astronomska jedinica

astronomska jedinica

The mean Earth-Sun distance, equal to 149. 5 million kilometers or 93 million miles.

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
类别行星科学
Company: PSRD
产品：
取首字母的缩写词：

添加至 My Glossary

其他语言：

类似词条

astronomska jedinica (AJ)

航空航天; 太空飞行

Based on the mean Earth-to-sun distance, 149,597,870 km. Refer to "Units of Measure" section for complete information.

jedinica

化学; 普通化学

A standard for comparison in measurements. For example, the meter is a standard length which may be compared to any object to describe its length.

Ceres

天文学; 行星科学

The largest of the known asteroids; a dwarf planet. Also called 1 Ceres because it was the first asteroid to be discovered (by Piazzi in 1801).

Jarkovski efekat

天文学; 行星科学

An explanation for the shift in an asteroid's orbit around the Sun due to a thermal thrust caused by the body's uneven heating by sunlight. The illuminated side of an asteroid ...

Viking

天文学; 行星科学

U. S. Mission to Mars, composed of two spacecraft, launched in 1975. Viking 1 and Viking 2 both consisted of an orbiter and a lander. Primary mission objectives were to obtain ...

sublimacija

天文学; 行星科学

Phase transformation from solid to gas.

Misija Stardust

天文学; 行星科学

The fourth in NASA's Discovery program of low-cost spacecraft with highly focused science goals, Stardust was comprised of a spacecraft and capsule that completed a seven-year, ...

Solarna i heliosfericna observatorija

天文学; 行星科学

A project of international collaboration between ESA and NASA to study the Sun from its deep core to the outer corona and the solar wind. SOHO was launched in December, 1995. SOHO ...