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Motion of the Star Proxima of Centauri - The proper motion of Proxima Centauri -...

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PIX4571842
Image title
Motion of the Star Proxima of Centauri - The proper motion of Proxima Centauri - Proxima of Centauri (in the center of the image) is the closest star to the Sun, located at a distance of 4.2 years - light. This star is a red dwarf, 10,000 times less luminous than our Sun, and is invisible to the naked eye. Its proximity makes it move quickly ahead of the other stars. This composite image made from three images taken in 1976 (blue), 1982 (red) and 1993 (green) shows the shift of the star in 17 years. Image obtained from the 1.2m Schmidt UK telescope of Siding Spring. Proxima Centauri is the nearest known star to the sun, at a distance of about 4.2 light years. It is an intrinsically faint red star, more than ten magnitudes (ten thousand times) fainter than the Sun. It is also much cooler, with a surface temperature of about 3100 C. Its visual (apparent) magnitude is eleven, so it is only visible with a good telescope, and only then from southern latitudes. Proxima is about one - tenth the mass of the sun, which accounts for its low surface temperature. It is possibly an outlying member of the triple alpha Centauri system just a few light days closer to us than the other, much brighter stars in the group. Because it is so close Proxima has a large 'proper motion', moving against the multitudes of background stars by 3.85 arc seconds a year, enough to carry it the width of the full Moon in about 500 years. The monochrome plates from which this 3 - colour picture were made were taken in 1976 (blue), 1982 (red) and 1993 (green) showing its movement over 17 years. The faint reddish halo around the star is an artifact of the infrared plate
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Motion of the Star Proxima of Centauri - The proper motion of Proxima Centauri - Proxima of Centauri (in the center of the image) is the closest star to the Sun, located at a distance of 4.2 years - light. This star is a red dwarf, 10,000 times less luminous than our Sun, and is invisible to the naked eye. Its proximity makes it move quickly ahead of the other stars. This composite image made from three images taken in 1976 (blue), 1982 (red) and 1993 (green) shows the shift of the star in 17 years. Image obtained from the 1.2m Schmidt UK telescope of Siding Spring. Proxima Centauri is the nearest known star to the sun, at a distance of about 4.2 light years. It is an intrinsically faint red star, more than ten magnitudes (ten thousand times) fainter than the Sun. It is also much cooler, with a surface temperature of about 3100 C. Its visual (apparent) magnitude is eleven, so it is only visible with a good telescope, and only then from southern latitudes. Proxima is about one - tenth the mass of the sun, which accounts for its low surface temperature. It is possibly an outlying member of the triple alpha Centauri system just a few light days closer to us than the other, much brighter stars in the group. Because it is so close Proxima has a large 'proper motion', moving against the multitudes of background stars by 3.85 arc seconds a year, enough to carry it the width of the full Moon in about 500 years. The monochrome plates from which this 3 - colour picture were made were taken in 1976 (blue), 1982 (red) and 1993 (green) showing its movement over 17 years. The faint reddish halo around the star is an artifact of the infrared plate

Photo credit
Photo © Anglo-Australian Observatory/David Malin Images/Novapix / Bridgeman Images
Image keywords
astronomy / movement / star / centaur / astronomy / centaurus / star / Novapix / astronomy / South Hemisphere / southern hemisphere / Star M / red dwarf / M Star / red dwarf / movement / Proxima Centauri / Proxima Of Centaur / Eruptive Star / Flare Star

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