General astronomy

General astronomy

Contributors in General astronomy

General astronomy

1) Unit of electric current. "The ampere is that constant current which, if maintained in two straight parallel conductors of infinite length, of negligible circular cross-section, and placed 1 meter ...

angstrom

Astronomy; General astronomy

A unit of length used when expressing wavelengths.

angular momentum (L)

Astronomy; General astronomy

1) The angular momentum of a system about a specified origin is the sum over all the particles in the system (or an integral over the different elements of the system if it is continuous) of the ...

angular size

Astronomy; General astronomy

The angle subtended by an object on the sky. For example, the angular size of the moon is 30 arcminutes.

anisotropy

Astronomy; General astronomy

The condition in which the universe appears different in different directions.

annular eclipse

Astronomy; General astronomy

1) A solar eclipse in which the solar disk is never completely covered but is seen as an annulus or ring at maximum eclipse. An annular eclipse occurs when the apparent disk of the Moon is smaller ...