Neil DeGrasse Tyson to B.o.B.: The earth is not flat

NEW YORK, Jan. 26 (UPI) -- Rapper B.o.B. is convinced the Earth if flat, but celebrity astrophysicist Neil DeGrasse Tyson took to Twitter to release some of the musician's hot air.

Over the weekend, B.o.B. circulated several tweets insisting the earth is flat. "There's no way u can see all the evidence and not know...grow up," he wrote Sunday. "You can regurgitate force fed information all day...still doesn't change physics."

Famed Cosmos host Neil DeGrasse Tyson then stepped in, responding to B.o.B.'s tweet questioning the curve of the earth through a faraway photo of Manhattan.

"Earth's curve indeed blocks 150 (not 170) ft of Manhattan," Tyson wrote, debunking the pic's assertion. "But most buildings in midtown are waaay taller than that."

In response to another tweet speculating how the star Polaris could possibly be visible from the southern hemisphere, Tyson poked at B.o.B.'s thought process again. "Polaris is gone by 1.5 deg S. Latitude," he wrote. "You've never been south of Earth's Equator, or if so, you've never looked up."

"Flat Earth is a problem only when people in charge think that way," Tyson continued. "No law stops you from regressively basking in it."

"Duude -- to be clear: Being five centuries regressed in your reasoning doesn't mean we can't still like your music," he said.