Lowell Observatory celebrates the 90th anniversary of Pluto?s discovery
It was discovered by a man in Flagstaff 90 years ago, and even though it is no longer a planet, the Lowell Observatory is celebrating the discovery of Pluto.
It was discovered by a man in Flagstaff 90 years ago, and even though it is no longer a planet, the Lowell Observatory is celebrating the discovery of Pluto.