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NOVA· Season 42 · Episode 18

Invisible Universe Revealed

S42E18·8.0·April 22, 2015·1h·PBS

The Hubble Space Telescope's discoveries over past 25 years.

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#5In Season 42of 22 rated episodes

#122All-timeof 287 rated episodes

+0.3vs season avgSeason 42 averages 7.7

2015First airedApril 22, 2015

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