Question

What percentage light years away is that the nearest star?

Answer 1

A star is an astronomical object consisting of a luminous spheroid of plasma held together by its own gravity. The closest star to Earth is that the Sun. Most present elements heavier than helium are created by stellar nucleosynthesis in stars or their remnants.

Complete answer:
The closest Star to the world is three stars within the Alpha Centauri system. The 2 main stars are Alpha Centauri A and Alpha Centauri B, which form a binary pair. They're a mean of 4.3 light-years from Earth. The third star is Proxima. It's about 4.22 light-years from Earth and is the closest star aside from the sun.
Alpha Centauri A and B orbit a standard center of gravity every 80 years. The typical distance between them is about 23 astronomical units (AU) — a touch quite the space between the sun and Uranus. Proxima is about one-fifth of a light-year or 13,000 AUs from the 2 other stars, a distance that creates some astronomers questioning whether it should be considered a part of an equivalent system.
Proxima Centauri could also be passing through the system and can leave the vicinity in several million years, or it's going to be gravitationally sure to the binary pair. If it's bound, it's an orbital period around the other two of about 500,000 years.

Note:
Astronomers announced in August 2016 that they had detected an Earth-size planet orbiting Proxima. The newfound world, referred to as Proxima b, is about 1.3 times more massive than Earth, which suggests that the Exoplanet may be a rocky world, researchers said.