Rap pioneer Joseph "Rev Run" Simmons and Wil Wheaton, who acted in "Star Trek: The Next Generation, " made cameos in the spot.

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The Jet Propulsion Laboratory's confirmed list of "VIP" guests included celebrities Alex Trebek, Chuck Lorre, Wil Wheaton, Nichelle Nichols, Bill Prady and June Lockhart.

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Wil Wheaton, who parlayed a child-actor stint on "Star Trek: The Next Generation" into becoming one of the Web's earliest star bloggers, wrote that he doesn't use Instagram.

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