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Astronaut Kathryn Thornton works with instruments while on a spacewalk. A small part of Earth is visible behind her on the right.)

Astronaut Kathryn Thornton Works on Hubble Space Telescope

Astronaut Kathryn C. Thornton works with equipment associated with servicing chores on the Hubble Space Telescope during the fourth spacewalk on the 11-day mission.

Image Credit: NASA

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