General astronomy

General astronomy

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General astronomy

circumstellar dust

Astronomy; General astronomy

Astronomical dust around a star, it can be in the form of a spherical shell or a disk.

color index

Astronomy; General astronomy

A simple numerical expression that determines the color of an object, which in the case of a star gives its temperature; the difference between the magnitude of the stars.

circumpolar region

Astronomy; General astronomy

Located or found throughout a polar region. A star that, as viewed from a given latitude on Earth, never sets (that is, never disappears below the horizon), due to its proximity to one of the ...

configuration

Astronomy; General astronomy

Particular positions of the planets relative to the Earth and Sun on the celestial sphere.

conjunction

Astronomy; General astronomy

Two celestial bodies appear near one another in the sky that have the same longitude from some place (usually the Earth).

chromosphere

Astronomy; General astronomy

The second of the three main layers in the Sun's atmosphere, just above the photosphere, and is roughly 2 000-kilometers deep. It can only be seen during a total eclipse. Its temperature is about ...

Upper Atmosphere Research Satellite

Astronomy; General astronomy

The UARS is a NASA owned satellite that will be re-entering the earth's atmosphere on the evening of Friday 23rd September. The satellite will break up and fall over an area of 300 square miles, ...