By Michael Hartley
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
William Shatner turns 50 Mars years old on the 6th April, 2025. William Shatner is most famous for his role as Captain James T. Kirk, from Star Trek. Links: Amazon, Wikipedia, Other Space Birthdays For William Shatner 
Johannes Kepler turns 1882 Mercury years old on the 8th April, 2025. 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 
George Takei turns 143 Venus years old on the 10th April, 2025. George Takei played helmsman Lieutenant Sulu in the original Star Trek series. Links: Amazon, Wikipedia, Facebook, Other Space Birthdays For George Takei Leonard Nimoy turns 50 Mars years old on the 10th April, 2025. 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 Johannes Kepler turns 241 Mars years old on the 10th April, 2025. 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 Carl Sagan turns 147 Venus years old on the 16th April, 2025. 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 
George Takei turns 88 Earth years old on the 20th April, 2025. George Takei played helmsman Lieutenant Sulu in the original Star Trek series. Links: Amazon, Wikipedia, Facebook, Other Space Birthdays For George Takei Terry Pratchett turns 77 Earth years old on the 28th April, 2025. Terry Pratchett is a British fantasy author, known and loved for his incredible Discworld series. Links: Amazon, Wikipedia, Official Website, Other Space Birthdays For Terry Pratchett Alan Turing turns 60 Mars years old on the 29th April, 2025. 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 Isaac Asimov turns 56 Mars years old on the 30th April, 2025. 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