2 EPOXI
 Medium Resolution Instrument (MRI)
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This close-up view of comet Hartley 2 was taken as NASA's EPOXI mission approached the comet at 6:58 a.m. PDT (9:58 a.m. EDT).
PIA13578:
Closing in on Comet Hartley 2
Full Resolution:     TIFF (251.5 kB)     JPEG (5.171 kB)
Add Image to Favorite List 2010-11-04 Hartley 2 EPOXI
 Medium Resolution Instrument (MRI)
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This image montage shows comet Hartley 2 as NASA's EPOXI mission approached and flew under the comet. The images progress in time clockwise, starting at the top left.
PIA13577:
Flying Under Comet Hartley 2
Full Resolution:     TIFF (6.754 MB)     JPEG (172.1 kB)
Add Image to Favorite List 2010-11-04 Hartley 2 EPOXI
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This montage from NASA's EPOXI mission shows the only five comets imaged up close with spacecraft. The comets vary in shape and size. Comet Hartley 2 is by far the smallest and the most active of small comets.
PIA13576:
Fab Five
Full Resolution:     TIFF (6.754 MB)     JPEG (265.1 kB)
Add Image to Favorite List 2010-11-04 Hartley 2 EPOXI
 Medium Resolution Instrument (MRI)
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This image, one of the closest taken of comet Hartley 2 by NASA's EPOXI mission, shows many features across the comet's surface. The length of the comet is equal to the distance between the Capitol building and the Washington Monument in Washington.
PIA13575:
Up Close and Personal with Hartley 2
Full Resolution:     TIFF (20.23 MB)     JPEG (204.6 kB)
Add Image to Favorite List 2010-11-04 Hartley 2 EPOXI
 Medium Resolution Instrument (MRI)
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This enhanced image, one of the closest taken of comet Harley 2 by NASA's EPOXI mission, shows jets and where they originate from the surface. There are jets outgassing from the sunward side, the night side, and along the terminator.
PIA13574:
Jets Galore
Full Resolution:     TIFF (6.754 MB)     JPEG (199.9 kB)
Add Image to Favorite List 2010-11-04 Hartley 2 EPOXI
 High Resolution Instrument (HRI)
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The upper panel of this figure shows small images of comet Hartley 2 taken by NASA's EPOXI mission over time. The lower panel is a graph showing the variation of total brightness, and the variation of the total amount of carbon dioxide, during the time.
PIA13573:
Carbon Dioxide Fluctuations in Comet Hartley 2
Full Resolution:     TIFF (628.7 kB)     JPEG (18.46 kB)
Add Image to Favorite List 2010-11-04 Hartley 2 EPOXI
 High Resolution Instrument (HRI)
Medium Resolution Instrument (MRI)
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These three pairs of images from NASA's EPOXI mission demonstrate that a dust jet and gaseous carbon dioxide are being released from comet Hartley 2 at the same time, and from the same location on the comet.
PIA13572:
Evidence for a First-of-Its-Kind Comet Jet
Full Resolution:     TIFF (1.119 MB)     JPEG (35.8 kB)
Add Image to Favorite List 2010-11-04 Hartley 2 EPOXI
 Medium Resolution Instrument (MRI)
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Comet Hartley 2 can be seen in glorious detail in this image from NASA's EPOXI mission. It was taken as the spacecraft flew by around 6:59 a.m. PDT (9:59 a.m. EDT), from a distance of about 700 kilometers (435 miles).
PIA13570:
Introducing Comet Hartley 2
Full Resolution:     TIFF (251.5 kB)     JPEG (9.679 kB)
Add Image to Favorite List 2010-11-04 Hartley 2 EPOXI
 High Resolution Instrument (HRI)
Medium Resolution Instrument (MRI)
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NASA's Deep Impact spacecraft's High- and Medium-Resolution Imagers (HRI and MRI) captured multiple jets emanating from comet Hartley 2 turning on and off while the spacecraft is 8 million kilometers (5 million miles) away from the comet.
PIA13568:
Spacecraft Images Comet Target's Jets Animation Icon
Full Resolution:     TIFF (682.5 kB)     JPEG (57.09 kB)
Add Image to Favorite List 2010-11-03 Hartley 2 EPOXI
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NASA's EPOXI mission took this image of comet Hartley 2 on Nov. 2, 2010. The spacecraft will fly by the comet on Nov. 4, 2010. The white blob and the halo around it are the comet's outer cloud of gas and dust, called a coma.
PIA13566:
Comet Hartley 2 Looms Large in the Sky
Full Resolution:     TIFF (262.6 kB)     JPEG (21.42 kB)
Add Image to Favorite List 2010-10-26 Hartley 2 EPOXI
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This artist's concept shows a view of NASA's EPOXI mission spacecraft during its Nov. 4, 2010 flyby of comet Hartley 2. The fluffy shell around the comet, called a coma, is made up of gas and dust that blew off the comet's core, or nucleus.
PIA13548:
Comet Hartley 2 Gets a Visitor (Artist Concept)
Full Resolution:     TIFF (609.3 kB)     JPEG (13.71 kB)
Add Image to Favorite List 2010-10-26 Hartley 2 EPOXI
 Medium Resolution Instrument (MRI)
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This image from NASA's EPOXI mission shows Hartley 2 moving across the background field of stars. The coma, or cloud of gas and dust around the comet, expands and brightens over this time period. Animation available at the Photojournal.
PIA13547:
Hartley 2 on the Move
Full Resolution:     TIFF (355 kB)     JPEG (29.7 kB)
Add Image to Favorite List 2010-10-26 Tempel 1 EPOXI
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This frame from a movie begins with the launch of NASA's Deep Impact on Jan. 12, 2005, from Cape Canaveral, Fla. On July 4, 2005, the mission released a probe into Comet Tempel 1, revealing its pristine, inner material.
PIA13546:
EPOXI's Trip to Meet Comet Hartley 2
Full Resolution:     TIFF (682.4 kB)     JPEG (8.732 kB)
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