Related Clues:

• John Glenn's org.
• New Horizons launcher
• God of poetry
• Canadarm user, abbr.
• Org. with frequent launchings
• God of light
• Legendary twin
• Launch pad gp.
• Astronaut agcy.
• Booster grp.?
• Von Braun's org.
• Mercury overseer
• 'Apollo 13' org.
• Moon mission name
• Subject of a temple at Delphi