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The Hubble space telescope was a total bust after it was dropped from space shuttle Discovery 20 years ago. But some fine tuning turned it into a grand scientific achievement.
Here are some of greatest discoveries and spectacular images from the orbiting space observatory which is about the size of a school bus.
A new photo from the recently refurbished Hubble Space Telescope shows one of the largest star-birth sections in the Carina galaxy.
NASA describes the image: "The image captures the top of a three-light-year-tall pillar of gas and dust that is being eaten away by the brilliant light from nearby bright stars. The pillar is also being pushed apart from within, as infant stars buried inside it fire off jets of gas that can be seen streaming from towering peaks like arrows sailing through the air."
Credit: NASA, ESA, and M. Livio and the Hubble 20th Anniversary Team (STScI)