 FACT: After the party, Lovell holds his thumb in front the gibbous  moon. Then, telling Marilyn where to find "her" mountain, he says  the Sea of Tranquility is "where the shadow crosses the white part."  The terminator was in fact near the Sea of Tranquility on July 20,  1969, but the moon was less than half full; its depicted in the  scene as gibbous, with the terminator on the other side.