dark energy
noun
: a hypothetical form of energy that produces a force that opposes gravity and is thought to be the cause of the accelerating expansion of the universe
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The researchers found that if dark matter and dark energy exchange energy, the shapes, spins, and alignments of dark matter halos—the massive structures that surround galaxies—change in measurable ways.
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Rupendra Brahambhatt, Interesting Engineering, 29 Nov. 2025
Besides studying dark matter and dark energy, one of Roman's core surveys will be the Galactic Bulge Time-Domain Survey, in which millions of stars in the central bulge of the Milky Way galaxy will be studied, principally to look for exoplanets.
—Keith Cooper, Space.com, 24 Nov. 2025
The observatory is conducting a ten-year-long survey of the southern sky, dubbed the Legacy Survey of Space and Time, which has as one of its principal goals improving our understanding of the nature of both dark energy and dark matter.
—Ian Randall, MSNBC Newsweek, 6 Nov. 2025
Roman is designed to answer questions regarding the habitability of exoplanets and the nature of dark energy, which is thought to make up 68% of the universe.
—Jeffrey Kluger, Time, 5 Nov. 2025
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Rupendra Brahambhatt, Interesting Engineering, 29 Nov. 2025
Besides studying dark matter and dark energy, one of Roman's core surveys will be the Galactic Bulge Time-Domain Survey, in which millions of stars in the central bulge of the Milky Way galaxy will be studied, principally to look for exoplanets.
—Keith Cooper, Space.com, 24 Nov. 2025
The observatory is conducting a ten-year-long survey of the southern sky, dubbed the Legacy Survey of Space and Time, which has as one of its principal goals improving our understanding of the nature of both dark energy and dark matter.
—Ian Randall, MSNBC Newsweek, 6 Nov. 2025
Roman is designed to answer questions regarding the habitability of exoplanets and the nature of dark energy, which is thought to make up 68% of the universe.
—Jeffrey Kluger, Time, 5 Nov. 2025
See All Example Sentences for dark energy
Cite this Entry
“Dark energy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dark%20energy. Accessed 4 Dec. 2025.
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