Alpha Centauri is the closest star to Earth (after the Sun), with its light taking just over 4 years to reach us (4.37 light years from the Sun).
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Alpha Centauri is the third brightest star in our night sky and can be found in the Centaurus constellation. Alpha Centauri is a binary star system composed of two stars – Alpha Centauri A and Alpha Centauri B. A third star, Alpha Centauri C or Proxima Centauri is a much fainter red dwarf star also in the mix.
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