Hakeem Oluseyi

饰：Himself, Astrophysicist

Phil Plait

饰：Self - Astronomer

Andres Williams

Andres Williams

Michelle Thaller

饰：Self - Astronomer

埃里克·罗兰

Eric Loren

饰：Narrator

Sylvester James Gates Jr.

饰：Self - Theoretical Physicist

Michael J. Massimino

饰：Self - Astronaut