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Since Pluto is clearly Planet Nine, I'm assuming this was written before 1930. (I'm only being a little facetious. According to https://www.amazon.com/Chasing-
by jkingsbery 8y ago
Since Pluto is clearly Planet Nine, I'm assuming this was written before 1930.
(I'm only being a little facetious. According to https://www.amazon.com/Chasing-New-Horizons-Inside-Mission-ebook/dp/B076H7LK8Y/ref=sr_1_1?ie=UTF8&qid=1545245406&sr=8-1&keywords=new+horizons https://www.amazon.com/Chasing-New-Horizons-Inside-Mission-e..., plenty of scientists consider Pluto a planet still.)
- OscarCunningham 8y agoMost definitions that make Pluto a planet would make it Planet Ten, because Ceres would also be a planet.
- mcv 8y agoIn the 19th century, Ceres, Pallas, Juno and Vesta were all considered planets for a while. At some point the solar system had 12 planets. Until people realised it was nuts to consider all asteroids planets. Just like what happened with Pluto upon the discovery of more Kuiper Belt objects.
- Zardoz84 8y agoPluto is a MINOR planet