“solar parallax”的概念、定义、翻译、参考文献-科学参考

solar parallax

Physics

The angle subtended by the earth’s equatorial radius at the centre of the sun at the mean distance between the earth and the sun (i.e. at 1 astronomical unit). It has the value 8.794 148 arc seconds.

Astronomy

The angular width of the Earth’s equatorial radius as seen from the centre of the Sun, when the Earth is at a distance of 1 au. Its value is 8″.794143. Historically, the solar parallax was the prime quantity giving the linear scale of the Solar System, and was derived from observations of bodies in the Solar System as seen from widely spaced observatories, for example of transits of Mercury or Venus across the Sun. The solar parallax is now derived from direct measurements of distances in the Solar System by radar and transmissions from spacecraft.

单词	solar parallax
释义	solar parallax Physics The angle subtended by the earth’s equatorial radius at the centre of the sun at the mean distance between the earth and the sun (i.e. at 1 astronomical unit). It has the value 8.794 148 arc seconds. Astronomy The angular width of the Earth’s equatorial radius as seen from the centre of the Sun, when the Earth is at a distance of 1 au. Its value is 8″.794143. Historically, the solar parallax was the prime quantity giving the linear scale of the Solar System, and was derived from observations of bodies in the Solar System as seen from widely spaced observatories, for example of transits of Mercury or Venus across the Sun. The solar parallax is now derived from direct measurements of distances in the Solar System by radar and transmissions from spacecraft.
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