What Are Black Holes? | NASA
https://www.nasa.gov/vision/universe/starsgalaxies/black_hole_description.html
Sep 08, 2020 · NASA’s Hubble, Chandra, Swift, NuSTAR, and NICER space telescopes, as well as other missions, continue to take the measure of black holes and their environments so we can learn more about these enigmatic objects and their role in the evolution of galaxies and the universe at large.. See our Black Hole Gallery for additional images, simulations and …
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