CK-12 Foundation
Ck 12: Earth Science: Telescopes Study Guide
[Free Registration/Login may be required to access all resource tools.] This study guide summarizes key points about electromagnetic radiation and the different types of telescopes that rely on various forms of it. Includes a few...
University of Wisconsin
The Why Files: Terrific Telescopes
Why? File provides insight into four advances in telescope technology as well as shows how they are "improving our harvest of cosmic understanding."
Optical Society
Optical Society of America: Optics for Kids: Make a Telescope
An activity for making a telescope using a cardboard tube and two lenses. Accompanied by an explanation of how the telescope works, and a link to an article about lenses.
Florida State University
Florida State University: Science, Optics & You: Galileo Galilei
Biography of Galileo Galilei (1564-1642), one of the most famous scientists and inventors of all time. He is best remembered for his invention of the telescope, which caused him to question the contemporary belief that the Earth was the...
NPR: National Public Radio
Npr: New Observatory Brings Stars Closer to Earth
A radio story describing the development of the newest technology in telescopes based on an old idea. Images of the 80-acre interferometer are shown on the site.
Georgia State University
Georgia State University: Hyper Physics: Lens Maker's Formula
A discussion of the lens-maker's formula and its use in determining the effect of lens shape and index of refraction upon the magnifying power of a lens. Includes an interactive problem-solving section.