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Birthday · December 4, 2005

Proxima Centauri: The Closest Star

December 4, 2005

When you were born, the Sun rose on a world that had never seen you before. Since then, every dawn has arrived in a universe subtly altered...

Proxima Centauri: The Closest Star

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APOD published December 4, 2005. Credit: David Malin. A publication-date match, not a photo taken on your date. Independent of NASA.

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Proxima Centauri: The Closest Star

Original APOD · December 4, 2005

What is the closest star to our Sun? It is Proxima Centauri, the nearest member of the Alpha Centauri triple star system. Light takes only 4.22 years to reach us from Proxima Centauri. This small red star, captured in the center of the above image, is so faint that it was only discovered in 1915 and is only visible through a telescope. Stars of all types from our Milky Way Galaxy are visible in the background. The brightest star in the Alpha Centauri system is quite similar to our Sun, has been known as long as recorded history, and is the third brightest star in the night sky. The Alpha Centauri system is primarily visible from Earth's Southern Hemisphere.

Image credit: David Malin

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