Credit: NASA/Sophia Roberts", "items": [ { "id": 206133, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 855344, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a014300/a014354/Unassembled_Parts_of_ComPair.01740_print.jpg", "filename": "Unassembled_Parts_of_ComPair.01740_print.jpg", "media_type": "Image", "alt_text": "Carolyn Kierans, principal investigator for the ComPair balloon mission at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, works on the instrument in this video. First, she assembles a layer of the tracker, which is housed in an aluminum casing. Next, she shows one of the tracker’s silicon detectors. Then she takes the lid off the tracker.Credit: NASA/Sophia Roberts", "width": 1024, "height": 540, "pixels": 552960 } }, { "id": 206134, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 855345, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a014300/a014354/Unassembled_Parts_of_ComPair.01740_searchweb.png", "filename": "Unassembled_Parts_of_ComPair.01740_searchweb.png", "media_type": "Image", "alt_text": "Carolyn Kierans, principal investigator for the ComPair balloon mission at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, works on the instrument in this video. First, she assembles a layer of the tracker, which is housed in an aluminum casing. Next, she shows one of the tracker’s silicon detectors. Then she takes the lid off the tracker.Credit: NASA/Sophia Roberts", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 206135, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 855346, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a014300/a014354/Unassembled_Parts_of_ComPair.01740_thm.png", "filename": "Unassembled_Parts_of_ComPair.01740_thm.png", "media_type": "Image", "alt_text": "Carolyn Kierans, principal investigator for the ComPair balloon mission at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, works on the instrument in this video. First, she assembles a layer of the tracker, which is housed in an aluminum casing. Next, she shows one of the tracker’s silicon detectors. Then she takes the lid off the tracker.Credit: NASA/Sophia Roberts", "width": 80, "height": 40, "pixels": 3200 } }, { "id": 206132, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 855343, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a014300/a014354/Unassembled_Parts_of_ComPair.mp4", "filename": "Unassembled_Parts_of_ComPair.mp4", "media_type": "Movie", "alt_text": "Carolyn Kierans, principal investigator for the ComPair balloon mission at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, works on the instrument in this video. First, she assembles a layer of the tracker, which is housed in an aluminum casing. Next, she shows one of the tracker’s silicon detectors. Then she takes the lid off the tracker.Credit: NASA/Sophia Roberts", "width": 4096, "height": 2160, "pixels": 8847360 } }, { "id": 206136, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 855379, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a014300/a014354/Unassembled_Parts_of_ComPair.webm", "filename": "Unassembled_Parts_of_ComPair.webm", "media_type": "Movie", "alt_text": "Carolyn Kierans, principal investigator for the ComPair balloon mission at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, works on the instrument in this video. First, she assembles a layer of the tracker, which is housed in an aluminum casing. Next, she shows one of the tracker’s silicon detectors. Then she takes the lid off the tracker.Credit: NASA/Sophia Roberts", "width": 4096, "height": 2160, "pixels": 8847360 } } ], "extra_data": {} }, { "id": 312366, "url": "https://svs.gsfc.nasa.gov/14354/#media_group_312366", "widget": "Basic text with HTML", "title": "", "caption": "", "description": "Engineers and scientists assembled and tested NASA’s ComPair (short for Compton Pair) balloon instrument in preparation for its scheduled flight in August 2023 as part of NASA’s fall balloon campaign from Fort Sumner, New Mexico. ComPair’s goal is to test new technologies for studying gamma rays, the highest-energy form of light. The imagery here was captured at different stages of the mission’s assembly and testing in 2022 and 2023.
ComPair is designed to detect gamma rays with energies between 200,000 and 20 million electron volts. (For comparison, the energy of visible light is 2 to 3 electron volts.) Supernovae and gamma-ray bursts, the most powerful explosions in the cosmos, glow brightest in this range, as do the most massive and distant active galaxies, which are powered by supermassive black holes.
ComPair gets its name from the two ways it detects and measures gamma rays: Compton scattering and pair production. Compton scattering occurs when light hits a particle, such an electron, and transfers some energy to it. Pair production happens when a gamma ray grazes the nucleus of an atom. The interaction converts the gamma ray into a pair of particles – an electron and its antimatter counterpart, a positron.
The ComPair instrument has four major components:
1. A tracker containing 10 layers of silicon detectors that determine the position of incoming gamma rays.
2. A high-resolution calorimeter that precisely measures the lower-energy Compton-scattered gamma rays.
3. Another calorimeter that measures the higher energies of electron-positron pairs.
4. An anticoincidence detector that detects the entry of high-energy charged particles called cosmic rays, allowing ComPair's other instruments to ignore them.
ComPair is a collaboration among Goddard, the Naval Research Laboratory in Washington, Brookhaven National Laboratory in Upton, New York, and Los Alamos National Laboratory in New Mexico.", "items": [], "extra_data": {} }, { "id": 312368, "url": "https://svs.gsfc.nasa.gov/14354/#media_group_312368", "widget": "Video player", "title": "", "caption": "", "description": "This video shows engineers and scientists at Goddard testing ComPair’s high-resolution, low-energy calorimeter. The first shot shows a radioactive source used to determine if the calorimeter correctly detects gamma rays. The second shot pans down from the source to the 10-layer tracker on top of the calorimeter. The third, fourth, and fifth shots show data readouts from the calorimeter. The sixth shot shows a pan up from ComPair's multiple power sources to its instruments on the tabletop. Lucas Smith (University of Maryland, College Park) watches the data readouts from the calorimeter. The seventh shot shows some of the ComPair peripheral electronics, specifically the trigger module that aligns the data from each subsystem.
Credit: NASA/Sophia Roberts", "items": [ { "id": 206139, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 855391, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a014300/a014354/Radioactive_Source_Testing_of_ComPair.02145_print.jpg", "filename": "Radioactive_Source_Testing_of_ComPair.02145_print.jpg", "media_type": "Image", "alt_text": "This video shows engineers and scientists at Goddard testing ComPair’s high-resolution, low-energy calorimeter. The first shot shows a radioactive source used to determine if the calorimeter correctly detects gamma rays. The second shot pans down from the source to the 10-layer tracker on top of the calorimeter. The third, fourth, and fifth shots show data readouts from the calorimeter. The sixth shot shows a pan up from ComPair's multiple power sources to its instruments on the tabletop. Lucas Smith (University of Maryland, College Park) watches the data readouts from the calorimeter. The seventh shot shows some of the ComPair peripheral electronics, specifically the trigger module that aligns the data from each subsystem.Credit: NASA/Sophia Roberts", "width": 1024, "height": 576, "pixels": 589824 } }, { "id": 206137, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 855347, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a014300/a014354/Radioactive_Source_Testing_of_ComPair.mp4", "filename": "Radioactive_Source_Testing_of_ComPair.mp4", "media_type": "Movie", "alt_text": "This video shows engineers and scientists at Goddard testing ComPair’s high-resolution, low-energy calorimeter. The first shot shows a radioactive source used to determine if the calorimeter correctly detects gamma rays. The second shot pans down from the source to the 10-layer tracker on top of the calorimeter. The third, fourth, and fifth shots show data readouts from the calorimeter. The sixth shot shows a pan up from ComPair's multiple power sources to its instruments on the tabletop. Lucas Smith (University of Maryland, College Park) watches the data readouts from the calorimeter. The seventh shot shows some of the ComPair peripheral electronics, specifically the trigger module that aligns the data from each subsystem.Credit: NASA/Sophia Roberts", "width": 3840, "height": 2160, "pixels": 8294400 } }, { "id": 206138, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 855380, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a014300/a014354/Radioactive_Source_Testing_of_ComPair.webm", "filename": "Radioactive_Source_Testing_of_ComPair.webm", "media_type": "Movie", "alt_text": "This video shows engineers and scientists at Goddard testing ComPair’s high-resolution, low-energy calorimeter. The first shot shows a radioactive source used to determine if the calorimeter correctly detects gamma rays. The second shot pans down from the source to the 10-layer tracker on top of the calorimeter. The third, fourth, and fifth shots show data readouts from the calorimeter. The sixth shot shows a pan up from ComPair's multiple power sources to its instruments on the tabletop. Lucas Smith (University of Maryland, College Park) watches the data readouts from the calorimeter. The seventh shot shows some of the ComPair peripheral electronics, specifically the trigger module that aligns the data from each subsystem.Credit: NASA/Sophia Roberts", "width": 3840, "height": 2160, "pixels": 8294400 } } ], "extra_data": {} }, { "id": 312369, "url": "https://svs.gsfc.nasa.gov/14354/#media_group_312369", "widget": "Video player", "title": "", "caption": "", "description": "Kierans prepares the instrument’s tracker for testing in a small thermal vacuum chamber at Goddard in this video. The first two shots show her opening the door to the chamber, which is used to test how the instrument works in temperatures from minus 76 degrees Fahrenheit (60 degrees below zero Celsius) to 86 F (30 C). The third shot shows Kierans and Sambid Wasti (Catholic University of America) moving the tracker into the chamber.
Credit: NASA/Sophia Roberts", "items": [ { "id": 206142, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 855392, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a014300/a014354/Before_Thermal_Vacuum_Testing_of_ComPair.00600_print.jpg", "filename": "Before_Thermal_Vacuum_Testing_of_ComPair.00600_print.jpg", "media_type": "Image", "alt_text": "Kierans prepares the instrument’s tracker for testing in a small thermal vacuum chamber at Goddard in this video. The first two shots show her opening the door to the chamber, which is used to test how the instrument works in temperatures from minus 76 degrees Fahrenheit (60 degrees below zero Celsius) to 86 F (30 C). The third shot shows Kierans and Sambid Wasti (Catholic University of America) moving the tracker into the chamber.Credit: NASA/Sophia Roberts", "width": 1024, "height": 540, "pixels": 552960 } }, { "id": 206143, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 855393, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a014300/a014354/Before_Thermal_Vacuum_Testing_of_ComPair.00600_searchweb.png", "filename": "Before_Thermal_Vacuum_Testing_of_ComPair.00600_searchweb.png", "media_type": "Image", "alt_text": "Kierans prepares the instrument’s tracker for testing in a small thermal vacuum chamber at Goddard in this video. The first two shots show her opening the door to the chamber, which is used to test how the instrument works in temperatures from minus 76 degrees Fahrenheit (60 degrees below zero Celsius) to 86 F (30 C). The third shot shows Kierans and Sambid Wasti (Catholic University of America) moving the tracker into the chamber.Credit: NASA/Sophia Roberts", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 206144, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 855394, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a014300/a014354/Before_Thermal_Vacuum_Testing_of_ComPair.00600_thm.png", "filename": "Before_Thermal_Vacuum_Testing_of_ComPair.00600_thm.png", "media_type": "Image", "alt_text": "Kierans prepares the instrument’s tracker for testing in a small thermal vacuum chamber at Goddard in this video. The first two shots show her opening the door to the chamber, which is used to test how the instrument works in temperatures from minus 76 degrees Fahrenheit (60 degrees below zero Celsius) to 86 F (30 C). The third shot shows Kierans and Sambid Wasti (Catholic University of America) moving the tracker into the chamber.Credit: NASA/Sophia Roberts", "width": 80, "height": 40, "pixels": 3200 } }, { "id": 206140, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 855348, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a014300/a014354/Before_Thermal_Vacuum_Testing_of_ComPair.mp4", "filename": "Before_Thermal_Vacuum_Testing_of_ComPair.mp4", "media_type": "Movie", "alt_text": "Kierans prepares the instrument’s tracker for testing in a small thermal vacuum chamber at Goddard in this video. The first two shots show her opening the door to the chamber, which is used to test how the instrument works in temperatures from minus 76 degrees Fahrenheit (60 degrees below zero Celsius) to 86 F (30 C). The third shot shows Kierans and Sambid Wasti (Catholic University of America) moving the tracker into the chamber.Credit: NASA/Sophia Roberts", "width": 4096, "height": 2160, "pixels": 8847360 } }, { "id": 206141, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 855381, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a014300/a014354/Before_Thermal_Vacuum_Testing_of_ComPair.webm", "filename": "Before_Thermal_Vacuum_Testing_of_ComPair.webm", "media_type": "Movie", "alt_text": "Kierans prepares the instrument’s tracker for testing in a small thermal vacuum chamber at Goddard in this video. The first two shots show her opening the door to the chamber, which is used to test how the instrument works in temperatures from minus 76 degrees Fahrenheit (60 degrees below zero Celsius) to 86 F (30 C). The third shot shows Kierans and Sambid Wasti (Catholic University of America) moving the tracker into the chamber.Credit: NASA/Sophia Roberts", "width": 4096, "height": 2160, "pixels": 8847360 } } ], "extra_data": {} }, { "id": 312370, "url": "https://svs.gsfc.nasa.gov/14354/#media_group_312370", "widget": "Video player", "title": "", "caption": "", "description": "Kierans checks on the instrument’s tracker after testing in a thermal vacuum chamber at Goddard in this video. In the first shot, she opens the chamber door and leans in with a light to look around the tracker. In the second shot, she examines the tracker more closely, moving aside coils of cables. The tracker uses five power supplies, all with different voltages. The result is a plethora of cables that require careful management.
Credit: NASA/Sophia Roberts", "items": [ { "id": 206147, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 855395, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a014300/a014354/After_Thermal_Vacuum_Testing_of_ComPair.01680_print.jpg", "filename": "After_Thermal_Vacuum_Testing_of_ComPair.01680_print.jpg", "media_type": "Image", "alt_text": "Kierans checks on the instrument’s tracker after testing in a thermal vacuum chamber at Goddard in this video. In the first shot, she opens the chamber door and leans in with a light to look around the tracker. In the second shot, she examines the tracker more closely, moving aside coils of cables. The tracker uses five power supplies, all with different voltages. The result is a plethora of cables that require careful management.Credit: NASA/Sophia Roberts", "width": 1024, "height": 540, "pixels": 552960 } }, { "id": 206145, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 855349, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a014300/a014354/After_Thermal_Vacuum_Testing_of_ComPair.mp4", "filename": "After_Thermal_Vacuum_Testing_of_ComPair.mp4", "media_type": "Movie", "alt_text": "Kierans checks on the instrument’s tracker after testing in a thermal vacuum chamber at Goddard in this video. In the first shot, she opens the chamber door and leans in with a light to look around the tracker. In the second shot, she examines the tracker more closely, moving aside coils of cables. The tracker uses five power supplies, all with different voltages. The result is a plethora of cables that require careful management.Credit: NASA/Sophia Roberts", "width": 4096, "height": 2160, "pixels": 8847360 } }, { "id": 206146, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 855382, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a014300/a014354/After_Thermal_Vacuum_Testing_of_ComPair.webm", "filename": "After_Thermal_Vacuum_Testing_of_ComPair.webm", "media_type": "Movie", "alt_text": "Kierans checks on the instrument’s tracker after testing in a thermal vacuum chamber at Goddard in this video. In the first shot, she opens the chamber door and leans in with a light to look around the tracker. In the second shot, she examines the tracker more closely, moving aside coils of cables. The tracker uses five power supplies, all with different voltages. The result is a plethora of cables that require careful management.Credit: NASA/Sophia Roberts", "width": 4096, "height": 2160, "pixels": 8847360 } } ], "extra_data": {} }, { "id": 312371, "url": "https://svs.gsfc.nasa.gov/14354/#media_group_312371", "widget": "Single image", "title": "", "caption": "", "description": "In this image, Smith holds up part of ComPair's high-resolution low-energy calorimeter, which uses a cadmium-zinc-telluride compound to detect the energy deposited in gamma-ray interactions.
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Lepsch", "employer": "ADNET Systems, Inc." } ] } ], "missions": [], "series": [], "tapes": [], "papers": [], "datasets": [], "nasa_science_categories": [ "Universe" ], "keywords": [ "Ast", "Astrophysics", "B-Roll", "Balloon", "Gamma Ray" ], "recommended_pages": [], "related": [ { "id": 14991, "url": "https://svs.gsfc.nasa.gov/14991/", "page_type": "Produced Video", "title": "Argonne Assembles, Tests Early ComPair-2 Hardware", "description": "Tim Cundiff, an engineering specialist at Argonne National Laboratory in Lemont, Illinois, monitors the automated wire bond of a ComPair-2 detector layer in April 2025. Image courtesy of Argonne National LaboratoryAlt text: A man in a lab uses a microscope.Image description: A man in a white clean suit, gloves, safety glasses, and a hairnet sits in front of a piece of machinery in a laboratory and peers into a microscope. Behind him is a long bench covered in scientific equipment and computers. In front of him, inside the machinery, are what look like two black treads that loop in and out of frame. || 34340D_0388_PSE_NASA_Goddard_Gamma-Ray_Tracker_Assembly_Process_WEB_16x9.jpg (2000x1125) [1.1 MB] || 34340D_0388_PSE_NASA_Goddard_Gamma-Ray_Tracker_Assembly_Process_WEB_16x9_searchweb.png (320x180) [124.6 KB] || 34340D_0388_PSE_NASA_Goddard_Gamma-Ray_Tracker_Assembly_Process_WEB_16x9_thm.png (80x40) [27.3 KB] || ", "release_date": "2026-03-20T12:00:00-04:00", "update_date": "2026-03-20T12:22:37-04:00", "main_image": { "id": 1202609, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a014900/a014991/34340D_0388_PSE_NASA_Goddard_Gamma-Ray_Tracker_Assembly_Process_WEB_16x9.jpg", "filename": "34340D_0388_PSE_NASA_Goddard_Gamma-Ray_Tracker_Assembly_Process_WEB_16x9.jpg", "media_type": "Image", "alt_text": "Tim Cundiff, an engineering specialist at Argonne National Laboratory in Lemont, Illinois, monitors the automated wire bond of a ComPair-2 detector layer in April 2025. \rImage courtesy of Argonne National Laboratory\rAlt text: A man in a lab uses a microscope.\rImage description: A man in a white clean suit, gloves, safety glasses, and a hairnet sits in front of a piece of machinery in a laboratory and peers into a microscope. Behind him is a long bench covered in scientific equipment and computers. In front of him, inside the machinery, are what look like two black treads that loop in and out of frame.", "width": 2000, "height": 1125, "pixels": 2250000 } }, { "id": 14980, "url": "https://svs.gsfc.nasa.gov/14980/", "page_type": "Produced Video", "title": "Prototype ComPair-2 Gamma-Ray Detectors Complete Thermal Vacuum Testing", "description": "Prototype gamma-ray detectors for the ComPair-2 mission rests in a thermal vacuum chamber after testing in June 2025 at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. The ComPair-2 team tested the detectors’ performance at hot and cold temperatures over the course of a week and the overall survivability of the layer itself. Credit: NASA/Sophia RobertsAlt text: A piece of equipment sits inside a chamber in a lab. Image description: A cylindrical metal chamber at the center of the image has its door swung all the way open. Inside are silver-wrapped ComPair-2 detectors attached to many copper-colored wires. The chamber is in a lab with white walls and has tubes, wires, and other pieces of equipment attached. || ComPair2_TVAC-1-small.jpg (4096x2732) [3.2 MB] || ComPair2_TVAC-1.jpg (8192x5464) [30.6 MB] || ", "release_date": "2026-02-26T12:00:00-05:00", "update_date": "2026-02-26T12:02:25-05:00", "main_image": { "id": 1202201, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a014900/a014980/ComPair2_TVAC-2-small_searchweb.png", "filename": "ComPair2_TVAC-2-small_searchweb.png", "media_type": "Image", "alt_text": "Iker Liceaga-Indart, a mechanical engineer at NASA Goddard, peers into the thermal vacuum chamber to evaluate the prototype after testing. \rCredit: NASA/Sophia Roberts\rAlt text: A man investigates a chamber in a lab.\rImage description: A man in a navy-blue polo shirt kneels to look into a cylindrical metal chamber in a lab. The chamber door is fully open and inside are silver-wrapped ComPair-2 detectors attached to many copper-colored wires.", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 14794, "url": "https://svs.gsfc.nasa.gov/14794/", "page_type": "Produced Video", "title": "Developing NASA’s ComPair-2 Detectors", "description": "ComPair-2 will host a gamma-ray tracker with 10 layers, each with 380 silicon detectors, like the engineering test unit shown here. This trial version allows the mission team to test the electronics, measure how well the detectors work together, and develop assembly procedures for each layer. Credit: NASA/Sophia RobertsAlt text: Scientific hardware on a table Image description: A square piece of scientific hardware rests on a table on top of a silver cover. The hardware has a white board on the bottom with a silver peg at each corner. Inside the pegs is a black square with orange and green electronic components. The green runs along the bottom of the square and takes up the left corner of the black square. The orange electronic components run in 20 stripes along the black square. The orange is interspersed with black. || ComPair2-3_print.jpg (1024x683) [631.9 KB] || ComPair2-3.jpg (8192x5464) [29.1 MB] || ComPair2-3_searchweb.png (320x180) [124.5 KB] || ComPair2-3_web.png (320x213) [137.6 KB] || ComPair2-3_thm.png [28.0 KB] || ", "release_date": "2025-03-11T00:00:00-04:00", "update_date": "2025-03-11T12:44:33-04:00", "main_image": { "id": 1153310, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a014700/a014794/Daniel_Violette_ComPair2-1_print.jpg", "filename": "Daniel_Violette_ComPair2-1_print.jpg", "media_type": "Image", "alt_text": "Dan Violette, a postdoctoral fellow at NASA Goddard, tips the engineering test unit toward the camera in the ComPair-2 lab. The black carbon fiber frame was fabricated at NASA’s Marshall Space Flight Center in Huntsville, Alabama, and machined and assembled at Goddard.\rCredit: NASA/Sophia Roberts\rAlt text: A man holds a square piece of electronic equipment\rImage description: A man in a long-sleeved blue lab coat tips a square piece of electronic equipment toward the camera. The square has a white base, with a slightly smaller black square on top. Orange and black rows cover the black square, with green along the right side and covering the bottom right corner. The square rests on a lab bench covered in silver material.", "width": 1024, "height": 712, "pixels": 729088 } }, { "id": 14373, "url": "https://svs.gsfc.nasa.gov/14373/", "page_type": "Infographic", "title": "ComPair Infographic", "description": "Explore this infographic to learn more about ComPair and scientific ballooning.Credit: NASA’s Goddard Space Flight CenterMachine-readable PDF copy || ComPair_Infographic_Final.jpg (5100x6600) [3.3 MB] || ComPair_Infographic_Final.png (5100x6600) [11.7 MB] || ComPair_Infographic_Final-half.jpg (2550x3300) [1.3 MB] || ComPair_Infographic_Final-half.png (2550x3300) [3.8 MB] || ", "release_date": "2023-08-08T10:00:00-04:00", "update_date": "2023-08-09T13:12:03-04:00", "main_image": { "id": 857254, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a014300/a014373/ComPair_Thumbnail_print.jpg", "filename": "ComPair_Thumbnail_print.jpg", "media_type": "Image", "alt_text": "These elements from the infographic above show the ComPair instrument on the left and its location on the gondola on the right.Credit: NASA's Goddard Space Flight Center", "width": 1024, "height": 576, "pixels": 589824 } }, { "id": 14372, "url": "https://svs.gsfc.nasa.gov/14372/", "page_type": "B-Roll", "title": "ComPair Thermal Vacuum Photos", "description": "Team members work on the ComPair balloon instrument before it begins testing in a thermal vacuum chamber at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. ComPair project manager Regina Caputo (front right), graduate student Nicholas Kirschner (George Washington University, left), and research scientist Nicholas Cannady (University of Maryland Baltimore County, rear) examine ComPair's various components to determine what needs to be “harnessed,” or connected via cable to power systems and the onboard computer.Credit: NASA/Scott Wiessinger || ComPair_TVac_IMG_2141.png (5319x3546) [30.9 MB] || ComPair_TVac_IMG_2141.jpg (5319x3546) [6.0 MB] || ComPair_TVac_IMG_2141_half.jpg (2659x1773) [1.4 MB] || ", "release_date": "2023-07-20T10:00:00-04:00", "update_date": "2023-07-25T08:45:11-04:00", "main_image": { "id": 856273, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a014300/a014372/ComPair_TVac_IMG_2159_searchweb.png", "filename": "ComPair_TVac_IMG_2159_searchweb.png", "media_type": "Image", "alt_text": "Kirschner (left), Caputo (right), and Cannady (rear) continue to harness ComPair's four main components: tracker, high-resolution low-energy calorimeter, high-energy calorimeter, and anticoincidence detector.Credit: NASA/Scott Wiessinger", "width": 320, "height": 180, "pixels": 57600 } } ], "sources": [], "products": [], "newer_versions": [], "older_versions": [], "alternate_versions": [] }