General astronomy

General astronomy

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General astronomy

artificial satellite

Astronomy; General astronomy

a satellite made by humans which is gravitationaly bound and in orbit of a larger physical object

ascending node

Astronomy; General astronomy

In the orbit of a solar-system body, the point where the body crosses the ecliptic from south to north: for a star, out of the plane of the sky toward the observer.

AI Velorum star

Astronomy; General astronomy

A class of dwarf Cepheids. They are all RR Lyrae stars with periods shorter than 0.25 days.

Aldebaran (alpha Tau, HR 1457)

Astronomy; General astronomy

A K5 III subgiant (a foreground star in the Hyades). It has a faint M2 V companion. It is now known to be slowly and irregularly variable.

1) An eclipsing system of at least three components (B8 V, K0, Am). Period of components A and B is about 68.8 hours; period of components A, B, and C is about 1.9 years. Long term observations also ...