National Geographic Channel has renewed physicist Neil deGrasse Tysons talk show for season 3.
But his dream guest outside of President Obama hasnt appeared on the show yet.
One of them is Charlie Sheen,Tyson told EW last April.
Credit: Scott Gries/National Geographic Channels
[Sheen] spent 20 minutes asking me questions about the universe.
He says, If the Big Bang began everything, when did the galaxies form?
Could the stars come after that or before that?
How fast could most of it expanded to get as big as we are today?
NatGeo has also commissioned aStarTalkbook, which will be released with season 3.
