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Trove of far-flung galaxy clusters offers clues to dark matter and dark energy.

A single galaxy cluster—hundreds, even thousands, of galaxies held together by gravity—can be as massive as a quadrillion suns, yet faraway clusters are so faint that they are practically invisible to all but the biggest Earth-bound telescopes. Distant clusters hold pieces of the story of how the web-like structure of the universe first emerged and could help illuminate the true nature of dark energy and dark matter.

Associate Professor of Astronomy, Elizabeth Blanton and her team’s search for these galaxy clusters is delivering its biggest return yet: a catalog of about 200 candidate clusters that, if confirmed, may include some of the most distant clusters ever found.

Read the full article, Galactic Mysteries in arts&sciences magazine.