Astronomy. Matter which can be inferred to exist from its gravitational effects but is not observable by visible light. In later use chiefly: spec.…
| 单词 | θ1246 |
| 释义 | the world > the universe > diffused matter > [noun] > dark matter (3) dark matter1893 Astronomy. Matter which can be inferred to exist from its gravitational effects but is not observable by visible light. In later use chiefly: spec.… Subcategories:— types of (2) |
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