dark energy
nounDefinition of dark energy
: 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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Calculating this mass can help researchers who are studying dark matter, dark energy and the structure of the universe. — Ashley Strickland, CNN, "Scientists share new details about mysterious 'ghost particle'," 22 Aug. 2019 Already, with their first-year data, the experimenters have incrementally improved the measurement of a key quantity that will reveal what dark energy is. — Quanta Magazine, "Scientists Unveil New Inventory of Universe’s Dark Contents," 3 Aug. 2017 The remaining 68 percent of all the matter and energy in the universe is dark energy (which is accelerating the expansion of the universe). — Brian Resnick, Vox, "Scientists weighed all the mass in the Milky Way galaxy. It’s mind-boggling.," 27 June 2019 While dark matter keeps individual galaxies together, dark energy propels all the galaxies in the universe apart from one another. — Brian Resnick, Vox, "Scientists weighed all the mass in the Milky Way galaxy. It’s mind-boggling.," 27 June 2019 Surveying them should shed light on the evolution of the universe and the nature of the dark energy that is accelerating its expansion. — Daniel Clery, Science | AAAS, "Telescope designed to study mysterious dark energy keeps Russia’s space science hopes alive," 10 June 2019 Adam Riess at the Space Telescope Science Institute, who shared the 2011 Nobel Prize in physics for the discovery of dark energy, is alternately amazed and amused by the latest turn of events. — Corey S. Powell, Discover Magazine, "Why We Still Don't Know How Fast the Universe is Expanding," 1 Jan. 2019 Physicists estimate some 27 percent of the total universe is dark matter and the rest (68 percent) is a similarly shadowy phenomenon called dark energy. — Joe Lindsey, Popular Mechanics, "Filling the Void: What Is Dark Matter?," 28 May 2019 More recently, the spirit of aether has even come back into the discussion of the cosmos, thanks to the mysterious discoveries of dark matter and dark energy, the elusive force believed to be the cause of the accelerating expansion of the universe. — Meg Neal, Popular Mechanics, "The Eternal Quest for Aether, the Cosmic Stuff That Never Was," 19 Oct. 2018These example sentences are selected automatically from various online news sources to reflect current usage of the word 'dark energy.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
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