Four hundred years since Galileo invented the first telescope, today's high-tech telescopes can show us giant clouds where stars and planets are born. We can watch stars exploding, galaxies colliding, and the violence of black holes. Help your students explore how revolutions in telescope technology continue to push forward the frontiers of space.
Hunting the Edge of Space: The Mystery of the Milky Way (Video)
Follow the journey of the telescope, from Galileo to Cassini. Then find out what we're learning about our galaxy and beyond from today's powerful technology. (Chapters 2, 3, and 6, approx. 28 min.; Program available after broadcast)
Giant Telescopes of Tomorrow (Slideshow)
Take a closer look at the innovative telescopes that promise to make astonishing new discoveries about our cosmos.
Two Types of Telescopes (Article)
Learn about Galileo's refractor and Newton's reflector, the two standard types of optical telescopes today.
How Hubble Sees (Interactive)
Assemble the famous image of the Eagle Nebula from the telescope's raw data.