Background decoration Telescopes from the Ground Up title decoration.

Explore the history
of telescopes, from Galileo to NASA's Great Observatories.

Click to see the Early Reflectors era. Click to see the Early Refractors era. Click to see the Galileo era. Click to see the Great Refractors era. Click to see the Huge Reflectors era. Click to see the Multiple Mirrors Telescope era. Click to see the Newtonian era. Click to see the Radio era. Click to see the Solar Telescope era. Click to see the Space Telescope era. Click to go to the Get to the Root of It explanations.Return to the Amazing Space website. View the activity's site map.