The Day the Earth Stood Still

===Science consultant===

===Science consultant===

[[Samuel Herrick (astronomer)|Samuel Herrick]], professor of Astrophysics at UCLA, was hired by producer Julian Blaustein as science consultant for the film.<ref>{{Cite book |last=Kirby |first=David A. |url=https://mitpress.mit.edu/9780262518703/lab-coats-in-hollywood/ |title=Lab Coats in Hollywood: Science, Scientists, and Cinema |publisher=MIT Press |year=2011 |location=Cambridge, Mass. |pages=40 |archive-url=https://archive.org/details/labcoatsinhollyw0000kirb/page/40/mode/2up |archive-date=2020-07-23}}</ref> Although Herrick may have been consulted on the speed and path of the space ship, he was most influential in regards to the equations which appear on Prof. Barnhardt's blackboard. "Herrick reasoned that an equation related to celestial mechanics would be most appropriate, specifically an equation related to his own work on the "[[three-body problem]]" in astronavigation."<ref>{{Cite book |last=Kirby |first=David A. |url=https://mitpress.mit.edu/9780262518703/lab-coats-in-hollywood/ |title=Lab Coats in Hollywood: Science, Scientists, and Cinema |publisher=MIT Press |year=2011 |location=Cambridge, Mass. |pages=80-81 |archive-url=https://archive.org/details/labcoatsinhollyw0000kirb/page/80/mode/2up |archive-date=2020-07-23}} Figure 4.4 on page 81 also includes a photo of astrophysicist Samuel Herrick and actor Michael Rennie standing in front of the blackboard with his equations on it.</ref> It must be noted that someone other than Herrick made additions to the blackboard: The '''"0!''', '''"0!!''' and '''"0!!!!?''' have absolutely nothing to do with anything else on the board. The "'''!'''" symbol simply means "the [[factorial]] of" or successive factorials of whatever precedes it; which for 0 (or 1) is always 1, something an astrophysicist wouldn't need to question.

[[Samuel Herrick (astronomer)|Samuel Herrick]], an astrophysicist at UCLA, developed the equations on Prof. Barnhardt's blackboard. "Herrick reasoned that an equation related to celestial mechanics would be most appropriate, specifically an equation related to his own work on the "[[three-body problem]]" in astronavigation."<ref name="Kirby-p80-81">{{Cite book |last=Kirby |first=David A. |url=https://mitpress.mit.edu/9780262518703/lab-coats-in-hollywood/ |title=Lab Coats in Hollywood: Science, Scientists, and Cinema |publisher=MIT Press |year=2011 |location=Cambridge, Mass. |pages=80-81 |archive-url=https://archive.org/details/labcoatsinhollyw0000kirb/page/80/mode/2up |archive-date=2020-07-23}} Figure 4.4 on page 81 also includes a photograph of astrophysicist Samuel Herrick and actor Michael Rennie standing in front of the blackboard with his equations on it.</ref>

===Filming===

===Filming===