Proxima Centauri b is an exoplanet orbiting within the habitable zone of the red dwarf star Proxima Centauri in the constellation Centaurus. It can also be referred to as Proxima b, or Alpha Centauri
Artist's conception of Proxima Centauri b as a terrestrial exoplanet, with Proxima Centauri and the Alpha Centauri system visible in the background. The actual appearance and composition of the exoplanet beyond this data is currently unknown.
Velocity of Proxima Centauri towards and away from the Earth as measured with the HARPS spectrograph during the first three months of 2016. The red symbols with black error bars represent data points, and the blue curve is a fit of the data. The amplitude and period of the motion were used to estimate the planet's minimum mass.
Overview and comparison of the orbital distance of the habitable zones of Proxima Centauri compared to the Solar System
Artist's conception of the surface of Proxima Centauri b. The Alpha Centauri AB binary system can be seen in the distance, to the upper right of Proxima, as two white dots.
In astronomy and astrobiology, the habitable zone, also known as the circumstellar habitable zone, or as the Goldilocks zone, is the range of orbits around a star within which a planetary surface coul
Edward Walter Maunder, British astronomer, who introduced the concept of habitable zones
Earth's hydrosphere. Water covers 71% of Earth's surface, with the global ocean accounting for 97.3% of the water distribution on Earth.
Natural shielding against space weather, such as the magnetosphere depicted in this artistic rendition, may be required for planets to sustain surface water for prolonged periods.
The habitable zone of Gliese 581 compared with the Solar System's habitable zone