And Then There Were Eight
Pluto has the dubious distinction of being the only one that got thrown out of the Planets Club. So why did Pluto get downgraded? It wasn’t a simple case of the telescopes back in those days not being sophisticated enough (although that did play its role too). Rather, people were looking for a planet. Why were they looking for one? Well, because Uranus’ orbit appeared to be disturbed in the 1840’s. They suspected another planet beyond Uranus was the culprit. And thus they found Neptune. On further analysis, it looked as if Neptune couldn’t have done it alone. And hence the hunt for another planet started. Percival Lowell (of the family referred to in the ditty about Boston being the home of the bean and the cod, where the Lowells spoke only to Cabots, while the Cabots spoke only to God) assigned his observatory to finding Planet X, as it was called then. Clyde Tombaugh found Planet X after Lowell’s death. And that’s why Pluto got to be called a planet. Then the questions sta...