Sigrid Close

饰：Herself

Andy Howell

饰：Himself

玛丽·罗琦

Mary Roach

饰：自己

Michael J. Massimino

饰：Self

Geoff Marcy

饰：Self

Louis Friedman

饰：Self

Franklin Chang-Diaz

Franklin Chang-Diaz

饰：Self

Michelle Thaller

饰：Self

Lou Bloomfield

饰：Self

Doug Vakoch

饰：Self

Fritz Coleman

饰：Self

Russell Schweickart

饰：Self

Ashley Davies

饰：Self

Beau Weaver

Beau Weaver

饰：Narrator

David Kaplan

David Kaplan

饰：Self

David J. Helfand

饰：Self

H. Jay Melosh

饰：Self

Phil Plait

饰：Self

Dean Ho

饰：Self

Milton Garces

饰：Self

Jerry Kulcinski

饰：Self