Hubble is the people's telescope.
The iconic observatory, which was deployed into Earth orbit by the space shuttle Discovery 30 years ago today (April 25), has fundamentally changed astronomers' understanding of the universe.
For example, Hubble imagery showed that the universe's expansion rate is accelerating, a surprising discovery that led to the postulation of dark energy, a mysterious repulsive force now thought to make up most of the cosmos.
But the Hubble Space Telescope's contributions extend far beyond the scientific sphere, into the everyday lives of regular people around the world. Anyone with an internet connection has probably seen at least a few of Hubble's amazing photos, which bring the beauty and mystery of the universe down to Earth like no instrument ever had before.
Read more here: Space.com
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