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Did You Know: Dark Matter

Did you know that dark matter does not cast shadows?


Produced by the Space Telescope Science Institute, Office of Public Outreach, in collaboration with NASA’s Universe of Learning partners: IPAC, Jet Propulsion Laboratory, Smithsonian Astrophysical Observatory, and Sonoma State University. 


  • Hubble Space Telescope map of dark matter in in galaxy cluster Cl 0024+17, 5 billion light-years away: NASA, ESA, M.J. Jee and H. Ford (Johns Hopkins University)

  • Hubble Space Telescope image of galaxy cluster Cl 0024+17: NASA, ESA, M.J. Jee and H. Ford (Johns Hopkins University)

Written by Margaret W. Carruthers, 
Designed by Dani Player
Additional editorial input from Timothy Rhue II and Dr. Brandon Lawton
Music courtesy of Associated Production Music LLC


All narration is presented in text form within the video. In addition, a full transcript will be available in the Library in the near future. Check back soon!