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Dark matter, after all, is the invisible glue that makes up the bulk of the universe’s contents. All galaxies are dominated by it; in fact, galaxies are thought to form inside immense halos of dark matter. So, finding a galaxy lacking the invisible stuff is an extraordinary claim that challenges conventional wisdom. It would have the potential to upset theories of galaxy formation and evolution.For more information, visit https://nasa.gov/hubble. Additional Visualizations:Galaxy Motion Simulation: Credit: ESO/L. Calçada.Dark Matter Simulation: Credit: Additional Visualizations:Galaxy Motion Simulation: Credit: ESO/L. Calçada.Dark Matter Simulation: Credit: Wu, Hahn, Wechsler, Abel(KIPAC), Visualization: Kaehler (KIPAC)Music Credits: \"Aphelion Horizon\" by Alistair Hetherington [PRS] via Atmosphere Music Ltd. 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They found small, dense concentrations of dark matter that bend and magnify light much more strongly than expected.For more information, visit https://nasa.gov/hubble.Visualizations and Additional Footage:ESA/Hubble — Gravitational Lensing AnimationESA/Hubble — Gravitational Lensing Simplified VisualizationR. Wesson/ESO — Very Large Telescope FootageMusic Credits:“On the Path” by Bernhard Hering [GEMA] and Matthias Kruger [GEMA] via Berlin Production Music/Universal Production Music GmbH [GEMA] || ", "release_date": "2020-09-10T14:00:00-04:00", "update_date": "2023-05-03T13:44:43.065741-04:00", "main_image": { "id": 382724, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a013700/a013713/13713_DARK_MATTER_SEARCH_SVS.jpg", "filename": "13713_DARK_MATTER_SEARCH_SVS.jpg", "media_type": "Image", "alt_text": "Master VersionHorizontal version. This is for use on any YouTube or non-YouTube platform where you want to display the video horizontally.", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 12621, "url": "https://svs.gsfc.nasa.gov/12621/", "page_type": "Produced Video", "title": "Star Gives Birth to Possible Black Hole in Hubble and Spitzer Images", "description": "Music credit: \"High Heelz\" by Donn Wilkerson [BMI] and Lance Sumner [BMI]; Killer Tracks BMI; Killer Tracks Production MusicWatch this video on the NASA Goddard YouTube channel. || Hubble_black_hole_birth_thumbnail.png (1920x1080) [3.4 MB] || Hubble_black_hole_birth_thumbnail_print.jpg (1024x576) [163.2 KB] || Hubble_black_hole_birth_thumbnail_searchweb.png (320x180) [126.7 KB] || Hubble_black_hole_birth_thumbnail_thm.png (80x40) [7.9 KB] || Hubble_black_hole_birth_H264.mp4 (1920x1080) [228.3 MB] || Hubble_black_hole_birth_H264.webm (1920x1080) [26.8 MB] || Hubble_black_hole_birth_APR422.mov (1920x1080) [5.8 GB] || Hubble_black_hole_birth.en_US.srt [4.7 KB] || Hubble_black_hole_birth.en_US.vtt [4.7 KB] || ", "release_date": "2017-05-25T13:00:00-04:00", "update_date": "2023-05-03T13:47:39.110026-04:00", "main_image": { "id": 414166, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a012600/a012621/Hubble_black_hole_birth_thumbnail.png", "filename": "Hubble_black_hole_birth_thumbnail.png", "media_type": "Image", "alt_text": "Music credit: \"High Heelz\" by Donn Wilkerson [BMI] and Lance Sumner [BMI]; Killer Tracks BMI; Killer Tracks Production MusicWatch this video on the NASA Goddard YouTube channel.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 12599, "url": "https://svs.gsfc.nasa.gov/12599/", "page_type": "Produced Video", "title": "Hubble's Galaxy-Observing Superpowers", "description": "The Hubble Space Telescope is keeping watch over many, many galaxies using the combined superpowers of its incredible optics and a quirk of nature called gravitational lensing. 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Bottom: Gamma rays convert into hypothetical axion-like particles (green dashes) and back again when they encounter magnetic fields (gray curves). The resulting gamma-ray spectrum (lower curve at right) would show unusual steps and gaps not seen in Fermi data, which means a range of these particles cannot make up a portion of dark matter.Credit: SLAC National Accelerator Laboratory/Chris Smith || ALP_2_sequences.gif (1074x580) [211.8 KB] || ", "release_date": "2016-08-12T13:00:00-04:00", "update_date": "2023-05-03T13:48:24.423680-04:00", "main_image": { "id": 421560, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a012300/a012317/smc_dm_split.jpg", "filename": "smc_dm_split.jpg", "media_type": "Image", "alt_text": "The Small Magellanic Cloud (SMC), at center, is the second-largest satellite galaxy orbiting our own. This image superimposes a photograph of the SMC with one half of a model of its dark matter (right of center). Lighter colors indicate greater density and show a strong concentration toward the galaxy's center. Ninety-five percent of the dark matter is contained within a circle tracing the outer edge of the model shown. In six years of data, Fermi finds no indication of gamma rays from the SMC's dark matter.Credits: Dark matter, R. Caputo et al. 2016; background, Axel Mellinger, Central Michigan University", "width": 1920, "height": 1024, "pixels": 1966080 } }, { "id": 11894, "url": "https://svs.gsfc.nasa.gov/11894/", "page_type": "Produced Video", "title": "Turning Black Holes into Dark Matter Labs", "description": "This video introduces a new computer simulation exploring the connection between two of the most elusive phenomena in the universe, black holes and dark matter. In the visualization, dark matter particles are gray spheres attached to shaded trails representing their motion. Redder trails indicate particles more strongly affected by the black hole's gravitation and closer to its event horizon (black sphere at center, mostly hidden by trails). The ergosphere, where all matter and light must follow the black hole's spin, is shown in teal. 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The particles are shown as gray spheres attached to shaded trails representing their motion. Redder trails indicate particles more strongly affected by the black hole's gravitation and closer to its event horizon (black sphere at center, mostly hidden by trails). The ergosphere, where all matter and light must follow the black hole's spin, is shown in teal. Credit: NASA Goddard Scientific Visualization Studio ", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 10943, "url": "https://svs.gsfc.nasa.gov/10943/", "page_type": "Produced Video", "title": "Fermi Observations of Dwarf Galaxies Provide New Insights on Dark Matter", "description": "There's more to the cosmos than meets the eye. About 80 percent of the matter in the universe is invisible to telescopes, yet its gravitational influence is manifest in the orbital speeds of stars around galaxies and in the motions of clusters of galaxies. Yet, despite decades of effort, no one knows what this \"dark matter\" really is. Many scientists think it's likely that the mystery will be solved with the discovery of new kinds of subatomic particles, types necessarily different from those composing atoms of the ordinary matter all around us. The search to detect and identify these particles is underway in experiments both around the globe and above it. Scientists working with data from NASA's Fermi Gamma-ray Space Telescope have looked for signals from some of these hypothetical particles by zeroing in on 10 small, faint galaxies that orbit our own. Although no signals have been detected, a novel analysis technique applied to two years of data from the observatory's Large Area Telescope (LAT) has essentially eliminated these particle candidates for the first time.WIMPs, or Weakly Interacting Massive Particles, represent a favored class of dark matter candidates. Some WIMPs may mutually annihilate when pairs of them interact, a process expected to produce gamma rays — the most energetic form of light — that the LAT is designed to detect. The team examined two years of LAT-detected gamma rays with energies in the range from 200 million to 100 billion electron volts (GeV) from 10 of the roughly two dozen dwarf galaxies known to orbit the Milky Way. Instead of analyzing the results for each galaxy separately, the scientists developed a statistical technique — they call it a \"joint likelihood analysis\" — that evaluates all of the galaxies at once without merging the data together. No gamma-ray signal consistent with the annihilations expected from four different types of commonly considered WIMP particles was found.For the first time, the results show that WIMP candidates within a specific range of masses and interaction rates cannot be dark matter. A paper detailing these results appeared in the Dec. 9, 2011, issue of Physical Review Letters. || ", "release_date": "2012-04-02T12:30:00-04:00", "update_date": "2024-10-10T00:15:59.099603-04:00", "main_image": { "id": 477680, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010900/a010943/test__left_00999.jpg", "filename": "test__left_00999.jpg", "media_type": "Image", "alt_text": "No one knows what dark matter is, but it constitutes 80 percent of the matter in our universe. By studying numerous dwarf galaxies — satellite systems that orbit our own Milky Way galaxy — NASA's Fermi Gamma-ray Space Telescope has produced some of the strongest limits yet on the nature of the hypothetical particles suspected of making up dark matter. Short, narrated video.Poster image, and dark matter simulations credit: Simulation: Wu, Hahn, Wechsler, Abel(KIPAC), Visualization: Kaehler (KIPAC)Watch this video on the NASAexplorer YouTube channel.For complete transcript, click here.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 10955, "url": "https://svs.gsfc.nasa.gov/10955/", "page_type": "Produced Video", "title": "WIMPs—Weakly Interacting Massive Particles", "description": "Weakly Interacting Massive Particles, or WIMPs, represent one hypothesized class of particles to explain dark matter.They neither absorb nor emit light and don't interact strongly with other particles. 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