Pluto Has Been Officially Reclassified as a Planet

Hard Science

Welcome to a solar system that, once again, has nine planets.

The story of the planet that could.

The IAU Style Manual (1989) PDF

IAU Homepage

FromQuarkstoQuasars

Founded in 1919, the International Astronomical Union is the body charged with officially naming the objects in our universe and "safeguarding the science of astronomy." Here's what they have to say about the names of celestial objects. 

/ Iau

Pluto Has Been Officially Reclassified as a Planet

What’s The Moon’s “Real” Name?

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