Define antimatter, dark matter.
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⭐Antimatter is defined as a material composed of the antiparticles of the corresponding particles of ordinary matter. ... For example, a positron and an antiproton can form an antihydrogen atom.
⭐Dark matter is a hypothetical form of matter that is thought to account for approximately 85% of the matter in the universe, and about a quarter of its total energy density. ... Because dark matter has not yet been observed directly, it must barely interact with ordinary baryonic matter and radiation.
⭐Dark matter is a hypothetical form of matter that is thought to account for approximately 85% of the matter in the universe, and about a quarter of its total energy density. ... Because dark matter has not yet been observed directly, it must barely interact with ordinary baryonic matter and radiation.
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