Astronomers Just Found a Galaxy Made of Invisible Matter

Astronomers may have just found one of the strangest objects ever seen—a galaxy made almost entirely of invisible matter. This mysterious system appears to contain very few stars, yet its gravity behaves like a full-sized galaxy. Scientists believe it could be a rare “dark galaxy,” held together mostly by dark matter. If confirmed, it would be one of the clearest signs yet that entire galaxies can exist almost completely hidden from view. Watch now to uncover how something nearly invisible can still shape the universe.

Credit:
Unpacking in the Cleanroom: By James Webb Space Telescope (JWST) / YouTube, https://commons.wikimedia.org/wiki/File:The_Webb_Telescope_Journey_to_Space_Part_4-_Unpacking_in_the_Cleanroom.webm
First Star 18 Times B-roll: By NASA's Scientific Visualization Studio - ADNET Systems, Inc./Aaron E. Lepsch, KBR Wyle Services, LLC/Michael McClare, Advocates in Manpower Management, Inc./Sophia Roberts, Advocates in Manpower Management, Inc./Michael P. Menzel - https://svs.gsfc.nasa.gov/14248, https://commons.wikimedia.org/wiki/File:The_James_Webb_Space_Telescope_First_Star_18_Ti[…]l_(SVS14248_-_Webb_Sees_First_Star_18_Times_B-roll_1).webm
Spectroscopy, Explained: By NASA's Scientific Visualization Studio - Advocates in Manpower Management, Inc./Sophia Roberts, ADNET Systems, Inc./Aaron E. Lepsch, Advocates in Manpower Management, Inc./Rob Andreoli, Advocates in Manpower Management, Inc./John D. Philyaw, University of Maryland College Park/Jeanette Kazmierczak - https://svs.gsfc.nasa.gov/12956, https://commons.wikimedia.org/wiki/File:Spectroscopy,_Explained_(SVS12956).webm
Webb Telescope Upres B-roll Clips: By NASA's Scientific Visualization Studio - KBR Wyle Services, LLC/Michael McClare, ADNET Systems, Inc./Aaron E. Lepsch - https://svs.gsfc.nasa.gov/14393, https://commons.wikimedia.org/wiki/File:Webb_Telescope_Upres_B-roll_Clips_(SVS14393_-_STOCC4).webm
CC BY-SA 4.0 https://creativecommons.org/licenses/by-sa/4.0:
Pleiades cluster tõrva: By Taavi Niittee, https://commons.wikimedia.org/w/index.php?curid=126759353
CC BY 4.0 https://creativecommons.org/licenses/by/4.0:
CDG-2 Image: By Image: NASA, ESA, Dayi Li (UToronto); Image Processing: Joseph DePasquale (STScI) - https://science.nasa.gov/asset/hubble/dark-galaxy-cdg-2-near-perseus-cluster/, https://commons.wikimedia.org/w/index.php?curid=184622198
Subaru Telescope: By International Gemini Observatory/NOIRLab/NSF/AURA - Subaru Telescope, https://commons.wikimedia.org/w/index.php?curid=134392695
Hubblecast 80: By ESA/Hubble - http://spacetelescope.org/videos/heic1425a/, https://commons.wikimedia.org/wiki/File:Hubblecast_80.webm
Motion of "S2": By ESO - http://www.eso.org/public/videos/eso0226a/, https://commons.wikimedia.org/wiki/File:Motion_of_%22S2%22_and_other_stars_around_the_central_Black_Hole.ogv
CC BY-SA 3.0 IGO https://creativecommons.org/licenses/by-sa/3.0/igo/:
Euclid satellite:By ESA - European Space Agency - https://www.esa.int/ESA_Multimedia/Videos/2023/06/A_closer_look_at_the_Euclid_satellite, https://commons.wikimedia.org/wiki/File:A_closer_look_at_the_Euclid_satellite_ESA479307.webm
Perseus cluster of galaxies: By ESA/Euclid/Euclid Consortium/NASA, image processing by J.-C. Cuillandre (CEA Paris-Saclay), G. Anselmi - https://www.esa.int/ESA_Multimedia/Videos/2023/11/Euclid_s_first_images_Perseus_cluster_of_galaxies, https://commons.wikimedia.org/wiki/File:Euclid%27s_first_images-_Perseus_cluster_of_galaxies_ESA484302.webm
Euclid on its way to L2: By ESA - European Space Agency - https://www.esa.int/ESA_Multimedia/Videos/2023/06/Euclid_on_its_way_to_L2, https://commons.wikimedia.org/wiki/File:Euclid_on_its_way_to_L2_ESA479306.webm
Animation is created by Bright Side.