[Bill Hammack] elaborates on one such piece of engineering: The Alignment Optical Telescope. The telescope was used to find the position of the Lunar Module in space so that its guidance computer ...

Place those lenses in a tube and voilà, you have a spyglass ... Despite myriad embellishments, however, most optical telescopes in use in the 21st century derive from the two types developed ...

This telescope incorporates a manual focus adjustment with a micrometer scale, which is built into the design of the optical tube. This allows for simplified focusing by noting the "sweet spot ...

The planetarium's official purchase records detail the specifications of the newly acquired telescopes. The catadioptric ...

You and I are living through a revolution in amateur astronomy. Not long ago, I would have advised beginners to stay away ...

Want to see Mars at its brightest in January? The best telescopes for seeing planets give you the clearest views of our celestial neighbors. The new year is a great time to test out your ...

A telescope's main purpose is to collect light ... Some high-end models are sold as "optical-tube assembly only" versions.

After all, as a refractor telescope it uses a lens to form an image so it’s necessary to stand behind the optical tube to look through an eyepiece. There are fewer telescopes easier to set-up ...

Telescopes are devices used to observe the universe. There are many different types and some are even sited in space. Optical telescopes close optical telescopeA device used to see distant objects ...