zimski solsticij, kratkonevnica

zimski solsticij, kratkonevnica

The position on the ecliptic occupied by the sun about december 22 when it reaches its greatest southerly declination.

0 0

完善词条

添加图像

词性：名词
同义词：
词汇：
行业/领域：天文学
类别火星
Company: NASA
产品：
取首字母的缩写词：

添加至 My Glossary

其他语言：

类似词条

Mars

天文学; 火星

Mars is the fourth planet from the Sun. Mars' diameter is 6,790 km and takes 687 days to orbit the Sun. Mars is named after the Roman god of war. In Eastern Asian cultures Mars is ...

Phobos

天文学; 火星

The larger and innermost of the planet Mars' two moons. Phobos was discovered by Asaph Hall on August 17, 1877. In Greek mythology, Phobos was the son of Ares (Mars) and Aphrodite ...

Deimos

天文学; 火星

The smaller and outermost of the planet Mars' two moons. Deimos was discovered by Asaph Hall on August 11, 1877. In Greek mythology, Deimos was the son of Ares (Mars) and ...

ultrajubicasto zracenje

天文学; 火星

The invisible electromagnetic radiation beyond the violet end of the spectrum of visible light, of wavelengths ranging, roughly, from 4000 down to 400 angstroms.

prolecna ravnodnvevnica

天文学; 火星

The position on the celestial sphere occupied by the sun on or about march 21 when its path on the ecliptic crosses the celestial equator going from south to north. This point is ...

x-zraci

天文学; 火星

Very short wavelength radiations beyond the ultraviolet in the spectrum, which are about one ten-thousandth as long as the visible violet and are extremely penetrating.