PBS NewsHour

NASA’s new Webb space telescope opens its golden ‘eye’

The world’s most powerful telescope unfurled its final mirror today as it sped away to its final destination one million miles from earth. NASA completed the final step of the Webb telescope’s difficult two-week initiation process Saturday, unfolding the final 21-foot piece: its ‘golden eye.’ NPR science correspondent Joe Palca joins to explain more about the telescope's design and purpose.

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