The Alpha Centauri is the closest star to the Solar System. The Alpha Centauri is also known as our neighboring star. However, in space, Neighboring doesn't necessarily mean close. The Alpha Centauri is 4.3 light-years that's 25 trillion miles or 270,000, times the distance from the Earth to the Sun. With modern technology, a small space probe could reach the star in 20-years. However, it could take 50 years at max.
From Earth, the Alpha Centauri it's one of the brightest stars in the southern sky to the naked eye Alpha Centauri A & B appears to be one single star. Looking through a telescope, someone can view two stars Alpha Centauri A and its dimmer companion Alpha Centauri B. The Alpha Centauri A & Alpha Centauri B have masses similar to the Suns (1.989 × 10^30 kg). Both Alpha Centauri A and B orbit each other about the same distance that Uranus orbits the Sun; the Sun is 1.8362 billion miles away from Uranus.
Alpha Centauri was discovered in 1915, and in 2016 its only confirmed planet, Proxima Centauri b, was discovered.