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
Examples of dark energy in a Sentence
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The space telescope's primary science goals include studying dark energy, mapping dark matter and discovering thousands of exoplanets via gravitational microlensing, in which a massive foreground object bends the light of a background star, temporarily magnifying it like a lens.
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Samantha Mathewson, Space.com, 1 Jan. 2026
In April 2024, a map of the cosmos released by the Dark Energy Spectroscopic Instrument (DESI) hinted that dark energy, the repulsive agent that’s driving the expansion of space, has been weakening over time.
—Quanta Magazine, 17 Dec. 2025
The most abundant ingredients in the universe are dark matter and dark energy, both of which are poorly understood.
—Chris Impey, The Conversation, 4 Dec. 2025
This study is the first to map intrinsic alignment in universes where dark matter and dark energy interact, giving future telescopes important tools to avoid such errors.
—Rupendra Brahambhatt, Interesting Engineering, 29 Nov. 2025
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Samantha Mathewson, Space.com, 1 Jan. 2026
In April 2024, a map of the cosmos released by the Dark Energy Spectroscopic Instrument (DESI) hinted that dark energy, the repulsive agent that’s driving the expansion of space, has been weakening over time.
—Quanta Magazine, 17 Dec. 2025
The most abundant ingredients in the universe are dark matter and dark energy, both of which are poorly understood.
—Chris Impey, The Conversation, 4 Dec. 2025
This study is the first to map intrinsic alignment in universes where dark matter and dark energy interact, giving future telescopes important tools to avoid such errors.
—Rupendra Brahambhatt, Interesting Engineering, 29 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 7 Jan. 2026.
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