Possible Clues:

• Unseen part of the moon
• Gary Larson comic, with 'The'
• Rarely photographed half of the moon
• The moon has one
• Comic strip that generated 23 books, with "The"
• Comic collected in 'The Chickens Are Restless,' with 'The'
• Unseen area of the moon
• Gary Larson strip, with 'The'
• Fade about, Sir, away from you