Let's make this birthday one to remember.

73 years old (Born on October 03, 1951)

Happy Birthday, Kathryn! You've boldly gone where few have ventured—floating gracefully through space and making geology look cooler than ever. From your groundbreaking stroll among the stars as America's first woman to walk in space, you've truly rocked our world (pun absolutely intended).

And let's not forget when President Bush appointed you to the National Science Board—you've proven that reaching for the stars can lead right back down here on Earth with stellar success. May this birthday be filled with laughter brighter than a supernova and cake tastier than astronaut ice cream!

Keep inspiring us all—you're out of this world!