Read about some of the most important space discoveries in recent times.

Learn all about Pluto ..its discovery, basic facts, recognition as a planet, and most recently, its 'demotion' from a planet to a dwarf planet. The brief, to the point text makes this site most suitable for younger researchers.

Learn fun facts and details about the atmosphere, geography, composition, and discovery of Pluto, a dwarf planet.

Until the discovery of Eris, Pluto was known as the largest Keiper belt object. This dwarf planet has replaced Pluto in size and is accompanied by a satellite that has been given the name Dysnomia. Learn about this distant world here...

This site describes the extended belt of small bodies residing just outside the orbit of Pluto, the Kuiper Belt.

This article discusses the life and scientific discoveries of Michael E. Brown. Learn how he is credited with downgrading Pluto from a planet to dwarf planet.

Students explore the outermost planets of our solar system: Saturn, Uranus and Neptune. They also learn about characteristics of Pluto and its interactions with Neptune. Students learn a little about the history of space travel as well...

This regularly updated site chronicles research, key facts, and the reasons for downgrading Pluto from a planet to dwarf planet. Recent discoveries from the New Horizon spacecraft and months of archived articles are kept here as well.

This regularly updated site chronicles research, key facts, and the reasons for downgrading Pluto from a planet to dwarf planet. Recent discoveries from the New Horizon spacecraft and months of archived articles are kept here as well.