Space · Topic 79 of 119
Dark Matter
⭐ MasteredDark matter is an invisible substance that does not emit light but has gravity. Scientists think it makes up most of the mass in galaxies, even though no one has seen it directly.
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Scientists estimate that dark matter makes up about 27 percent of the universe.
All about Dark Matter
Dark matter is an invisible substance that does not give out light but has gravity. Scientists think it makes up most of the mass in galaxies, even though nobody has seen it directly. Its gravity can be detected by how it affects the movement of stars and gas.
Scientists estimate that dark matter makes up about 27 percent of the universe. Ordinary matter, the stuff that makes up stars, planets and people, is only a small part of the total.
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