1930 AD
This is a picture of the discovery.
Lowell Observatory in Flagstaff.
This planet has caused much discussion. Some people say that it isn't a planet but a comet stuck in orbit. What planet is it?
This man spent his whole life devoted to this discovery?
Do you think there are other discoveries to be found in space? What do you think they are? How would you discover them?
Lowell Observatory
Planet information
Discoverer
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