Neil deGrasse Tyson
Followers: 127K
Sample tweet: "Oh, and happy first day of Autumn to the 20% of Earth's humans (and 100% of Earth's Penguins) who live in Southern Hemisphere."
Host of PBS's NOVA ScienceNOW series ("Blowing your mind since 1974"), astrophysicist Neil deGrasse Tyson is also the director of the American Museum of Natural History's world-famous Hayden Planetarium. Tyson is a luminary of space exploration — appointed by former President George W. Bush to serve on both the Commission on the Future of the United States Aerospace Industry and the President's Commission on Implementation of United States Space Exploration Policy — but he's also an International Latin Ballroom champion and oenophile who has been featured in Wine Spectator. If they're lucky, followers may get a few tips on wine selection.