Exoplanete Alpha Centauri Bb - Artist's impression of the planet orbiting Alpha Centauri B: Artist's...

Exoplanete Alpha Centauri Bb - Artist's impression of the planet orbiting Alpha Centauri B: Artist's view of the planet Alpha Centauri Bb, also known as Gliese 559 Bb. Discovered in 2012 its existence is questioned. It would be orbiting the dwarf star Alpha Centauri B at a distance of 4.37 light years in the constellation Centauri. The planet is not in the habitable zone of the star, as it orbits far too close to the star. Alpha Centauri Bb was a proposed exoplanet orbiting the K-type main-sequence star Alpha Centauri B, located 4.37 light-years from Earth in the southern constellation of Centaurus. Its existence was announced in October 2012 but in October 2015, a scientific paper disproved the existence of the planet. Alpha Centauri B dominates the sky. Just above it to the right is a very bright star: Alpha Centauri A. And above that to the right is another star: our sun