britannica.com
britannica.com
en.wikipedia.org
spaceplace.nasa.gov
NASA Space Place
https://spaceplace.nasa.gov › dark-matter › en
home.cern
science.nasa.gov
Science Mission Directorate
https://science.nasa.gov › universe › dark-matter-101-looking-for-the-missing-mass
sciencenotes.org
Science Notes and Projects
https://sciencenotes.org › what-is-dark-matter
livescience.com
Live Science
https://www.livescience.com › dark-matter.html
energy.gov
Department of Energy
https://www.energy.gov › science › doe-explainsdark-matter
nature.com
sciencefocus.com
BBC Science Focus Magazine
https://www.sciencefocus.com › space › what-is-dark-matter
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