Proksima Centaura b ili Proxima Centauri b (ponekad jednostavnije Proxima b) je ekstrasolarni planet koji ima putanju oko crvenog patuljka Proksima Centaura, najbliže zvijezde našem Suncu.Udaljen je oko 4,2 svjetlosne godine (1,3 parsek) od Zemlje u zviježđu Centaur.To je najbliži poznati ekstrasolarni planet, ali je mala mogućnost da je naseljen sa živim svijetom. That leads to the question: "Is there an atmosphere that protects the planet … Proxima b was first detected four years ago, when scientists measured a low disturbance in the star’s speed, suggesting the presence of a companion cosmic body. An artist's conception of Proxima Centauri b as a rocky-like exoplanet, with Proxima Centauri and the Alpha Centauri binary system in the background. Proxima b : une planète pouvant abriter la vie autour de Proxima Centauri. Beyond the planet’s size and distance from its parent star, much about it is still mysterious. Proxima Centauri is a red dwarf, these stars have less than half the mass of our sun. More recently, Stephen Baxter pretty much nailed Proxima Centauri b in his depiction of a just over one Earth-mass planet in the habitable zone called Per Ardua — this was in Baxter’s 2015 novel Proxima. Reportedly, Proxima b sits 4.2 light-years away from the sun and has a mass 1.17 times the mass of the Earth. But there's some bad news: Proxima Centauri tends to bombard any planets in its vicinity with a ferocious amount of X-rays - Proxima b receives about 400 times the amount as Earth receives from its Sun. But there's some bad news: Proxima Centauri tends to bombard any planets in its vicinity with a ferocious amount of X-rays - Proxima b receives about 400 times the amount as Earth receives from its Sun. Proxima Centauri b is at least as massive as Earth — but it could be heavier. Grâce aux télescopes de l'Observatoire Européen Austral et divers autres instruments, les astronomes ont suggéré l'existence d'une planète en orbite autour de Proxima du Centaure, confirmée fin mai 2020 par une équipe internationale de chercheurs dont l’Université de Genève (UNIGE). The star Alpha Centauri C, Proxima Centauri, is the closest star to the Solar System. At 4.2 light years away Proxima Centauri is the nearest star to the sun, but as it is so small and dim it cannot be viewed with the naked eye. Proxima Centauri and Its Two Planets With a distance of 4.2 light-years, Proxima Centauri is the closest star to Earth after the Sun. Proxima Centauri b (također poznata i kao Proxima b) je egzoplanet u orbiti unutar zone pogodne za život crvenog patuljka Proxima Centauri, zvijezde najbliže Suncu.Smještena je oko 4,2 svjetlosnih godina (1,3 parseka, 40 triliona km) od Zemlje u sazvježdu Kentaur.Predstavlja egzoplanet koji je najbliži Sunčevom sistemu i najbliži poznati egzoplanet koji bi mogao biti pogodan za život.