What star is closest to your solar system?

Proxima Centauri, roughly 4.243 light years from our Solar System. Its a Red dwarf and is part of Alpha Centauri system which includes 3 stars. Alpha Centauri A and Alpha Centauri B are about 4.37 light years away. and the planet Eris is red it is about 3 billion miles away from the Sun and it is 1 billion miles away from our Earth.
Proxima Centauri

4.2421 light years away