Negative Optical Photograph Of Alpha Centauri Photograph by Noao/science Photo Library

Negative Optical Photograph Of Alpha Centauri

by Noao/science Photo Library

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Title

Negative Optical Photograph Of Alpha Centauri

Artist

Noao/science Photo Library

Medium

Photograph - Photograph

Description

Negative optical photo of Alpha Centauri, the third brightest star in the sky. Alpha Centauri is in fact a double star; the presence of two stars (A & B) is just discernable here from the double diffraction spikes which surround the image. The pair, along with a faint companion known as Proxima Centauri, form the nearest known star system to our own, at a distance of only 4.3 light years. Alpha Centauri A & B, are about 20 arc seconds apart & orbit each other every 80 years. Proxima Centauri lies over two degrees away, out of the frame of this photograph.

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September 13th, 2018

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