On this day in 1990 - May 20th - the Hubble Space Telescope sent back its first image, that of several stars, captured with its Wide Field/Planetary Camera.
Unfortunately, they then discovered there was a flaw in the main mirror which meant fuzzy images for three years until the first shuttle servicing mission. Interestingly, the images were still much better than the ones from ground-based telescopes of the time.
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