If you mean the light we see NOW, it left the star about 4.4 years ago, since that is the distance of the star, expressed in light-years.
Alpha Centauri is a triple star system. Alpha Centauri A, B & C or Proxima Centauri. Alpha Centauri A & B are 4.37 light years from the Earth whereas Alpha Centauri C is 4.243 light years.
The distance to Alpha Centauri is about 4.3 light-years.
Alpha Centauri is the closest star system to Earth, located about 4.37 light-years away in the constellation of Centaurus. It consists of three stars: Alpha Centauri A, Alpha Centauri B, and Proxima Centauri. Proxima Centauri is the closest known star to the Sun.
The star that is approximately 4.3 light years away from Earth is Proxima Centauri. It is part of the Alpha Centauri star system, which also includes Alpha Centauri A and Alpha Centauri B. Proxima Centauri is a red dwarf star and is the closest known star to the Sun. Its proximity has made it a target for the search for exoplanets and potential extraterrestrial life.
Proxima Centauri Alpha Centauri A Alpha Centauri B
Alpha Centauri is the second-closest, at 4.5 Light Years away. The closest star is Proxima Centauri, which is 4.2 light years distant. However, Alpha Centauri is a star very much like our Sun, while Proxima Centauri is a very dim dwarf star, hardly visible from Earth even though it is closest.
The Alpha Centauri system is about 4.2 light years away. The closest star is actually Proxima Centauri.
That would be "Alpha Centauri". The distance is about 4.4 light-years.
Alpha Centauri is the nearest star system. Its a binary star system of Alpha Centauri A and Alpha Centauri B. If someone asks you what is the nearest star ? then the answer will be "proxima centauri" in my opinion. nearest star: proxima centauri nearest star system: Alpha centauri A and B. Some people believe that its a triple star system of Prixma, Alpha A and Alpha B. centauri.
Our closest star is Proxima Centauri, located about 4.24 light-years away from Earth. It is part of the Alpha Centauri star system, which also includes Alpha Centauri A and Alpha Centauri B. Proxima Centauri is a red dwarf star and is known to have at least one confirmed exoplanet, Proxima Centauri b, within its habitable zone.
The third closest star will be either Alpha Centauri A or Alpha Centauri B depending on the time of observation.
Polaris (the North star - Alpha Ursae Minoris) is a triple star system, but appears to us as a single star. Alpha Centauri is also another triple star system. And there are many more.