Gallery: Hubble's greatest hits - 20th anniversary

Gallery: Hubble's greatest hits - 20th anniversary

Summary: 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.

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TOPICS: Nasa / Space
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  • NASA scientists stitched together a mosaic of 78 exposures taken by the ACS, showcasing 80 galaxies.

    Credit: NASA

  • The arcs and streaks in galaxy cluster Abell 370 reveal "gravitational lensing," the distortion of light from far-off, background galaxies by the cluster's gravitational field. The lensing effect helps astronomers measure the distribution of dark matter in galaxy clusters.

    Credit: NASA

  • A blob of matter, called HST-1, was ejected from a black hole, giving us a spectacular light show. The Hubble had been tracking this activity for 7 years.

    Credit: NASA, ESA, and J. Madrid (McMaster University)

Topic: Nasa / Space

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