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
Galileo Galilei turns 1917 Mercury years old on the 1st November, 2025. 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 
Terry Pratchett turns 126 Venus years old on the 2nd November, 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 Asaph Hall turns 814 Mercury years old on the 3rd November, 2025. Asaph Hall was an American astronomer who discovered the two moons of Mars, Phobos and Deimos. Links: Wikipedia, Other Space Birthdays For Asaph Hall 
Marie Curie turns 84 Mars years old on the 4th November, 2025. Marie Curie was a scientist who studied radioactivity. She was the first person to win two Nobel prizes, and is still the only person ever to win two in two different disciplines. Links: Amazon, Wikipedia, Other Space Birthdays For Marie Curie Marie Curie turns 656 Mercury years old on the 6th November, 2025. Marie Curie was a scientist who studied radioactivity. She was the first person to win two Nobel prizes, and is still the only person ever to win two in two different disciplines. Links: Amazon, Wikipedia, Other Space Birthdays For Marie Curie 
Marie Curie turns 158 Earth years old on the 7th November, 2025. Marie Curie was a scientist who studied radioactivity. She was the first person to win two Nobel prizes, and is still the only person ever to win two in two different disciplines. Links: Amazon, Wikipedia, Other Space Birthdays For Marie Curie Carl Sagan turns 91 Earth years old on the 9th November, 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 Arthur C. Clarke turns 448 Mercury years old on the 9th November, 2025. Arthur C. Clarke was a science fiction author who dreamed of the time humanity would escape from planet earth and explore the galaxy. Links: Amazon, Wikipedia, Other Space Birthdays For Arthur C. Clarke J. K. Rowling turns 98 Venus years old on the 14th November, 2025. 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 William Herschel turns 287 Earth years old on the 15th November, 2025. 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