General astronomy

General astronomy

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General astronomy

Eddington

Astronomy; General astronomy

British scientist who studied the formation, structure, and movement of stars. He promoted the theory of relativity.

binary stars

Astronomy; General astronomy

A binary star is a star system consisting of two stars orbiting around their common center of mass.

black hole

Astronomy; General astronomy

A black hole is a region of spacetime from which nothing, not even light, can escape.

celestial pole

Astronomy; General astronomy

The north and south celestial poles are the two imaginary points in the sky where the Earth's axis of rotation, indefinitely extended, intersects the imaginary rotating sphere of stars called the ...

celestial equator

Astronomy; General astronomy

A great circle on the imaginary celestial sphere, in the same plane as the Earth's equator. In other words, it is a projection of the terrestrial equator out into space.