space-birthday

Space Birthday

Do you know how many Mars years old you are?

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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:
You need to enter the year correctly - your Jupiter birthday doesn't fall on the same day each year, in fact most years you don't even have one!

Celebrity Birthdays

 J. R. R. Tolkien turns 559 Mercury years old on the 23rd August, 2026. J. R. R. Tolkien was a linguist, who wrote the Hobbit for his children. It became so popular he wrote a sequel, Lord Of The Rings, and other novels.. Links: Amazon, Wikipedia, Other Space Birthdays For J. R. R. Tolkien
 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
 René Descartes turns 1787 Mercury years old on the 25th August, 2026. Descartes' work on mathematics was a great inspiration to Isaac Newton. Descartes made the famous quote "I think, therefore I am" (Cogito Ergo Sum). Links: Amazon, Wikipedia, Other Space Birthdays For René Descartes
 Asaph Hall turns 320 Venus years old on the 27th August, 2026. Asaph Hall was an American astronomer who discovered the two moons of Mars, Phobos and Deimos. Links: Wikipedia, Other Space Birthdays For Asaph Hall
 George Takei turns 371 Mercury years old on the 28th August, 2026. George Takei played helmsman Lieutenant Sulu in the original Star Trek series. Links: Amazon, Wikipedia, Facebook, Other Space Birthdays For George Takei
 Isaac Newton turns 1593 Mercury years old on the 29th August, 2026. Isaac Newton, amongst many other discoveries, developed a theory of gravity that helped explain how the planets move in their orbits. Links: Wikipedia, Other Space Birthdays For Isaac Newton
 Isaac Newton turns 204 Mars years old on the 5th September, 2026. Isaac Newton, amongst many other discoveries, developed a theory of gravity that helped explain how the planets move in their orbits. Links: Wikipedia, Other Space Birthdays For Isaac Newton
 William Herschel turns 1195 Mercury years old on the 9th September, 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
 Galileo Galilei turns 39 Jupiter years old on the 10th October, 2026. Galileo brought astronomy many leaps forward with his discoveries, including the discovery of the moons of Jupiter. Links: Amazon, Wikipedia, Other Space Birthdays For Galileo Galilei