General astronomy

General astronomy

Contributors in General astronomy

General astronomy

Aberration of starlight: The apparent displacement of a star from its real position on the celestial sphere caused by the motion of the Earth in its orbit around the Sun. Aberration was discovered, ...

absolute cavity radiometer

Astronomy; General astronomy

An instrument used for very accurate measurements of solar irradiance which absorbs radiation on a blackened conical receiver and are electrically self-calibrating. Absolute cavity radiometers ...

absolute magnitude

Astronomy; General astronomy

The apparent magnitude that a star would possess if it were placed (normalized) at a distance of 10 parsecs from the Earth. With the method, absolute magnitude provides a direct comparison of the ...

coronal mass ejection (CME)

Astronomy; General astronomy

An observed change in the Sun’s coronal structure that occurs on a time scale between a few minutes to several hours, and involves the appearance of a new discrete, bright, white light feature in the ...

absorption nebula

Astronomy; General astronomy

A region in space that is made of dust and gas which has no stars to illuminate it from within. As such, these objects are completely dark and obscure any light from stars or emission nebulae which ...

Cambridge Electron Accelerator (CEA)

Astronomy; General astronomy

The Cambridge Electron Accelerator was constructed and operated jointly by Harvard University and the Massachusetts Institute of Technology and supported by the Atomic Energy Commission . It existed ...

cosmic background radiation

Astronomy; General astronomy

The remnant weak electromagnetic radiation released during the decoupling of matter and energy, several hundred thousand years after the big bang. The peak wavelength of the emission is in the ...