After all, you’re standing on one right now! But the scientific definition was fairly loose until recently. Astronomers put their heads together in 2006 and came up with three conditions for planethood: A planet must orbit the sun; it must be large enough that its own gravity molds it into a spherical shape, and it must have an orbit free of other small objects. Unfortunately Pluto failed to meet the third condition. It was downgraded to a ‘’dwarf planet.’’
Picture Credit : Google
