Which is the nearest planetary system to the Sun?

In terms of a confirmed planetary system, Epsilon Eridani with its tally of two detected planets (Epsilon Eridani b and c), seems the safest bet at the moment. This is a K2-class dwarf star located 10.8 light years from the Sun. The two Jupiter-sized planets orbit in highly elliptical paths, so that their temperatures must go through extremes even by the standards of Jupiter and Pluto in our own system whose average distances they mimic. This could also be a problem for any smaller planets interior to the orbit of Epsilon Eridani b, although it is possible that smaller planets near or within an Earth-like orbit could remain stable.

The so-called Habitable Zone for this star is between 0.4 and 0.6 AU so this is far enough from Epsilon Eridani b that the prospects could be promising for a stable, water-bearing planet or satellite. The probable age of the star is about one billion years making it a much younger planetary system than our own. It is known to have an orbiting dust disk at a distance of about 60 AU from the star. This star was also the target for a SETI search by astronomer Frank Drake in 1960.