Let's make this birthday one to remember.

71 years old (Born on April 29, 1953)

Happy Birthday, Nikolai! You've orbited Earth countless times aboard Mir and the International Space Station—clearly, you're someone who takes "going around in circles" to a whole new level. Your adventures have inspired many of us down here on solid ground; after all, not everyone can say they've had their morning coffee floating upside-down.

May your birthday be filled with laughter as boundless as zero gravity and cake slices that don't float away. Here's hoping retirement is treating you well—though we suspect nothing quite compares to the view from space. Cheers to another stellar year ahead for our favorite cosmonaut!