dark matter
noun
: nonluminous matter not yet directly detected by astronomers that is hypothesized to exist to account for various observed gravitational effects
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The thorium-229 spectra used in the current study had a linewidth of about 20 gigahertz, considered broad compared to the razor-thin signals needed to probe dark matter.
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New Atlas, 16 Sep. 2025
This implied there was a halo of dark matter in which the galaxy was embedded.
—Phil Plait, Scientific American, 11 Sep. 2025
Instead, with this tweak to dark matter, the early protostar that forms will instead remain in a large, relatively cool state for a long time, which can grow the protostar up to 100,000 solar masses or even more.
—Ethan Siegel, Big Think, 2 Sep. 2025
However, if dark matter particles are of smaller masses, this detection method won't work.
—Robert Lea, Space.com, 28 Aug. 2025
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New Atlas, 16 Sep. 2025
This implied there was a halo of dark matter in which the galaxy was embedded.
—Phil Plait, Scientific American, 11 Sep. 2025
Instead, with this tweak to dark matter, the early protostar that forms will instead remain in a large, relatively cool state for a long time, which can grow the protostar up to 100,000 solar masses or even more.
—Ethan Siegel, Big Think, 2 Sep. 2025
However, if dark matter particles are of smaller masses, this detection method won't work.
—Robert Lea, Space.com, 28 Aug. 2025
See All Example Sentences for dark matter
Cite this Entry
“Dark matter.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dark%20matter. Accessed 20 Sep. 2025.
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