Changes

==History==

==History==

Launch was years later than initially planned, due primarily to the [[Space Shuttle]] Challenger disaster. After launch, it was found that all of the images from the telescope were out of focus.  An investigation found that the primary mirror of the telescope had been ground to the wrong radius, preventing the telescope from properly focusing.  In December, 1993, the Space Shuttle Endeavor, during mission STS-61, captured the telescope and added a lens that corrected the defect in the primary mirror.  Since then, the Hubble Space Telescope has been an invaluable tool to [[astronomy|astronomers]].

Launch was years later than initially planned, due primarily to the [[Space Shuttle Challenger]] disaster. After launch, it was found that all of the images from the telescope were out of focus.  An investigation found that the primary mirror of the telescope had been ground to the wrong radius, preventing the telescope from properly focusing.  In December, 1993, the Space Shuttle Endeavor, during mission STS-61, captured the telescope and added a lens that corrected the defect in the primary mirror.  Since then, the Hubble Space Telescope has been an invaluable tool to [[astronomy|astronomers]].

Hubble has a resolution of just less than 0.1 arcsec in red light.<ref>One arcsec is 1/3600 of a degree.</ref> Its main imaging camera has 16 million pixels.

Hubble has a resolution of just less than 0.1 arcsec in red light.<ref>One arcsec is 1/3600 of a degree.</ref> Its main imaging camera has 16 million pixels.