General astronomy

General astronomy

Industry: Astronomy

Add a new term

Contributors in General astronomy

Become a Contributors

General astronomy

alpha2 CVn

Astronomy; General astronomy

A spectrum variable with spectrum showing strong, profuse lines of rare earths, iron-peak elements, and Si.

alpha Persei cluster

Astronomy; General astronomy

A young open cluster with a high mean rotational velocity.

40 Eridani

Astronomy; General astronomy

A nearby triple system, 5 pc distant. Component A is K0 V; component B is a DA white dwarf; component C is M5e V.

47 Tucanae

Astronomy; General astronomy

A metal-rich globular cluster. It has roughly one-quarter the solar metal abundance. It has a high galactic latitude and low reddening. It is a member of the thick-disk population.

Altair

Astronomy; General astronomy

(alpha Aql, HR 7557) A bright A7 V star.

besselian year

Astronomy; General astronomy

A quantity introduced by F. W. Bessel in the nineteenth century that has been used into the twentieth century. Bessel introduced a system whereby it would be convenient to identify any instant of ...

astronomical unit (AU)

Astronomy; General astronomy

Approximately equal to the mean earth-sun distance, which is about 150,000,000 km or 93,000,000 miles. Formally, the AU is actually slightly less than the earth's mean distance from the sun ...