Hubble Space Telescope Turns Twenty Years Old

Top astronomers who have worked on the Hubble Space Telescope over the past 20 years talk about their major discoveries that were made possible only with a spaceborne observatory. The 12-minute look at Hubble's top findings includes: galaxy evolution, dark matter, the age of the universe, black holes, extrasolar planets, and dark energy.

[NJCProductions]

An interesting fact: The Hubble's Main mirror had a defect when it was luanched. So almost every instrument that's install into Hubble after they found that out has an intentional offset to negate the mirror defect.

[BuzzDyou]

Everyone at JPL ( Jet Propulsion Labratories) already knew there was a defect in the parabolic reflector.. the key essence was to launch it and run it through its paces, it was far cheaper to keep'er in space than it was to warehouse it.. The cost was, if memory serves right, approx. 10milU$/year to store it in the dust free, humidity and temperature stable environment it needed, thus the launch and future planning for repairs... @jasleil lat'r Buzz..