尼尔·德格拉塞·泰森

Neil deGrasse Tyson

饰：自己

Erik Thompson

饰：Self - Narrator

Alan Boss

饰：Self - Astrophysicist, Carnegie Institution

Laird Close

饰：Self - Astronomer, University of Arizona

Geoff Marcy

饰：Self - UC Berkeley

Alex Filippenko

饰：Self - UC Berkeley

Adam Showman

饰：Self - Planetary Scientist, University of Arizona