Tag
IAU
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The Pluto Demotion: Why Is Pluto Not a Planet Anymore?
The controversy persists today, not because the science is unclear, but because the IAU’s criteria remain contentious. Pluto’s orbit, size, and composition...
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The Cosmic Count: How Many Planets Define Our Solar System and Beyond
Beyond our solar system, the discovery of exoplanets—planets orbiting other stars—has exploded the scale of the question. With thousands confirmed and more...