Astronomy

Plastic lenses are most often found on astronomical telescopes, the oculars (eyepieces) used with telescopes and in binoculars; however, they may be found in a variety of optical applications. In...

Telescopes have been used to view objects at a distance for centuries. Over the years, basic telescope structure has become more complex, and many variations on this simple idea have been created....

Amateur astronomy is a popular hobby, and many people engaging in it want some way to record their most impressive observations. Astrophotography, defined as any photography of the heavens, is the...

There really isn't much difference between a telescope and a camera lens. A telescope is just a lens used to enlarge objects over a greater distance. And while you camera's zoom may not be large...

For those that may be considering the purchase of a refractor telescope, this article with give a few basic facts about their history, design and average costs.

You can make a simple telescope with two convex lenses. A critical step in making the scope is determining how far apart to place the lenses. If you know their focal lengths, simply add them...

A telescope is a simple device used in astronomy. Telescopes can magnify far away objects to make it easier to see them. You can use a telescope to see the craters of the moon, Saturn's rings,...

X-ray telescopes collect the X-rays that are emitted from the sun, stars, and super novas in space using a series of curved lenses and an electronic eye. This technology permits astronomers to...

Optical telescopes use a series of lenses or a curved mirror to focus visible light. Optical telescopes that only use lenses are called refracting telescopes. Optical telescopes that use a...

Telescopes allow you to see objects that are far away. You can make a basic, workable refracting telescope using just two lenses and a sturdy cardboard tube. Learning to use a telescope is very...

Making a telescope at home is a fun, simple activity which requires very few materials. A basic refracting telescope can be made using two lenses and two sturdy cardboard tubes. Of course, you can...

Based on telescopes that were created by astronomer Galileo, the Galileo telescope offers a unique and surprisingly effective way to view the stars. While the Galileo telescope offers a limited...

You'll first need two magnifying glasses, ideally around 1 to 1.5 inches in diameter. Be sure that one of the magnifying glasses is larger than the other. You will need a solid cardboard tube to...

Do you feel like cleaning your eyepieces? Here are some things you might want to consider before touching the lenses. After which, if you still decide to clean them, clean away!

There are many different ways that you can build a telescope with cardboard tubes, mirrors, lenses and some basic supplies. The easiest project is a simple refracting telescope using two lenses...

Similar in function to the human eye, telescopes work by gathering and focusing light. But, unlike the eye, which is limited by its available space and size, telescopes can be modified to take in...

Comets start out as large pieces of ice and rock floating around in the Oort Cloud, a gigantic, spherical cloud that surrounds the planetary system. When gravity from something large, such as a...

Searching for an easy craft idea for you and your child that is both fun and educational? Nothing quite captures a child's imagination like the star-filled night sky...so why not try making your...

Create your very own, totally manual Gallilean telescope!