General astronomy

General astronomy

Contributors in General astronomy

General astronomy

The change in direction of travel (bending) of a light ray as it passes obliquely through the atmosphere. As a result of refraction, the observed altitude of a celestial object is greater than its ...

astronomical unit (AU)

Astronomy; General astronomy

1) Mean distance between the Earth and the Sun: 1.495985 × 1011 m. 2) The AU is the preferred unit for distances within the solar system. Mercury, the innermost planet, lies on average 0.39 AU from ...

astronomy

Astronomy; General astronomy

The science that studies the natural world beyond the earth.

astrophysics

Astronomy; General astronomy

The science that studies the physics and chemistry of extraterrestrial objects. The alliance of physics and astronomy, which began with the advent of spectroscopy, made it possible to investigate ...

asymptotic branch star

Astronomy; General astronomy

Globular cluster stars, which are found in that part of the HR diagram that connects the top pf the giant tip with the horizontal branch stars.

atmophile element

Astronomy; General astronomy

volatile element that tends to be found in the atmosphere of a planet or asteroid

atmosphere

Astronomy; General astronomy

Mantle of gases round a star planet or moon, sometimes even forming the apparent surface of the body. For a body to retain an atmosphere depends on the body's gravity, and the temperature and ...