MediumScience
"I orbit a star, I have cleared my neighbourhood, and I am nearly round. I am something specific — not a moon, not a star, not an asteroid. What am I?"
Answer
A Planet
Explanation
The International Astronomical Union defines a planet as a body that orbits the sun, has sufficient mass to be roughly spherical, and has cleared its orbital neighbourhood of other debris. This definition famously reclassified Pluto as a dwarf planet.
This is a medium riddle in the Science category — Riddles about physics, space, biology and the laws of the universe.
Tags:spacescience
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