Which astronomer championed the initial concept for an orbiting observatory decades before the HST's launch?

Answer

Lyman Spitzer Jr.

The text explicitly states that the idea for an orbital observatory had been championed by astronomer Lyman Spitzer Jr. decades earlier.

Which astronomer championed the initial concept for an orbiting observatory decades before the HST's launch?

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The Man the Hubble Space Telescope was Named After - YouTube

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