Apolo

Successful US lunar exploration program in which the Apollo spacecraft 1 to 6 were unmanned; 7 to 10 were manned but did not land; and 11, 12 and 14 to 17 landed and returned ...

aktinoidi

天文学; 普通天文学

Elementi sa atomskim brojevima od 89 (Aktinij) i 103

aktinijum

天文学; 普通天文学

Mekan, srebrno-beli radioaktivni metal koji sija u mraku

akivna optika

天文学; 普通天文学

Controlling the shape of a telescope mirror at a relatively slow rate.

adaptivna optika

天文学; 普通天文学

Compensating for atmospheric distortions in a wavefront by high-speed changes in the shape of a small, thin mirror.

americijum

天文学; 普通天文学

radioactive silvery metal which does not occur naturally

jedinica ubrzanja

天文学; 普通天文学

A unit for measuring acceleration, which is metre per second squared.

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行业/领域：地理学类别国家及地区

Sveta gora

Greek mountain and pilgrimage site, known as the birthplace of early Christian Orthodox monasticism, housing around 20 Eastern Orthodox monasteries. ...