Telescopes Basics

How Telescopes work
Intro to Telescope
Telescope History
1st Galileo Telescope
Timeline of Telescope

Astronomy Today  Using a Telescope Buying a Telescope
Children Telescope
Kids' Toy Telescope

How to Make Telescopes

Amateurs Telescope
Building a Telescope Home-made Roof-Mounted Telescope
DIY Telescope

Making a Telescope  
Home-made Telescope

Telescope Components
Telescope Accessories
Telescope Parts Telescope Lenses Complete Telescope Kit
Telescope Patio Furniture 

Telescope Outdoor Furniture Celestron Nexstar 800 Accessories
Meade Telescope Accessories

Tasco Telescope Accessories

All about Hubble Spade Telescopes
Hubble Space Facts
History of Hubble Space Telescope Hubble Space Telescope and Galaxy Photography
Hubble Telescope Photography

Hubble Telescope Pictures
Hubble Space Tech.
Launching Hubble Space Tech.

Contact Us
Privacy Policy



Download FREE "Mystery of Telescopes" Ebook Now!

- What do you really want to do with your telescope?
- How much money do you want to spend?
- Things to consider when choosing different types of telescopes
- How to make your own telescope

and much more you'll discover inside..

Just type in your name and email address below and we'll send you the ebook instantly

Introduction to Galileo’s Telescope


Telescopes made their mark in the history almost 400 years back in early 1600’s. The desire to see the stars and the planets gave rise to the idea of Telescope by a man called Galileo.

Almost hundreds of years back, an Italian mathematician; Galileo dreamt about a mechanical device that could enable him to see stars, planets and other distant objects in the night and he eventually in 1609 he realized his dream by making a device which we today name as telescope.

The telescope of Galileo was able to spots on the moon’s surface. At that time, Galileo knew that he has done something that will be remembered forever. When he invented his telescope, he knew that has certainly made a history.

But soon, he made his findings as public by publishing them in a bulletin called as Message from the Stars. After his invention was revealed in front of the world, humanity came to know about their earth’s surroundings and neighbours.

Although the telescope made by Galileo was very simple in comparison with the one that are in use today but Galileo’s telescope provided the basic principles that are still in use. Galileo telescope was a tube light device with two lenses; the convex and the concave lens.

Convex lens are curved towards outside and concave lenses are curved towards inside. The concave lens was used as an eye-piece. Galileo was inspired by one of the invention of his time; spy glasses that were used to examine closely different enemy camps by the militants.

The main principle of Galileo’s telescope, and almost all of telescopes available today, was the combination of two lenses in order to gather more light. Human eye also acts as a lense but it can’t gather that much light.

The two lenses are used in telescopes that enable it to gather more light. According to the principle, the two lenses would gather the light and would focus the gathered light to build an image.

This image is formed due to refraction which is the reason that sometimes these telescopes are also called as the refractors or refracting telescopes. The term refracting, in the context of telescope, means the bending of the gathered light in order to form its image.

Galileo’s telescope was able to magnify an object about 30 times. The image made by the Galileo’s telescope was, however, distorted and blurred because of the shape of the lens.

Even then the Galileo’s telescope was one of the most exciting tools to view the night sky. Whenever you get success and fame, as a bonus, you get new enemies.

Some people said that planets can’t be seen with naked eye so there is no point in exploring them. Other said that it is only giving illusions to the people. Galileo kept on working hard and didn’t bother by these criticisms.

Another criticism that Galileo’s telescope faced was that the findings of the Galileo’s telescope was considered to be controversial since it was helping in proving the belief of Catholics Church that the Sun is in the centre of the Universe, not the earth.

Galileo’s telescope is also considered to be the father of all other telescopes since all telescopes evolved from Galileo’s telescope.

The principle that Galileo gave for his telescope are still used in the development of modern telescopes. Without Galileo’s telescope we wouldn’t have today’s modern telescopes that have enabled us to know about our earth and its surrounding.

Telescopes Types/Review
General Telescope Review
Celestron CPC800
Coronado Telescope
Galileo's Telescope
Reflector Telescope
LX2000R Telescope
Tasco 48t Telescope
Unitron Telescope
Well-known Telescopes

Telescopes Tech.
Current Telescopes Development
Next Generation Telescope
Optical Technology Telescope
Radio Technology Telescope

Galaxy Photography with Telescope
Telescope Photos Space Telescope Photographs
Colour Telescope Pictures
Spitzer Space Telescope Pictures
Very Large Telescope (VLT) Photographs