Earthbound - S1-E14
Character mistake: When Simmons tries to get out of the hibernation chamber, one of the aliens turns and looks at him, while the other one sits up. The shot pans back to Simmons face, then back at the aliens only to show them back in hibernation.
Answer: Not necessarily - The gravitational fields of Earth and the Sun could have deflected the moon away from the solar system.
Seniram