Other mistake: As Zoref pulls the reactor door open, the wig wrinkles up on the back of his neck. Also, when the door is half way open, he's still holding it, then he's suddenly several feet away from it when it's still swinging open.
Visible crew/equipment: After the creature that was Zoref pulls the reactor door open, the camera crew is reflected on the door's surface.
Other mistake: As they track Zoref, Victor calls for a view of Corridor 16, then after viewing it, calls for Corridor 49. In both views, it is the same Corridor, as evidenced by the number 16 on the lighted wall panel on the corner facing the camera.
Continuity mistake: As Zoreth looks around after his wife closes the door, he closes a book he's holding. A second later, he's holding it by one cover, the book hanging open.
Answer: Not necessarily - The gravitational fields of Earth and the Sun could have deflected the moon away from the solar system.
Seniram