Related Clues:

• Great times
• Astronomical periods
• Time and time again
• Astronomical figures
• Forever, seemingly
• A lo-o-ong time
• 'Toodles!'
• Time on end
• Many, many moons
• Countless ages
• 'Catch ya later!'
• 'Till we meet again'
• ''Cheerio!''
• 'Farewell'
• Millions of years