Astronomy. The line of separation between the illuminated and unilluminated parts of the moon, Earth, or another celestial object.
| 单词 | θ729 |
| 释义 | the world > the universe > planet > [noun] > part of planet (23) terminator1661 Astronomy. The line of separation between the illuminated and unilluminated parts of the moon, Earth, or another celestial object. belt1665 Astronomy. Any of the broad latitudinal stripes visible across the surface of Jupiter or other planets of the gas giant type; esp. one of the… fascia1704 Any object, or collection of objects, that gives the appearance of a band or stripe. Astronomy. The belt of a planet. fibre1715 In Kepler's system of celestial physics: see quot. Obsolete. white spot1784 Astronomy. A distinct white area observed by telescope on the surface of a planet; (in later use) spec. such an area occurring periodically on Saturn… dayside1827 The side of a planet that is facing the sun and is therefore in daylight, esp. in phrase on the dayside. Cf. nightside, n. 1. nightside1848 Astronomy. The side of a planet, etc., that is facing away from the sun and is therefore in darkness. albedo1860 Astronomy. The proportion of incident solar light that is diffusely reflected by the surface or surface material of a planet or other celestial… north pole1861 An analogous point on a spherical or spheroidal body, esp. another planet or a moon. polar cap1863 A large region of ice or other frozen matter surrounding one or other of a planet's poles. core1882 Geology and Astronomy. The differentiated central part of a planet; spec. that of the earth, differing from the mantle and the crust in… regolith1897 Geology. The unconsolidated weathered material covering the solid bedrock of the earth, comprising rock fragments, mineral grains, and other… tectonics1899 Geology. The structural arrangement of rocks in the earth's crust (or on another planet); the branch of geology concerned with the understanding… sediment ring1955 a ring of rock masses orbiting a planet, regarded as debris from the time of its formation. radiation belt1958 a region of intense radiation surrounding a planet, esp. one where charged particles accumulate under the influence of the planet's magnetic… palaeo-radius1960 the radius of the earth or another planet at some time in the past. space needle1961 (a) each of a large number of short copper fibres placed experimentally in earth orbit to reflect communication signals (now rare); (b) a very tall… soil1967 Friable or powdery material occurring naturally on another planet. Subcategories:— material that falls or has fallen onto planet (2) — polar flattening (2) — polar wandering (1) |
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