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
Johannes Kepler turns 1887 Mercury years old on the 22nd June, 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 
Alan Turing turns 114 Earth years old on the 23rd June, 2026. Alan Turing is famous for his efforts in WW2 to crack the Nazi "Enigma" code, and for his writings on Artificial Intelligence.. Links: Amazon, Wikipedia, Other Space Birthdays For Alan Turing 
J. K. Rowling turns 99 Venus years old on the 26th June, 2026. J. K. Rowling became famous for her Harry Potter series of books, after being rejected by eight different publishers. Links: Amazon, Wikipedia, Official Website, Other Space Birthdays For J. K. Rowling George Takei turns 145 Venus years old on the 4th July, 2026. George Takei played helmsman Lieutenant Sulu in the original Star Trek series. Links: Amazon, Wikipedia, Facebook, Other Space Birthdays For George Takei J. K. Rowling turns 253 Mercury years old on the 7th July, 2026. J. K. Rowling became famous for her Harry Potter series of books, after being rejected by eight different publishers. Links: Amazon, Wikipedia, Official Website, Other Space Birthdays For J. K. Rowling 
Neil Armstrong turns 51 Mars years old on the 8th July, 2026. Neil Armstrong was the first human being to set foot on the moon. Links: Amazon, Wikipedia, NASA, Other Space Birthdays For Neil Armstrong Carl Sagan turns 149 Venus years old on the 9th July, 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 Robin Williams turns 75 Earth years old on the 21st July, 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 
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