Which renowned physicist served as a brand ambassador for Celestron telescopes in the 1990s, dramatically increasing amateur astronomy participation with their 'Window to the Universe' campaign?

The astronomy industry has seen fascinating collaborations between telescope manufacturers, observatories, and public figures to promote stargazing and space exploration. These brand ambassadors help bridge the gap between complex astronomical concepts and public engagement. Test your knowledge about a significant partnership that revolutionized how astronomy products were marketed to the general public.

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Stephen Hawking
Carl Sagan
Neil deGrasse Tyson
Brian Cox