Observing the space and the invention of Telescopes

 

Galileo used lenses to collect light in his telescope .

Who was the first scientist who made astronomical telescope ?

 

" Galileo " was the first scientist who made an astronomical telescope in 1609 . It was made from lenses to collect light in his telescope . 

 

He managed to see the mountains of the moon through his telescope .

 

Modern telescopes 

 

The telescopes differ according to the type of rays that they receive such as visual light rays , infrared rays and ultraviolet rays .

 

Astronomers keep their telescopes in the observatories , These observatories have dome shape ceilings that are opened at night to direct the telescope towards any part of the sky .

 

The Observatories are at the top of the mountains .

In the observatories , The astronomers can work and telescopes are kept . The observatories are located over high mountains to obtain a clear vision for the space and monitoring it accurately .

 

Hubble telescope 

 

It is the most famous space monitoring telescope that revolves around the Earth in an orbit of 593 km higher than the surface of the sea . 

 

Its length  is 16 meters and it uses mirrors to collect light and electromagnetic waves . It was lunched in a space shuttle in 1990 after 10 years of  design and building it .

Hubble telescope uses mirrors to collect light and electromagnetic waves .

It is expected that Hubble telescope will be expired by 2014 , after 24 years of being operated .

 

Hubble telescope will fall to Earth in one of its oceans for its final destination .  

 

It provided us with the best photos of Earth and the space since 1990 and the new James web telescope will replace it .

 

Satellites

 

Satellites study the stars and Galaxies from their location outside the Earth's atmosphere , They are astronomical observatories that are provided with cameras and telescopes .

Satellites are a fixed window at space .

Sputnik was the first satellite that successfully launched  in an orbit around the Earth in 1957 , Several satellites and space stations were lunched in orbits around the Earth , They regularly send  their photos about the Earth and the spacious  universe .

Sputnik was the first satellite lunched in an orbit around the Earth .