Let's make this birthday one to remember.

73 years old (Born on November 18, 1951)

Happy Birthday, Colonel Mark Brown! You've soared higher than most of us ever dream—literally. After two incredible space missions and over 10 days floating among the stars (including that mysterious Department of Defense mission we're still curious about), you've officially earned legendary status. Rumor has it NASA still checks with you before launching rockets, just to make sure they're doing it right.

Now retired but forever stellar, your adventures continue inspiring everyone around you. May this birthday be filled with laughter, joy—and gravity firmly beneath your feet for a change! Here's to another orbit around the sun; keep reaching for the stars!