астрометрија

астрометрија

The branch of astronomy that deals with measuring the positions of celestial objects, especially stars. Astrometrists measure parallaxes and proper motions, which allow astronomers to determine the distances and velocities of the stars.

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품사: 명사
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분야/도메인: 천문학
카테고리: 일반 천문학
Company: Caltech
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ахроматска леќа

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активна галаксија

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активна оптика

천문학; 일반 천문학

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

единица на забрзување

천문학; 일반 천문학

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

зголемување

천문학; 일반 천문학

1) A process by which a star accumulates matter as it moves through a dense cloud of interstellar gas; or, more generally, whereby matter surrounding a star flows toward it (as in ...