• 

  Erik Thompson

  饰：Self - Narrator,

• 

  Clifford V. Johnson

  饰：Self - Univ. of Southern California,(as Clifford Johnson)

• 

  Alex Filippenko

  饰：Self - Univ. of California, Berkeley

• 

  Charles Beichman

  饰：Self - NASA Exoplanet Science Institute

• 

  Ryan C. Johnson

  饰：Special Effects artist