Benchmarks: April 24, 1990: The Hubble Space Telescope is launched

Five hundred and eighty kilometers above Earth, orbiting at more than 27,000 kilometers per hour, is a 12-ton, bus-sized eye on the universe: the Hubble Space Telescope. When Hubble launched aboard the space shuttle Discovery on April 24, 1990, scientists hoped it would provide answers to many of the great unknown questions of the day. How old is the universe? How fast is it expanding? What lies between galaxies?

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Kate S. Zalzal

Kate Zalzal

Zalzal is a freelance writer and former editorial intern for EARTH. She holds a master's degree in geoscience from University of Massachusetts Amherst and most recently studied paleoclimatology at the University of Colorado Boulder and the University of Iceland in Reykjavik. 

Monday, April 24, 2017 - 06:00

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