So, the International Astronomy Union (IAU) is hosting a contest in 100 plus countries to name an exoplanet assigned by the IAU to each country. At first glance, it appears that almost all of the planets are hot Jupiters, although I did see a planet with an orbital period of 464 days. Here's the website: IAU100 Name ExoWorlds - An IAU100 Global Event . The United States
Well, it's a enormous ball of gas and hot air in an eccentric orbit, so maybe it should be named <your least favorite politician here>. Seriously, though, the rules prevent naming it after living individuals or individuals who have died less than 100 years ago. In addition, names can not be of persons, places or events known for political,
Well, the best known American astronomer who died prior to 1920 was probably Percival Lowell. You know, the guy who got Mars wildly wrong. And Venus. On the plus side, he was responsible for the observatory in Flagstaff, Arizona as well as others. By and large, though, most well known American astronomers are either still living or dead well after 1920.
Or locations. Most planets are named for personifications, but I don't believe they have to be, right? A historic Native American (or other colonized people's) location might be an excellent choice, since so many of them have been taken away.