The AstroArt of David A. Hardy

Officially, Pluto is no longer a planet, but a dwarf planet. It was discovered by Clyde Tombaugh at Percival Lowell's observatory in Flagstaff, Arizona (which Hardy has visited), and for many years was the 'ninth planet'. It is now demoted to merely a Kuiper Belt object (see Space Debris), but it has a relatively large moon, Charon, and at least 3 smaller ones.