By Michael Hartley
New: daily puzzles on Math Is Lit
Try my new mobile-friendly daily puzzle site:
If you were born on Mars, how old would you be today? Or how many times has Jupiter gone around the sun since you were born? What's your age in Venusian years? This page can tell you! Enter your and your friends' birthdays using the form below. The information will only be stored on this computer, not on the server, so don't worry! (PS - I also have some printable space birthday worksheets you can download if you want to do these calculations yourself.)
- Your/your friend's name:
- Your/your friend's birthday:
Celebrity Birthdays
Robin Williams turns 122 Venus years old on the 9th August, 2026. Robin Williams was a well-loved comedian and film actor, who started his rise to fame as the alien Mork in Mork and Mindy. Links: Amazon, Wikipedia, Other Space Birthdays For Robin Williams 
Leonard Nimoy turns 396 Mercury years old on the 10th August, 2026. Leonard Nimoy is most famous for his role as the Vulcan Spock in Star Trek. Links: Amazon, Wikipedia, Star Trek on Amazon, Other Space Birthdays For Leonard Nimoy Douglas Adams turns 309 Mercury years old on the 12th August, 2026. Douglas Adams wrote the famous Hitch Hiker "trilogy", in which the unfortunate Arthur Dent bounces through space and time like a billiard ball.. Links: Amazon, Wikipedia, Official Website, Other Space Birthdays For Douglas Adams Nicolaus Copernicus turns 2298 Mercury years old on the 12th August, 2026. Copernicus is famous for his model of the solar system that put the planets orbiting around the sun. . Links: Wikipedia, Amazon, Other Space Birthdays For Nicolaus Copernicus Carl Sagan turns 381 Mercury years old on the 14th August, 2026. Carl Sagan's writings have been incredibly inspirational in mankind's reach towards the planets and stars. Links: Amazon, Wikipedia, Official Site, Other Space Birthdays For Carl Sagan Johannes Kepler turns 739 Venus years old on the 17th August, 2026. Kepler made very careful observations of the planets, and discovered Kepler's laws of planetary motion, which helped Isaac Newton develop his theory of gravity. Links: Wikipedia, Other Space Birthdays For Johannes Kepler Douglas Adams turns 121 Venus years old on the 19th August, 2026. Douglas Adams wrote the famous Hitch Hiker "trilogy", in which the unfortunate Arthur Dent bounces through space and time like a billiard ball.. Links: Amazon, Wikipedia, Official Website, Other Space Birthdays For Douglas Adams Buzz Aldrin turns 157 Venus years old on the 22nd August, 2026. Buzz Aldrin was the second person to set foot on the moon. He also flew on one of the Gemini missions.. Links: Amazon, Wikipedia, Official Website, Other Space Birthdays For Buzz Aldrin 
William Herschel turns 153 Mars years old on the 24th August, 2026. William Herschel was an astronomer who discovered the planet Uranus, the first new planet discovered since ancient times.. Links: Amazon, Wikipedia, Other Space Birthdays For William Herschel 
Isaac Asimov turns 9 Jupiter years old on the 7th October, 2026. Isaac Asimov was a science fiction author famous for his Robots and Foundation series of stories. Links: Amazon, Wikipedia, Other Space Birthdays For Isaac Asimov