The Astronaut Ghost was the disguise of Simon Simonson. He wanted revenge because his experiment didn't get to go into space, but Velma Dinkley's did. So he dressed up as the ghost to disrupt the mission.
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The Astronaut Ghost was the disguise of Simon Simonson. He wanted revenge because his experiment didn't get to go into space, but Velma Dinkley's did. So he dressed up as the ghost to disrupt the mission.