Proxima b, the closest Earth-size rocky planet, may be habitable — and NASA's James Webb Space Telescope may get a crucial first glimpse of the world.

Astronomers have detected evidence of a third planet orbiting Proxima Centauri, our sun’s nearest stellar neighbor at 25 trillion miles (40.2 trillion kilometers) away.

The relative sizes of the sun, Alpha Centauri A and B, Proxima Centauri and other stars (plus Jupiter). (Image credit: ESO) Its star, Proxima Centauri, is much fainter than the sun and just 0.12 ...

See our complete coverage of planet Proxima b. This Earth-sized alien world, discovered orbiting Proxima Centauri, may be able to host life.

Proxima b: How we will actually get to the new planet that could be a second Earth Nuclear thermal propulsion, fusion rockets or laser sails might all serve as our carriage to what could be our ...

A French physicist tweeted a photo he claimed to be the largest known image of Proxima Centauri, only to reveal that it was actually a piece of chorizo all along.