HUBBLE SPACE TELESCOPE
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The Hubble Space Telescope (HST) is a project developed by NASA and the ESA on a spatial optical telescope placed in low Earth orbit terrestrial (height 560 Km) from the Space Shuttle Discovery launched on April 24, 1990 on STS-31.

The orbital period is approximately 97 minutes.The observation outside the terrestrial atmosphere allows less distorted images, sharper and brighter. In May 2009 with a mission of the Space Shuttle Atlantis, was made the last telescope maintenance. Among the many discoveries, Hubble was the first to photograph some extrasolar planets.

 

                            

 The telescope is named in honor of American astronomer Edwin Hubble.Hubble is a Ritchey-Chretien reflector type with two mirrors.It weighs approximately 11 tons and is about 14 meters. The two solar panels are used to generate electricity.

                

   Eagle Nebula    

                                                                                      
Weight    -  24,500 lb (11,110 kg)

 Length  -  43.5 ft (15.9 m) 10 ft (3.1 m) , Light Shield and Forward Shell Diameter 14 ft (4.2 m) Equipment Section and Aft Shroud

Optical system  -  Ritchey-Chretien design Cassegrain telescope , Focal length 189 ft (56.7 m) folded to 21 ft (6.3 m) , Primary mirror 94.5 in. (2.4 m) in diameter , Secondary mirror 12.2 in. (0.3 m) in diameter Field of view See instruments/sensors , Pointing accuracy 0.007 arcsec for 24 hours , Magnitude range 5 mv to 30 mv (visual magnitude) , Wavelength range 1100 to 24,000 Å  , Angular resolution 0.1 arcsec at 6328 Å

Orbit  -  304 nmi (563 km),  inclined 28.5 degrees from equator , Orbit time 96 minutes per orbit                      Mission  -  20+ years

  (Photo credit ESA/NASA )      

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