Pluto and the icy worlds of the Kuiper Belt
Chapter 1
The search for Planet X
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Chapter 2
The heart of Pluto
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Chapter 3
The weird worlds of the Kuiper Belt
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Chapter 4
The great planet debate
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Chapter 5
Beyond the icy frontier
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YOUR GOAL
Master of Pluto and the icy worlds of the Kuiper Belt
Ch 4 · The great planet debate
teacher Out in the Kuiper Belt, Pluto's giant nitrogen heart is breathing wind across the ice!
Fun Fact
Plutoed slang term: In 2006, the American Dialect Society voted plutoed, meaning to demote or devalue something, as its Word of the Year.
Glossary
dwarf planet (noun)
A celestial body resembling a small planet but lacking certain technical criteria required to be classified as such. In 2006, the International Astronomical Union reclassified Pluto under this category, triggering intense global controversy.
A celestial body resembling a small planet but lacking certain technical criteria required to be classified as such. In 2006, the International Astronomical Union reclassified Pluto under this category, triggering intense global controversy.