Proxima (Latin for "closest") is a small, dim, cool star invisible to the eye, a tiny speck of starlight in the Southern Milky Way. It is the "C" member of a triple system, Alpha Centauri A and B, 4.36 ly distant. The former is a mag 0.01 G star not very different from our Sun; the "B" member is mag 1.34 K star, somewhat fainter and slightly cooler than Sol. It also has been found to have a planet. Both are easily visible to the naked eye, Although to resolve them into separate stars does require some optical aid, such as binoculars. Do not confuse Alpha Cen with nearby Beta Cen, a background object over 400 ly away. Proxima orbits the A and B pair, and is currently on the side of its orbit nearest Earth, which makes it the closest known star to us. Both A and B are somewhat older than our sun, and not too different in temperature and luminosity. Both are far enough apart that other habitable planets in stable orbits around this system cannot be ruled out. What a gift! You couldn't ask for a better destination for our first extraterrestrial probe: two sunlike stars with at least 1 planet, and a third member with a planet in its habzone.

Beware, the members of a multiple star system are called A, B, C etc, and planets of a star are also denoted a, b, c and so on. So confusion is possible. This new planet should be designated Alpha Centauri C(b).

The Wiki article has lots of useful info on this fascinating system. A fusion-powered Daedalus-type probe could go there, fly right through the middle of this system and beam back the data in less than a human lifetime, all at sub-relativistic velocities.

https://en.wikipedia.org/wiki/Alpha_Centauri

Alpha, Beta, and Proxima (circled in red).