'May you keep flying like superman in microgravity' NASA and more react to Stephen Hawking's death

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ABC's Molly Hunter reports on the warm tributes to renowned physicist Stephen Hawking. (Markus Schreiber/AP Photo)

Renowned physicist Stephen Hawking has passed away at age 76. After the world learned the news, everyone from fellow scientists to the CEO of Google to Oscar-nominated actors took to social media to honor Hawking's legacy.

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