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Curated OER
Nasa's the Space Place: Solar System: Pluto's Orbit
An illustration showing Pluto's and the other planet's orbits around the sun.
Curated OER
Xena Awarded
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.
Curated OER
New Horizons Salutes Voyager
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.