Galactic Noise

background noise from galactic sources

Taken from Dictionary of Science

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A diffuse radio signal that comes from the synchrotron radiation of electrons spiraling in the Galaxy's magnetic field. Also known as galactic radiation or galactic radio waves.

The Internet ENCYCLOPEDIA OF SCIENCE

Background

'interference' which affects the reading of a signal that is being measured. The interference signals come from sources such as natural RADIOACTIVITY and COSMIC RAYS and must be allowed for when measurements are being taken.

Taken from Dictionary of Science