Astrophysicist Neil deGrasse Tyson appears at Convocation Hall on Friday, March 21, promoting ‘s new show, Cosmos, picks up where Carl Sagan left off more than three decades ago.

Carl Sagan hosted and co-wrote ‘Cosmos,’ a 13-part TV series that aired on PBS stations from 1980 to 1981. Mickey Adair/Michael Ochs Archives/Hulton Archive via Getty Images Sagan proposed a ...

Carl Sagan hosted and co-wrote ‘Cosmos,’ a 13-part TV series that aired on PBS stations from 1980 to 1981. Mickey Adair/Michael Ochs Archives/Hulton Archive via Getty Images ...