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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.
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.

The Same Here as There

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.

Target: Comet
Mission: EPOXI, Herschel Space Observatory
Spacecraft: Deep Impact (DIXI)
Instrument: Medium Resolution Instrument (MRI)
ID#: PIA14738
Added: 2011-10-05

Views: 3542

The Same Here as There

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.

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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.
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.

Heavy and Light Just Right

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.

Target: Comet
Mission: EPOXI, Herschel Space Observatory
Spacecraft: Deep Impact (DIXI)
Instrument: Medium Resolution Instrument (MRI)
ID#: PIA14737
Added: 2011-10-05

Views: 2681

Heavy and Light Just Right

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.

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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.
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.

Hartley 2 in 3-D

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.

Target: Comet
Mission: EPOXI
Spacecraft: Deep Impact (DIXI)
Instrument: Medium Resolution Instrument (MRI)
ID#: PIA13627
Added: 2010-11-18

Views: 3828

Hartley 2 in 3-D

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.

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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.
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.

Hartley 2, Close Up

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.

Target: Comet
Mission: EPOXI
Spacecraft: Deep Impact (DIXI)
Instrument: High Resolution Instrument (HRI)
ID#: PIA13622
Added: 2010-11-18

Views: 3746

Hartley 2, Close Up

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.

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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.
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.

Leaving Comet Hartley 2

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.

Target: Comet
Mission: EPOXI
Spacecraft: Deep Impact (DIXI)
Instrument: Medium Resolution Instrument (MRI)
ID#: PIA13601
Added: 2010-11-05

Views: 2770

Leaving Comet Hartley 2

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.

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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.
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.

Slipping By Comet Hartley 2

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.

Target: Comet
Mission: EPOXI
Spacecraft: Deep Impact (DIXI)
Instrument: Medium Resolution Instrument (MRI)
ID#: PIA13600
Added: 2010-11-05

Views: 3459

Slipping By Comet Hartley 2

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.

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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).
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).

Almost There at Comet Hartley 2

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).

Target: Comet
Mission: EPOXI
Spacecraft: Deep Impact (DIXI)
Instrument: Medium Resolution Instrument (MRI)
ID#: PIA13579
Added: 2010-11-05

Views: 3132

Almost There at Comet Hartley 2

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).

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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).
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).

Closing in on Comet Hartley 2

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).

Target: Comet
Mission: EPOXI
Spacecraft: Deep Impact (DIXI)
Instrument: Medium Resolution Instrument (MRI)
ID#: PIA13578
Added: 2010-11-05

Views: 3676

Closing in on Comet Hartley 2

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).

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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.
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.

Flying Under Comet Hartley 2

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.

Target: Comet
Mission: EPOXI
Spacecraft: Deep Impact (DIXI)
Instrument: Medium Resolution Instrument (MRI)
ID#: PIA13577
Added: 2010-11-04

Views: 4198

Flying Under Comet Hartley 2

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.

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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.
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.

Up Close and Personal with Hartley 2

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.

Target: Comet
Mission: EPOXI
Spacecraft: Deep Impact (DIXI)
Instrument: Medium Resolution Instrument (MRI)
ID#: PIA13575
Added: 2010-11-04

Views: 3356

Up Close and Personal with Hartley 2

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.

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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.
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.

Jets Galore

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.

Target: Comet
Mission: EPOXI
Spacecraft: Deep Impact (DIXI)
Instrument: Medium Resolution Instrument (MRI)
ID#: PIA13574
Added: 2010-11-04

Views: 4457

Jets Galore

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.

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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).
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).

Introducing Comet Hartley 2

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).

Target: Comet
Mission: EPOXI
Spacecraft: Deep Impact (DIXI)
Instrument: Medium Resolution Instrument (MRI)
ID#: PIA13570
Added: 2010-11-04

Views: 4704

Introducing Comet Hartley 2

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).

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Spacecraft Images Comet Target's Jets

Target: Comet
Mission: EPOXI
Spacecraft: Deep Impact (DIXI)
Instrument: High Resolution Instrument (HRI), Medium Resolution Instrument (MRI)
ID#: PIA13568
Added: 2010-11-04

Views: 2798

Spacecraft Images Comet Target's Jets

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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.
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.

Comet Hartley 2 Looms Large in the Sky

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.

Target: Comet
Mission: EPOXI
Spacecraft: Deep Impact (DIXI)
ID#: PIA13566
Added: 2010-11-03

Views: 2840

Comet Hartley 2 Looms Large in the Sky

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.

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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.
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.

Comet Hartley 2 Gets a Visitor (Artist Concept)

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.

Target: Comet
Mission: EPOXI
Spacecraft: Deep Impact (DIXI)
ID#: PIA13548
Added: 2010-10-26

Views: 3415

Comet Hartley 2 Gets a Visitor (Artist Concept)

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.

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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.
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.

Hartley 2 on the Move

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.

Target: Comet
Mission: EPOXI
Spacecraft: Deep Impact (DIXI)
Instrument: Medium Resolution Imager (MRI)
ID#: PIA13547
Added: 2010-10-26

Views: 3227

Hartley 2 on the Move

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.

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