Proxima Centauri

Proxima Centauri is a small, low-mass star located 4.2465 light-years away from the Sun in the southern constellation of Centaurus. Its Latin name means the 'nearest [star] of Centaurus'. It was discovered in 1915 by Robert Innes and is the nearest-known star to the Sun. With a quiescent apparent magnitude 11.13, it is too faint to be seen with the unaided eye. Proxima Centauri is a member of the Alpha Centauri star system, being identified as component Alpha Centauri C, and is 2.18° to the southwest of the Alpha Centauri AB pair. It is currently 12,950 AU from AB, which it orbits with a period of about 550,000 years. Proxima Centauri is a red dwarf star with a mass about 12.5% of the Sun's mass, and average density about 33 times that of the Sun. Because of Proxima Centauri's proximity to Earth, its angular diameter can be measured directly. Its actual diameter is about one-seventh the diameter of the Sun.

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NASA just announced funding for 13 new "Innovative Advanced Concepts" under the NIAC program. They include a swarm of autonomous "gram-scale interstellar probes" designed to send back images of Proxima Centauri, and a sample return mission to Venus.

What Could the Extremely Large Telescope See at Proxima Centauri's Planet?

NASA Selects a Wild Plan to "Swarm" Proxima Centauri With Thousands of Tiny Probes

NASA Selects Bold Proposal to “Swarm” Proxima Centauri with Tiny Probes

Swarming Proxima Centauri: Coherent Picospacecraft Swarms Over Interstellar Distances

Will Solar Panels Work at Proxima Centauri?

Tiny Swarming Spacecraft Could Establish Communications with Proxima Centauri

Antimatter-driven Deceleration at Proxima Centauri

Light sail could reach Proxima Centauri in 20 years

Astronomers have discovered a third planet orbiting Proxima Centauri, the star closest to the Sun. It is probably smaller than Earth and could have water.

New Planet Discovered Next Door – Orbiting Proxima Centauri

A THIRD Planet Found Orbiting Nearby Proxima Centauri

New Planet Discovered Around Proxima Centauri, Star Nearest the Sun

Possible Third Planet Spotted around Proxima Centauri, Our Sun's Nearest Neighbor Star

Potential Third Planet Discovered Orbiting Proxima Centauri

New planet detected around Proxima Centauri, closest star our solar system

Possible 3rd planet spotted around Proxima Centauri, the sun's nearest neighbor star

How Astronomers Detected a Technosignature From Proxima Centauri — And Why They Rejected It

Maybe There’s No Way to Tell if Habitable Planets Orbit Proxima Centauri… Yet!

Breakthrough Starshot is a project to send a probe to the Earth-sized exoplanet Proxima Centauri b that's in the habitable zone of its star. At a speed of 20% of the speed of light, it will take around 25 years to complete the journey, and approximately 4 years for the data to travel back to Earth.