Here we see the astronauts working on the telescope in the Shuttle's cargo bay. Just this year a Space Shuttle went to the Space Telescope to fix it. The astronauts also put new cameras on the telescope. The Shuttle will visit the Space Telescope every 3 or 4 years to keep it working right . Some telescopes measure the light we can see with our eyes.
Some telescopes can measure the heat coming from the things in the sky.
Others, like this one, listen to the radio signals given off by the stars and galaxies. This radio telescope is shaped like a big dish. The things in space are very far away. People have only been able to go to the Moon and back but not to other planets. The stars are even further away.