Universe

The Universe Do you know how big the Universe really is? Do you know how many volcanoes there are on Io? Do you know the name of the nearest galaxy to earth? Click on the Start button below and take a tour through The Scale of the Universe to find out! What's it like to live in space? Ever wondered how you sleep in space? Do you want to know what zero gravity is all about? Click on the NASA logo and the astronauts on The International Space Station can tell you! Can you find your way around the Night Sky? Learn some of the basics about constellations, planets and stars and find out just what's in the sky this week.