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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Researchers also discovered that dark energy had not always been dominant, appearing to begin its rule and start speeding up the expansion of the universe around 5 billion years ago, or roughly 9 billion years after the Big Bang.
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Robert Lea, Space.com, 6 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
Over the course of two generations, then, from the Boomers through Gen Xers, groupthink had come to signify a dark energy that seemed to exert its power at the worst possible times.
—David Merritt Johns, The Atlantic, 2 Nov. 2025
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Robert Lea, Space.com, 6 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
Over the course of two generations, then, from the Boomers through Gen Xers, groupthink had come to signify a dark energy that seemed to exert its power at the worst possible times.
—David Merritt Johns, The Atlantic, 2 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 14 Nov. 2025.
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