apocentar

A telescope that uses as its primary optical element a lens. Binoculars are a type of refractor. In general, refractors are much more expensive to build and buy than are ...

рефлектор

天文学; 普通天文学

A telescope that uses as its primary optical element a mirror. Nearly all large telescopes in use today by amateur and professional astronomers are reflecting telescopes.

фотометрија

天文学; 普通天文学

In astronomy, the measurement of the light emitting from astronomical objects, generally in the visible or infrared bands, in which a specific or general wavelength band is ...

паралакса

天文学; 普通天文学

The apparent displacement or the difference in apparent direction of an object as seen from two different points not on a straight line with the object (as from two different ...

орбита

天文学; 普通天文学

The path of one object about another (used here for an object orbiting the sun).

新闻词条

精选词条

Tijana Biberdzic

0
词条
0
词汇
1
关注者

行业/领域：历史类别世界历史

Новгород

Водећи град Русије и комерцијални центар који је био у процвату током средњег века, постао је главни уред Ханза. На врхунцу своје моћи под Александром ...