Free Telescope: Galileo Design

Created by Liza 2010-05-18 15:03:31
Valid until: Forever
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In today’s every day life, if we say the word Telescope, it makes us think about complex machines. There are different types of telescopes - digital and some even orbiting in space. However, when the first Telescopes where pointed up into the sky, they where really simple devices. Galileo Galilei revolutionized Western Science with his telescope. He observed the skies with this telescope and changed our vision of the Universe. Today, the design he used is called Galileo Telescope in his honour. Telescopes can be Newtonian, Galileo, optical, radio, infrared, refracting, etc.

Learn how to build a free telescope, and observe the night skies. Remember, this design was the same design used to change the concepts of science. There are millions of stars and celestial objects to discover in the viewable sky.

Here is how to make a Galileo Telescope. You need two tubes, and two lenses.

Get your lenses: (Gaze into infinity)

You will need two lenses. One concave and one convex. The concave is to turn the magnified image upside down, and will be placed in the eye finder (short negative focal lens). The convex is the long positive focal length lens. It will be closer to the sky at the end of your telescope, it is called the objective. The power to zoom in and out will be defined by the ratio and separation between the two lenses.

The most important aspect of the construction of the telescope is the distance between one lens and the other. Therefore this design has a way to adjust this distance. This is not a unique design, you can make your own, experiment, and try out new things.

Those who know about telescope design say that the curved surfaces of the lenses should face outward.

Telescope structure: Build the tube like shape

You can use different tubes. Just get a 3-feet tube about 3 inches wide which comes with lids.Paint the tube and lids black, so light does not interfere with your astronomical observations. You will mount the objective to the lid. Poster tubes work well. Cut a hole to mount the objective lens on one of the lids. *Get a good grip on it.

Now get a tube slightly smaller (1 feet, 1 inch diameter) which will slide into the larger tube in the other end, this will be your eyepiece. The tube should be able to move but still be stable, so you will have to use build an inside support to hold the tube in place (in the exact center of the larger tube). *Cut a hole in the center of the other lid 1 inc in diameter in the center. Pass the small 1 inch tube through that hole. The smaller tube will hold your short negative focal lens. In the same way you attached the objective install the eyepiece at the end of the small tube (eyelid).

Make sure the structure is stable and lenses are fixed. The small tube should move in and out inside the center of the bigger tube with ease always in the center and fixed horizontally.

Visualize a telescope and you should be fine. Visualize the work done by men using similar designs and how they changed the course of history with the same device you hold in your hands and you should be inspired.

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