This pair of images shows the before-and-after comparison of the part of comet Tempel 1 that was hit by the impactor from NASA Deep Impact spacecraft.

NASA Stardust-NExT mission transmitted the first image it took during its approach to comet Tempel 1 at 8:35 p.m. PST 11:35 p.m. EST on Feb. 14, 2011.

This image shows the surface of comet Tempel 1 before and after NASA Deep Impact mission sent a probe into the comet in 2005. The region was imaged by Deep Impact before the collision left, then six years later on by NASA Stardust-NExT mission.

This image mosaic shows four different views of comet Tempel 1 as seen by NASA Stardust spacecraft as it flew by on Feb. 14, 2011. The images progress in time beginning at upper left, upper right, to lower left, then lower right.

Steve Chesley, Stardust NExT co-investigator, the Jet Propulsion Laboratory, holds up a model of Comet Tempel 1 during a news briefing, Wednesday, Jan. 19, 2011, at NASA Headquarters in Washington. On Feb. 14, 2011 NASA's Stardust-NExT (New Exploration of Tempel 1) mission will encounter Comet Tempel 1, providing a unique opportunity to measure the dust properties which will also provide a comparison between two observations of a single comet, Tempel 1, taken before and after a single orbital pass around the sun. Photo Credit: (NASA/Paul E. Alers)

Tim Larson, Stardust NExT Project Manager, speaks during a news briefing, Wednesday, Jan. 19, 2011, at NASA Headquarters in Washington. On Feb. 14, 2011 NASA's Stardust-NExT (New Exploration of Tempel 1) mission will encounter Comet Tempel 1, providing a unique opportunity to measure the dust properties which will also provide a comparison between two observations of a single comet, Tempel 1, taken before and after a single orbital pass around the sun. Photo Credit: (NASA/Paul E. Alers)

Joe Ververka, Stardust NExT Principal Investigator, from Cornell University, speaks during a news briefing, Wednesday, Jan. 19, 2011, at NASA Headquarters in Washington. On Feb. 14, 2011 NASA's Stardust-NExT (New Exploration of Tempel 1) mission will encounter Comet Tempel 1, providing a unique opportunity to measure the dust properties which will also provide a comparison between two observations of a single comet, Tempel 1, taken before and after a single orbital pass around the sun. Photo Credit: (NASA/Paul E. Alers)

Pete Schultz, Stardust NExT co-investigator, from Brown University, speaks during a news briefing, Wednesday, Jan. 19, 2011, at NASA Headquarters in Washington. On Feb. 14, 2011 NASA's Stardust-NExT (New Exploration of Tempel 1) mission will encounter Comet Tempel 1, providing a unique opportunity to measure the dust properties which will also provide a comparison between two observations of a single comet, Tempel 1, taken before and after a single orbital pass around the sun. Photo Credit: (NASA/Paul E. Alers)

These pictures of comet Tempel 1 were taken by NASA Hubble Space Telescope. They show the comet before and after it ran over NASA Deep Impact probe.

NASA Deep Impact flyby spacecraft took this image after it turned around to capture last shots of a receding comet Tempel 1. Earlier, the mission probe had smashed into the surface of Tempel 1.

This spectacular image of comet Tempel 1 was taken 67 seconds after it obliterated NASA Deep Impact impactor spacecraft.

Artist concept of NASA Stardust-NExT mission, which will fly by comet Tempel 1 on Feb. 14, 2011.

This image from NASA TV shows the nucleus of comet Tempel 1 from Deep Impact flyby high-resolution imager.

This image shows comet Tempel 1 as seen through the clear filter of the medium resolution imager camera on NASA Deep Impact. It was taken on July 1, 2005.

This image of the surface of comet Tempel 1 was taken about 20 seconds before NASA Deep Impact probe crashed into the comet on July 3, 2005. This particular region contains the impact site.

This false-color image shows comet Tempel 1 as seen by NASA Chandra X-ray Observatory on June 30, 2005, Universal Time. The comet was bright and condensed.

This false-color image shows comet Tempel 1 about 50 minutes after NASA Deep Impact probe smashed into its surface. The impact site is located on the far side of the comet in this view.

Taken on April 25, 2005, sixty-nine days before it gets up-close-and-personal with a comet, NASA Deep Impact spacecraft successfully photographed its quarry, comet Tempel 1, at a distance of 39.7 million miles.

This composite image was taken by NASA Stardust navigation camera 42 hours before its encounter with comet Tempel 1. The spacecraft is due to encounter the comet in the evening hours of Feb. 14, 2011.

This image composite shows comet Tempel 1 in infrared light . The infrared picture highlights the warm, or sunlit, side of the comet, where NASA Deep Impact probe later hit.

This image shows the view from NASA Deep Impact flyby spacecraft as it turned back to look at comet Tempel 1. Fifty minutes earlier, the spacecraft probe was run over by the comet.

This image shows the view from NASA Deep Impact probe 30 minutes before it was pummeled by comet Tempel 1. The picture brightness has been enhanced to show the jets of dust streaming away from the comet.

Comet Tempel 1 as seen by the NASA Deep Impact impactor targeting sensor at 7:44 Universal Time, July 3, 2005.

This pair of images shows the before-and-after comparison of the part of comet Tempel 1 that was hit by the impactor from NASA Deep Impact spacecraft.

This image shows comet Tempel 1 as seen through the clear filter of the medium resolution imager camera on NASA Deep Impact. It was taken on June 25, 2005.

This image shows comet Tempel 1 as seen through the clear filter of the medium resolution imager camera on NASA Deep Impact. It was taken on June 26, 2005.

This image shows comet Tempel 1 as seen through the clear filter of the medium resolution imager camera on NASA Deep Impact. It was taken on June 27, 2005.

This image shows comet Tempel 1 as seen through the clear filter of the medium resolution imager camera on NASA Deep Impact. It was taken on June 30, 2005.

This image from an animation shows comet Tempel 1 as seen through the clear filter of the medium resolution imager camera on NASA Deep Impact.

This pair of images shows the before-and-after comparison of the part of comet Tempel 1 that was hit by the impactor from NASA Deep Impact spacecraft.

This image shows comet Tempel 1 as seen through the clear filter of the medium resolution imager camera on NASA Deep Impact. It was taken on June 29, 2005.

This anaglyph shows the region where NASA Deep Impact mission sent a probe into the surface of comet Tempel 1 in 2005. 3D glasses are necessary to view this image.

This pair of images shows a before-and-after comparison of the area on comet Tempel 1 targeted by an impactor from NASA Deep Impact spacecraft in July 2005.

These two images show the different views of comet Tempel 1 seen by NASA Deep Impact spacecraft left and NASA Stardust spacecraft right.

This image shows the nuclei of comets Tempel 1 and Hartley 2, as imaged by NASA Deep Impact spacecraft, which continued as an extended mission known as EPOXI.

One of the two pictures of Tempel 1 (see also PIA02101) taken by Deep Impact's medium-resolution camera is shown next to data of the comet taken by the spacecraft's infrared spectrometer. This instrument breaks apart light like a prism to reveal the "fingerprints," or signatures, of chemicals. Even though the spacecraft was over 10 days away from the comet when these data were acquired, it detected some of the molecules making up the comet's gas and dust envelope, or coma. The signatures of these molecules -- including water, hydrocarbons, carbon dioxide and carbon monoxide -- can be seen in the graph, or spectrum. Deep Impact's impactor spacecraft is scheduled to collide with Tempel 1 at 10:52 p.m. Pacific time on July 3 (1:52 a.m. Eastern time, July 4). The mission's flyby spacecraft will use its infrared spectrometer to sample the ejected material, providing the first look at the chemical composition of a comet's nucleus. These data were acquired from June 20 to 21, 2005. The picture of Tempel 1 was taken by the flyby spacecraft's medium-resolution instrument camera. The infrared spectrometer uses the same telescope as the high-resolution instrument camera. http://photojournal.jpl.nasa.gov/catalog/PIA02100

This image layout depicts changes in the surface of comet Tempel 1, observed first by NASA Deep Impact Mission in 2005 top right and again by NASA Stardust-NExT mission on Feb. 14, 2011 bottom right.

This image shows the initial ejecta that resulted when NASA Deep Impact probe collided with comet Tempel 1 on July 3, 2005. It was taken by the spacecraft high-resolution camera 13 seconds after impact.

This image shows NASA Deep Impact impactor probe approaching comet Tempel 1. It is made up of images taken by the probe impactor targeting sensor on July 4, 2005. Animation available at the Photojournal.

This image obtained by NASA Stardust spacecraft shows a side of the nucleus of comet Tempel 1 that has never been seen before; three terraces of different elevations are visible, with dark, banded scarps, or slopes, separating them.

This composite image shows the three small worlds NASA Stardust spacecraft encountered during its 12 year mission. Stardust performed a flyby of asteroid Annefrank in 2002, Comet Wild in 2004, and Tempel 1 in 2011.

This image shows comet Tempel 1 approximately 30 seconds before NASA Deep Impact probe smashed into its surface. It was taken by the probe impactor targeting sensor.

NASA Deep Impact flyby spacecraft shows the flash that occurred when comet Tempel 1 ran over the spacecraft probe taken by the high-resolution camera over a period of 40 seconds.

This image layout depicts changes in the surface of comet Tempel 1, observed first by NASA Deep Impact Mission in 2005 top right and again by NASA Stardust-NExT mission on Feb. 14, 2011 bottom right.

This image is a compilation of four images that were taken on June 13, 2005 by NASA Deep Impact. The spacecraft is 18,675,137.9 kilometers 11,604,190 miles away from comet Tempel 1.

This frame from a movie shows NASA Deep Impact impactor probe approaching comet Tempel 1. It is made up of images taken by the probe impactor targeting sensor in 2005.

This series of images shows the area where NASA Deep Impact probe collided with the surface of comet Tempel 1 in 2005. The view zooms in as the images progress from top left to right, and then bottom left to right.

These images shows comet Tempel 1 as seen through the clear filter of the medium resolution imager camera on NASA Deep Impact. The images were acquired between June 22 and June 24, 2005.

When NASA Deep Impact probe collided with Tempel 1, a bright, small flash was created, which rapidly expanded above the surface of the comet. This flash lasted for more than a second.

This image shows comet Tempel 1 approximately 90 seconds before NASA Deep Impact probe smashed into its surface. It was taken by the probe impactor targeting sensor.

This image shows how NASA Deep Impact impactor targeted comet Tempel 1 as the spacecraft made its final approach in the early morning hours of July 4, 2005.

This display shows highly processed images of the outburst of comet Tempel 1 between June 22 and 23, 2005. The pictures were taken by NASA Deep Impact medium-resolution camera.

This image shows comet Tempel 1 approximately 5 minutes before NASA Deep Impact probe smashed into its surface. It was taken by the probe impactor targeting sensor.

This image shows a flash produced in a laboratory by a high-velocity bead slamming into dust. Scientists at Ames Research Center say that the collision between Deep Impact impactor and comet Tempel 1 may have produce a similar flash.

This movie was taken by Deep Impact flyby spacecraft shows the flash that occurred when comet Tempel 1 ran over the spacecraft probe. It was taken by the flyby craft medium-resolution camera.

The image depicts the first moments after NASA Deep Impact probe interfaced with comet Tempel 1. The illuminated, and possibly incandescent, debris is expanding from the impact site.

This image is from an animation that chronicles the travels of NASA Deep Impact spacecraft, from its launch in January of 2005 to its dramatic impact 172 days later with comet Tempel 1.

On April 25, 2005 NASA Deep Impact spacecraft obtained its first optical navigation Op-Nav image of comet Tempel 1. At the time the picture was taken the distance between spacecraft and comet was 64 million kilometers 39.7 million miles away.

he Kitt Peak National Observatory 2.1-meter telescope observed comet Tempel 1 on April 11, 2005, when the comet was near its closest approach to the Earth. A pinkish dust jet is visible to the southwest, with the broader neutral gas coma surrounding it.

This picture of Tempel 1 was taken by NASA Deep Impact. Even though the spacecraft was over 10 days away from the comet when these data were acquired, it detected some of the molecules making up the comet gas and dust envelope, or coma.

This image shows the initial ejecta that resulted when NASA Deep Impact probe collided with comet Tempel 1 at 10:52 p.m. Pacific time, July 3 1:52 a.m. Eastern time, July 4, 2005.

This image shows comet Tempel 1 six minutes before it ran over NASA Deep Impact probe at 10:52 a.m. Pacific time, July 3 1:52 a.m. Eastern time, July 4, 2005.

This image shows comet Tempel 1 six minutes before it ran over NASA Deep Impact probe at 10:52 a.m. Pacific time, July 3 1:52 a.m. Eastern time, July 4, 2005.

This image shows comet Tempel 1 sixty seconds before it ran over NASA Deep Impact probe at 10:52 p.m. Pacific time, July 3 1:52 a.m. Eastern time, July 4., 2005.

This image shows the initial ejecta that resulted when NASA Deep Impact probe collided with comet Tempel 1 at 10:52 p.m. Pacific time, July 3 1:52 a.m. Eastern time, July 4, 2005.

This pair of images shows the area affected by the impactor released by NASA Deep Impact spacecraft in July 2005.

This 3-D image shows the region where NASA 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 frame from a movie begins with the launch of NASA 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.

Reversed stereo image pair covering the region of NASA Deep Impact site from the Stardust-NExT mission.

KENNEDY SPACE CENTER, FLA. - On Launch Pad 17-B, Cape Canaveral Air Force Station, Fla., the Boeing Delta II carrying the Deep Impact spacecraft rocket shines under spotlights in the early dawn hours as it waits for launch. Scheduled for liftoff at 1:47 p.m. EST today, Deep Impact will head for space and a rendezvous with Comet Tempel 1 when the comet is 83 million miles from Earth. After releasing a 3- by 3-foot projectile (impactor) to crash onto the surface July 4, 2005, Deep Impact’s flyby spacecraft will reveal the secrets of the comet’s interior by collecting pictures and data of how the crater forms, measuring the crater’s depth and diameter as well as the composition of the interior of the crater and any material thrown out, and determining the changes in natural outgassing produced by the impact. It will send the data back to Earth through the antennas of the Deep Space Network. Deep Impact is a NASA Discovery mission.

KENNEDY SPACE CENTER, FLA. - On Launch Pad 17-B, Cape Canaveral Air Force Station, Fla., the Boeing Delta II rocket carrying the Deep Impact spacecraft is bathed in light waiting for tower rollback before launch. Scheduled for liftoff at 1:47 p.m. EST today, Deep Impact will head for space and a rendezvous with Comet Tempel 1 when the comet is 83 million miles from Earth. After releasing a 3- by 3-foot projectile (impactor) to crash onto the surface July 4, 2005, Deep Impact’s flyby spacecraft will reveal the secrets of the comet’s interior by collecting pictures and data of how the crater forms, measuring the crater’s depth and diameter as well as the composition of the interior of the crater and any material thrown out, and determining the changes in natural outgassing produced by the impact. It will send the data back to Earth through the antennas of the Deep Space Network. Deep Impact is a NASA Discovery mission.

KENNEDY SPACE CENTER, FLA. - On Launch Pad 17-B, Cape Canaveral Air Force Station, Fla., shadows paint the Boeing Delta II rocket carrying the Deep Impact spacecraft as the mobile service tower at left is rolled back before launch.Scheduled for liftoff at 1:47 p.m. EST today, Deep Impact will head for space and a rendezvous with Comet Tempel 1 when the comet is 83 million miles from Earth. After releasing a 3- by 3-foot projectile (impactor) to crash onto the surface July 4, 2005, Deep Impact’s flyby spacecraft will reveal the secrets of the comet’s interior by collecting pictures and data of how the crater forms, measuring the crater’s depth and diameter as well as the composition of the interior of the crater and any material thrown out, and determining the changes in natural outgassing produced by the impact. It will send the data back to Earth through the antennas of the Deep Space Network. Deep Impact is a NASA Discovery mission.

KENNEDY SPACE CENTER, FLA. - On Launch Pad 17-B, Cape Canaveral Air Force Station, Fla., the Boeing Delta II rocket carrying the Deep Impact spacecraft stands out against an early dawn sky. Scheduled for liftoff at 1:47 p.m. EST today, Deep Impact will head for space and a rendezvous with Comet Tempel 1 when the comet is 83 million miles from Earth. After releasing a 3- by 3-foot projectile (impactor) to crash onto the surface July 4, 2005, Deep Impact’s flyby spacecraft will reveal the secrets of the comet’s interior by collecting pictures and data of how the crater forms, measuring the crater’s depth and diameter as well as the composition of the interior of the crater and any material thrown out, and determining the changes in natural outgassing produced by the impact. It will send the data back to Earth through the antennas of the Deep Space Network. Deep Impact is a NASA Discovery mission.

KENNEDY SPACE CENTER, FLA. - At Astrotech in Titusville, Fla., the high-gain communications antenna is ready for installation on the Deep Impact spacecraft (behind it). A NASA Discovery mission, Deep Impact will probe beneath the surface of Comet Tempel 1 on July 4, 2005, when the comet is 83 million miles from Earth, and reveal the secrets of its interior. During the encounter phase, the high-gain antenna transmits near-real-time images of the impact back to Earth. The spacecraft is scheduled to launch Jan. 8 aboard a Boeing Delta II rocket from Launch Complex 17-B at Cape Canaveral Air Force Station, Fla.

KENNEDY SPACE CENTER, FLA. - Ball Aerospace technicians at Astrotech in Titusville, Fla., attach on overhead crane to the high-gain communications antenna to be installed on the Deep Impact spacecraft. A NASA Discovery mission, Deep Impact will probe beneath the surface of Comet Tempel 1 on July 4, 2005, when the comet is 83 million miles from Earth, and reveal the secrets of its interior. During the encounter phase, the high-gain antenna transmits near-real-time images of the impact back to Earth. The spacecraft is scheduled to launch Jan. 8 aboard a Boeing Delta II rocket from Launch Complex 17-B at Cape Canaveral Air Force Station, Fla.

KENNEDY SPACE CENTER, FLA. - Ball Aerospace technicians at Astrotech in Titusville, Fla., make sure the crane is securely attached to the high-gain communications antenna to be installed on the Deep Impact spacecraft. A NASA Discovery mission, Deep Impact will probe beneath the surface of Comet Tempel 1 on July 4, 2005, when the comet is 83 million miles from Earth, and reveal the secrets of its interior. During the encounter phase, the high-gain antenna transmits near-real-time images of the impact back to Earth. The spacecraft is scheduled to launch Jan. 8 aboard a Boeing Delta II rocket from Launch Complex 17-B at Cape Canaveral Air Force Station, Fla.

KENNEDY SPACE CENTER, FLA. - Ball Aerospace technicians at Astrotech in Titusville, Fla., guide the high-gain communications antenna toward the attach-point on the Deep Impact spacecraft. A NASA Discovery mission, Deep Impact will probe beneath the surface of Comet Tempel 1 on July 4, 2005, when the comet is 83 million miles from Earth, and reveal the secrets of its interior. During the encounter phase, the high-gain antenna transmits near-real-time images of the impact back to Earth. The spacecraft is scheduled to launch Jan. 8 aboard a Boeing Delta II rocket from Launch Complex 17-B at Cape Canaveral Air Force Station, Fla.

KENNEDY SPACE CENTER, FLA. - Ball Aerospace technicians at Astrotech in Titusville, Fla., watch as the high-gain communications antenna is lowered toward the Deep Impact spacecraft for installation. A NASA Discovery mission, Deep Impact will probe beneath the surface of Comet Tempel 1 on July 4, 2005, when the comet is 83 million miles from Earth, and reveal the secrets of its interior. During the encounter phase, the high-gain antenna transmits near-real-time images of the impact back to Earth. The spacecraft is scheduled to launch Jan. 8 aboard a Boeing Delta II rocket from Launch Complex 17-B at Cape Canaveral Air Force Station, Fla.

KENNEDY SPACE CENTER, FLA. - - Ball Aerospace technicians at Astrotech in Titusville, Fla., secure the high-gain communications antenna onto the Deep Impact spacecraft. A NASA Discovery mission, Deep Impact will probe beneath the surface of Comet Tempel 1 on July 4, 2005, when the comet is 83 million miles from Earth, and reveal the secrets of its interior. During the encounter phase, the high-gain antenna transmits near-real-time images of the impact back to Earth. The spacecraft is scheduled to launch Jan. 8 aboard a Boeing Delta II rocket from Launch Complex 17-B at Cape Canaveral Air Force Station, Fla.

KENNEDY SPACE CENTER, FLA. - Ball Aerospace technicians at Astrotech in Titusville, Fla., attach the high-gain communications antenna onto the Deep Impact spacecraft. A NASA Discovery mission, Deep Impact will probe beneath the surface of Comet Tempel 1 on July 4, 2005, when the comet is 83 million miles from Earth, and reveal the secrets of its interior. During the encounter phase, the high-gain antenna transmits near-real-time images of the impact back to Earth. The spacecraft is scheduled to launch Jan. 8 aboard a Boeing Delta II rocket from Launch Complex 17-B at Cape Canaveral Air Force Station, Fla.

KENNEDY SPACE CENTER, FLA. - Ball Aerospace technicians at Astrotech in Titusville, Fla., guide the high-gain communications antenna toward the attach-point on the Deep Impact spacecraft. A NASA Discovery mission, Deep Impact will probe beneath the surface of Comet Tempel 1 on July 4, 2005, when the comet is 83 million miles from Earth, and reveal the secrets of its interior. During the encounter phase, the high-gain antenna transmits near-real-time images of the impact back to Earth. The spacecraft is scheduled to launch Jan. 8 aboard a Boeing Delta II rocket from Launch Complex 17-B at Cape Canaveral Air Force Station, Fla.

KENNEDY SPACE CENTER, FLA. - Ball Aerospace technicians at Astrotech in Titusville, Fla., watch as the high-gain communications antenna is moved toward the Deep Impact spacecraft for installation. A NASA Discovery mission, Deep Impact will probe beneath the surface of Comet Tempel 1 on July 4, 2005, when the comet is 83 million miles from Earth, and reveal the secrets of its interior. During the encounter phase, the high-gain antenna transmits near-real-time images of the impact back to Earth. The spacecraft is scheduled to launch Jan. 8 aboard a Boeing Delta II rocket from Launch Complex 17-B at Cape Canaveral Air Force Station, Fla.

KENNEDY SPACE CENTER, FLA. - On Launch Pad 17-B at Cape Canaveral Air Force Station, the second stage of the Boeing Delta II rocket arrives at the top of the mobile service tower. The element will be mated to the Delta II, which will launch NASA’s Deep Impact spacecraft. A NASA Discovery mission, Deep Impact will probe beneath the surface of Comet Tempel 1 on July 4, 2005, when the comet is 83 million miles from Earth, and reveal the secrets of its interior. After releasing an impactor on a course to hit the comet’s sunlit side, Deep Impact’s flyby spacecraft will collect pictures and data of how the crater forms, measure the crater’s depth and diameter, as well as the composition of the interior of the crater and any material thrown out, and determine the changes in natural outgassing produced by the impact. It will send the data back to Earth through the antennas of the Deep Space Network.

KENNEDY SPACE CENTER, FLA. - On Launch Pad 17-B, Cape Canaveral Air Force Station, Fla., a crane begins lifting the third in a set of three Solid Rocket Boosters (SRBs). The SRBs will be hoisted up the mobile service tower and join three others already mated to the Boeing Delta II rocket that will launch the Deep Impact spacecraft. A NASA Discovery mission, Deep Impact will probe beneath the surface of Comet Tempel 1 on July 4, 2005, when the comet is 83 million miles from Earth, and reveal the secrets of its interior. After releasing an impactor on a course to hit the comet’s sunlit side, Deep Impact’s flyby spacecraft will collect pictures and data of how the crater forms, measure the crater’s depth and diameter, as well as the composition of the interior of the crater and any material thrown out, and determine the changes in natural outgassing produced by the impact. It will send the data back to Earth through the antennas of the Deep Space Network.

KENNEDY SPACE CENTER, FLA. - The Boeing Delta II rocket with its complement of nine Solid Rocket Boosters stands complete alongside the gantry. The Delta II will launch the Deep Impact spacecraft, scheduled for no earlier than Jan. 8, 2005. Below the rocket is the flame trench, and in the foreground is the overflow pool. A NASA Discovery mission, Deep Impact will probe beneath the surface of Comet Tempel 1 on July 4, 2005, when the comet is 83 million miles from Earth, and reveal the secrets of its interior. After releasing an impactor on a course to hit the comet’s sunlit side, Deep Impact’s flyby spacecraft will collect pictures and data of how the crater forms, measure the crater’s depth and diameter, as well as the composition of the interior of the crater and any material thrown out, and determine the changes in natural outgassing produced by the impact. It will send the data back to Earth through the antennas of the Deep Space Network.

KENNEDY SPACE CENTER, FLA. - On Launch Pad 17-B at Cape Canaveral Air Force Station, workers check areas of the second stage as it is mated to the Boeing Delta II rocket. The Delta II will launch NASA’s Deep Impact spacecraft. A NASA Discovery mission, Deep Impact will probe beneath the surface of Comet Tempel 1 on July 4, 2005, when the comet is 83 million miles from Earth, and reveal the secrets of its interior. After releasing an impactor on a course to hit the comet’s sunlit side, Deep Impact’s flyby spacecraft will collect pictures and data of how the crater forms, measure the crater’s depth and diameter, as well as the composition of the interior of the crater and any material thrown out, and determine the changes in natural outgassing produced by the impact. It will send the data back to Earth through the antennas of the Deep Space Network.

KENNEDY SPACE CENTER, FLA. - On Launch Pad 17-B at Cape Canaveral Air Force Station, the second stage of the Boeing Delta II rocket arrives at the mobile service tower for mating to the rocket. The Delta II will launch NASA’s Deep Impact spacecraft. A NASA Discovery mission, Deep Impact will probe beneath the surface of Comet Tempel 1 on July 4, 2005, when the comet is 83 million miles from Earth, and reveal the secrets of its interior. After releasing an impactor on a course to hit the comet’s sunlit side, Deep Impact’s flyby spacecraft will collect pictures and data of how the crater forms, measure the crater’s depth and diameter, as well as the composition of the interior of the crater and any material thrown out, and determine the changes in natural outgassing produced by the impact. It will send the data back to Earth through the antennas of the Deep Space Network.

KENNEDY SPACE CENTER, FLA. - On Launch Pad 17-B at Cape Canaveral Air Force Station, workers help guide the second stage of the Boeing Delta II rocket as it begins the lift up the mobile service tower. The element will be mated to the Delta II, which will launch NASA’s Deep Impact spacecraft. A NASA Discovery mission, Deep Impact will probe beneath the surface of Comet Tempel 1 on July 4, 2005, when the comet is 83 million miles from Earth, and reveal the secrets of its interior. After releasing an impactor on a course to hit the comet’s sunlit side, Deep Impact’s flyby spacecraft will collect pictures and data of how the crater forms, measure the crater’s depth and diameter, as well as the composition of the interior of the crater and any material thrown out, and determine the changes in natural outgassing produced by the impact. It will send the data back to Earth through the antennas of the Deep Space Network.

KENNEDY SPACE CENTER, FLA. - The mobile service tower with the final set of Solid Rocket Boosters (SRBs) rolls toward the Boeing Delta II rocket (in the background). The SRBs will be mated to the rocket, joining others for a complement of nine, to launch the Deep Impact spacecraft, scheduled for no earlier than Jan. 8, 2005. A NASA Discovery mission, Deep Impact will probe beneath the surface of Comet Tempel 1 on July 4, 2005, when the comet is 83 million miles from Earth, and reveal the secrets of its interior. After releasing an impactor on a course to hit the comet’s sunlit side, Deep Impact’s flyby spacecraft will collect pictures and data of how the crater forms, measure the crater’s depth and diameter, as well as the composition of the interior of the crater and any material thrown out, and determine the changes in natural outgassing produced by the impact. It will send the data back to Earth through the antennas of the Deep Space Network.

KENNEDY SPACE CENTER, FLA. - On Launch Pad 17-B, Cape Canaveral Air Force Station, Fla., the first of a second set of three Solid Rocket Boosters (SRBs) arrives. Three SRBs have already been hoisted up the mobile service tower and mated to the Boeing Delta II rocket that will launch the Deep Impact spacecraft. A NASA Discovery mission, Deep Impact will probe beneath the surface of Comet Tempel 1 on July 4, 2005, when the comet is 83 million miles from Earth, and reveal the secrets of its interior. After releasing an impactor on a course to hit the comet’s sunlit side, Deep Impact’s flyby spacecraft will collect pictures and data of how the crater forms, measure the crater’s depth and diameter, as well as the composition of the interior of the crater and any material thrown out, and determine the changes in natural outgassing produced by the impact. It will send the data back to Earth through the antennas of the Deep Space Network.

KENNEDY SPACE CENTER, FLA. - At Astrotech Space Operations in Titusville, Fla., the flight battery has been installed on the Deep Impact flyby spacecraft. About the size of a Ford Explorer, the flyby spacecraft is three-axis stabilized and uses a fixed solar array and a small NiH2 battery for its power system. A NASA Discovery mission, Deep Impact will probe beneath the surface of Comet Tempel 1 on July 4, 2005, when the comet is 83 million miles from Earth. During the encounter phase when the comet collides with the impactor projectile propelled into its path, the spacecraft’s high-gain antenna will transmit near-real-time images of the impact back to Earth. The spacecraft is scheduled to launch Jan. 8 aboard a Boeing Delta II rocket from Launch Complex 17-B at Cape Canaveral Air Force Station, Fla.

KENNEDY SPACE CENTER, FLA. - On Launch Pad 17-B, Cape Canaveral Air Force Station, Fla., the mobile service tower with a second set of three Solid Rocket Boosters (SRBs) is moved toward the Boeing Delta II rocket for mating. A final set of three SRBs is yet to be added. A NASA Discovery mission, Deep Impact will probe beneath the surface of Comet Tempel 1 on July 4, 2005, when the comet is 83 million miles from Earth, and reveal the secrets of its interior. After releasing an impactor on a course to hit the comet’s sunlit side, Deep Impact’s flyby spacecraft will collect pictures and data of how the crater forms, measure the crater’s depth and diameter, as well as the composition of the interior of the crater and any material thrown out, and determine the changes in natural outgassing produced by the impact. It will send the data back to Earth through the antennas of the Deep Space Network.

KENNEDY SPACE CENTER, FLA. - Ball Aerospace technicians at Astrotech Space Operations in Titusville, Fla., take a final look at the flight battery before moving and installing it on the Deep Impact flyby spacecraft. About the size of a Ford Explorer, the flyby spacecraft is three-axis stabilized and uses a fixed solar array and a small NiH2 battery for its power system. A NASA Discovery mission, Deep Impact will probe beneath the surface of Comet Tempel 1 on July 4, 2005, when the comet is 83 million miles from Earth. During the encounter phase when the comet collides with the impactor projectile propelled into its path, the spacecraft’s high-gain antenna will transmit near-real-time images of the impact back to Earth. The spacecraft is scheduled to launch Jan. 8 aboard a Boeing Delta II rocket from Launch Complex 17-B at Cape Canaveral Air Force Station, Fla.

KENNEDY SPACE CENTER, FLA. - At Astrotech Space Operations in Titusville, Fla., the flight battery has been installed on the Deep Impact flyby spacecraft. About the size of a Ford Explorer, the flyby spacecraft is three-axis stabilized and uses a fixed solar array and a small NiH2 battery for its power system. A NASA Discovery mission, Deep Impact will probe beneath the surface of Comet Tempel 1 on July 4, 2005, when the comet is 83 million miles from Earth. During the encounter phase when the comet collides with the impactor projectile propelled into its path, the spacecraft’s high-gain antenna will transmit near-real-time images of the impact back to Earth. The spacecraft is scheduled to launch Jan. 8 aboard a Boeing Delta II rocket from Launch Complex 17-B at Cape Canaveral Air Force Station, Fla.

KENNEDY SPACE CENTER, FLA. - On Launch Pad 17-B at Cape Canaveral Air Force Station, workers help guide the second stage of the Boeing Delta II rocket as it is raised to vertical. The element will be lifted up the mobile service tower for mating to the Delta II, which will launch NASA’s Deep Impact spacecraft. A NASA Discovery mission, Deep Impact will probe beneath the surface of Comet Tempel 1 on July 4, 2005, when the comet is 83 million miles from Earth, and reveal the secrets of its interior. After releasing an impactor on a course to hit the comet’s sunlit side, Deep Impact’s flyby spacecraft will collect pictures and data of how the crater forms, measure the crater’s depth and diameter, as well as the composition of the interior of the crater and any material thrown out, and determine the changes in natural outgassing produced by the impact. It will send the data back to Earth through the antennas of the Deep Space Network.

KENNEDY SPACE CENTER, FLA. - The flight battery for the Deep Impact flyby spacecraft awaits installation at Astrotech Space Operations in Titusville, Fla. About the size of a Ford Explorer, the flyby spacecraft is three-axis stabilized and uses a fixed solar array and a small NiH2 battery for its power system. A NASA Discovery mission, Deep Impact will probe beneath the surface of Comet Tempel 1 on July 4, 2005, when the comet is 83 million miles from Earth. During the encounter phase when the comet collides with the impactor projectile propelled into its path, the spacecraft’s high-gain antenna will transmit near-real-time images of the impact back to Earth. The spacecraft is scheduled to launch Jan. 8 aboard a Boeing Delta II rocket from Launch Complex 17-B at Cape Canaveral Air Force Station, Fla.

KENNEDY SPACE CENTER, FLA. - On Launch Pad 17-B at Cape Canaveral Air Force Station, the second stage of the Boeing Delta II rocket is moved toward the opening under which is the Boeing Delta II rocket. The second stage will be mated to the Delta II, which will launch NASA’s Deep Impact spacecraft. A NASA Discovery mission, Deep Impact will probe beneath the surface of Comet Tempel 1 on July 4, 2005, when the comet is 83 million miles from Earth, and reveal the secrets of its interior. After releasing an impactor on a course to hit the comet’s sunlit side, Deep Impact’s flyby spacecraft will collect pictures and data of how the crater forms, measure the crater’s depth and diameter, as well as the composition of the interior of the crater and any material thrown out, and determine the changes in natural outgassing produced by the impact. It will send the data back to Earth through the antennas of the Deep Space Network.

KENNEDY SPACE CENTER, FLA. - In the pre-dawn hours on Launch Pad 17-B at Cape Canaveral Air Force Station, the mobile service tower is silhouetted with the Boeing Delta II rocket that will launch NASA’s Deep Impact spacecraft. The Delta II waits for the arrival and mating of the second stage. A NASA Discovery mission, Deep Impact will probe beneath the surface of Comet Tempel 1 on July 4, 2005, when the comet is 83 million miles from Earth, and reveal the secrets of its interior. After releasing an impactor on a course to hit the comet’s sunlit side, Deep Impact’s flyby spacecraft will collect pictures and data of how the crater forms, measure the crater’s depth and diameter, as well as the composition of the interior of the crater and any material thrown out, and determine the changes in natural outgassing produced by the impact. It will send the data back to Earth through the antennas of the Deep Space Network.

KENNEDY SPACE CENTER, FLA. - On Launch Pad 17-B at Cape Canaveral Air Force Station, the second stage of the Boeing Delta II rocket is lifted up the mobile service tower. The element will be mated to the Delta II, which will launch NASA’s Deep Impact spacecraft. A NASA Discovery mission, Deep Impact will probe beneath the surface of Comet Tempel 1 on July 4, 2005, when the comet is 83 million miles from Earth, and reveal the secrets of its interior. After releasing an impactor on a course to hit the comet’s sunlit side, Deep Impact’s flyby spacecraft will collect pictures and data of how the crater forms, measure the crater’s depth and diameter, as well as the composition of the interior of the crater and any material thrown out, and determine the changes in natural outgassing produced by the impact. It will send the data back to Earth through the antennas of the Deep Space Network.

KENNEDY SPACE CENTER, FLA. - Ball Aerospace technicians check the flight battery for the Deep Impact flyby spacecraft before installation at Astrotech Space Operations in Titusville, Fla. About the size of a Ford Explorer, the flyby spacecraft is three-axis stabilized and uses a fixed solar array and a small NiH2 battery for its power system. A NASA Discovery mission, Deep Impact will probe beneath the surface of Comet Tempel 1 on July 4, 2005, when the comet is 83 million miles from Earth. During the encounter phase when the comet collides with the impactor projectile propelled into its path, the spacecraft’s high-gain antenna will transmit near-real-time images of the impact back to Earth. The spacecraft is scheduled to launch Jan. 8 aboard a Boeing Delta II rocket from Launch Complex 17-B at Cape Canaveral Air Force Station, Fla.