Part 1 of Essay
The is one of the worlds most powerful earth-orbiting reflecting telescopes. With its capability of producing images from any wavelength, the HST is the eyes of the universe for scientists on earth. The HST has a capability of operating at any wavelength from a near infrared level to a visible range to an ultraviolet lev ....

Part 2 of Essay
.... due to the space shuttle Challenger disaster. During this period, HST was subjected to intense tests and observation in order to prepare its duty in space. The HST was finally launched aboard the STS-31 mission of the space shuttle Discovery on April 24, 1990. Shortly after its launch in 1990, an error was found in the HST main mirror, which caused the telescope to operate improperly. The main mirror was shaped too flat toward the edge of the lens itself. This caused the images to appear as a blur upon use ....