Psyche was a biological computer, developed by Mentor of Psychon, as part of Mentor's plan to restore Psychon's enviroment.
When a team from Moonbase Alpha visited Psychon, they discovered the computer required energy from human brains to function.
Because John Koenig was forced to destroy Psyche, the resulting power feedback triggered a series of explosions, which eventually destroyed the planet. Mentor's daughter Maya was able to escape the planet before it exploded,[1] and joined the staff of Moonbase as chief Science Officer, effectively succeding Victor Bergman in the role.[2]