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Alpha Centauri: Closest Star To Earth 5nvklj





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Alpha Centauri: Closest Star To Earth

Dragon
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Alpha Centauri: Closest Star To Earth Empty Alpha Centauri: Closest Star To Earth

Post by Dragon Sat Nov 06, 2021 12:35 am

he closest star to Earth is a triple-star system called Alpha Centauri.

The two main stars are Alpha Centauri A and Alpha Centauri B, which form a binary pair.

They are about 4.35 light-years from Earth, according to NASA.

The third star is called Proxima Centauri or Alpha Centauri C, and it is about 4.25 light-years from Earth, making it the closest star other than the sun.

According to NASA, Alpha Centauri A and B are on average about 23 astronomical units (AU) from each other — a little more than the distance between the sun and Uranus.

(An astronomical unit is the average distance between Earth and the sun, which equals 92,955,807 miles or 149,597,870 kilometers.)

The closest the two stars ever come to each other is 11 astronomical units, according to NASA, and the two stars orbit a common center of gravity every 80 years.


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Post by Dragon Sat Nov 06, 2021 12:37 am

Alpha Centauri: Closest Star To Earth 2bjcHRtQb2iAhM6aLwUgwZ-1024-80.jpg
(Image credit: ESA/NASA)

A Hubble Space Telescope image of Alpha Centauri A (left) and Alpha Centauri B (right).


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Alpha Centauri: Closest Star To Earth 334pu7m
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Post by Dragon Sat Nov 06, 2021 12:38 am

Alpha Centauri: Closest Star To Earth 4PZhycVEtT7guFYaG9aEg4-970-80
(Image credit: ESO/M. Kornmesser)

An artist's depiction of the view from the surface of Proxima b, with the two stars of Alpha Centauri visible low in the skies.


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Post by Dragon Sat Nov 06, 2021 12:38 am



A Tour of Alpha Centauri


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Alpha Centauri: Closest Star To Earth Empty Re: Alpha Centauri: Closest Star To Earth

Post by Dragon Sat Nov 06, 2021 12:39 am



Exoplanet discovered orbiting Alpha Centauri

Astronomers working from the European Southern Observatory in Chile have discovered a planet slightly more massive than Earth, orbiting a star in the Alpha Centauri triple star system -- the nearest stellar system to our planet.


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