
These minor ‘planets’ are now divided into two classes: dwarf planets, and Small Solar System Bodies (SSSBs). Between the orbits of Mars and Jupiter lies what is termed the Main Belt of what are still universally called asteroids, the largest of which, Ceres, has been elevated to dwarf planet status.

The Sun is the Solar System's star and by far its most massive component. Its large mass (332,900 ), which comprises 99.86% of all the mass in the Solar System, produces temperatures and densities in its high enough to sustain nuclear fusion of hydrogen into helium. This releases an enormous amount of , mostly into as peaking in .