he Hubble's resolution is about 10 times better, or about 0.1 arc seconds. The Large Space Telescope program as planned in 1979 called for a return to Earth, refurbishment, and relaunch every 5 years, with on orbit servicing every 2.5 years, and at that time, hardware lifetime and reliability requirements were based on that 2.5 year interval between servicing missions. In 1985, contamination and structural loading concerns associated with return to Earth aboard the shuttle changed plans and eliminated the concept of ground return from the program, and NASA then decided that on orbit servicing might be adequate to maintain the Hubble for its 15 year design life. NASA adopted a three year cycle of on orbit ser
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