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Scale. Your Age on Other Worlds. Looking at the numbers above, you'll immediately notice that you are different ages on the different planets.

Your Age on Other Worlds

This brings up the question of how we define the time intervals we measure. What is a day? What is a year? Apollo 11 - Moon - Sightseeings - Moon - Arounder. Interactive Universe. Ancient Observatories: Chaco Canyon. Welcome to the Cassiopeia Project. Sun Moon Scope. Current position of the International Space Station. NASA 360 Episodes. 50th Anniversary of NASA. Interactive 3D model of Solar System Planets and Night Sky. Education. We Choose the Moon: Celebrating the 40th Anniversary of the ...

Extreme Planet Makeover. Sixty Symbols - Physics and Astronomy videos. Sumanas. Animation Gallery. Star Viewer: an interactive map of the night sky. Science Videos Search Engine. Science Netlinks: Lesson Index.