The Earths Sun can be seen in the distance of this artwork of Eris, a dwarf planet on the outer fringes of our solar system. Eris is about more massive than Pluto and about three times farther away from the Sun.
Hunting For Big Planets Far Beyond Pluto May Soon Be Easier
Between the orbits of Mars and Jupiter spins an asteroid belt, and in that asteroid belt is the inner solar system's dwarf planet. Ceres makes up a third of the asteroid belt's mass, and, with a diameter of 950 kilometres (590 miles), it was originally thought to have been a planet on its discovery in 1801.