What is the name of the star nearest to earth?

Answer 1

The star nearest to the Earth is Sun, but except Sun,

The closest star system that we know of is Alpha Centauri, located about 4.37 light years away (41.5 trillion km). The system easy to see with the unaided eye - if you live in the Southern hemisphere. In fact, Alpha Centauri is the 4th brightest star in the star in the sky.

Alpha Centauri is actually made up of three stars orbiting one another. They're too bright to be seen as separate stars without a telescope. But with a telescope, it's possible to split the star into two. These are Alpha Centuari A and B.

Neither of them is very closer to the Earth.

The Alpha Centauri system has a third, much dimmer star called Proxima Centauri. While Alpha Centauri A and B are 4.37 light-years away, The red dwarf Proxima Centauri is located a mere 4.22 light-years away. Alpha Centauri orbit one another, getting as close as 11.2 astronomical units (the distance from the Sun to Saturn), while Proxima Centauri is about 13,000 astronomical units away. Most astronomers think that Proxima Centauri orbits the binary pair, but there are some who think it's just passing by, and not actually part of the system.