Many astronomers had thought that Pluto should not be considered a planet, but rather one of the larger members of the Kuiper Belt - planetoids which orbit the Sun in the outer reaches of the Solar System beyond Neptune (so-called Trans-Neptunian Objects, or TNOs). The first Kuiper Belt ...
Many astronomers had thought that Pluto should not be considered a planet, but rather one of the larger members of the Kuiper Belt - planetoids which orbit the Sun in the outer reaches of the Solar System beyond Neptune (so-called Trans-Neptunian Objects, or TNOs). The first Kuiper Belt ...