Possible Clues:

• Low northern celestial body
• Show one’s behind satellite
• It 'monthly changes in her circled orb,' in 'Romeo and Juliet'
• Satellite's second leg
• Low point for satellite
• Ocean of Storms site
• Twelve people have walked on it
• Sun's counterpart
• Image in the poster for 'E.T. the Extra-Terrestrial'
• Orbiter with phases