Himself

NASA Mars Landing (2021)

Release Date : 18/02/2021 Episode Count : 1

Host

Crash Course Astronomy (2015)

Release Date : 15/01/2015 Episode Count : 46

Himself

Das Universum - Eine Reise durch Raum und Zeit (2010)

Release Date : 25/04/2010 Episode Count : 6

Writer

Crash Course Astronomy (2015)

Release Date : 15/01/2015 Episode Count :

Book

Bad Universe (2010)

Release Date : 29/08/2010 Episode Count :