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Breakthrough S1 Ep30: ExoplanetsThe Spitzer Telescope makes a groundbreaking discovery of exoplanets that could be similar to Earth.

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Now PlayingBreakthrough S1 Ep30: ExoplanetsThe Spitzer Telescope makes a groundbreaking discovery of exoplanets that could be similar to Earth.0Breakthrough S1 Ep38: Cassini: The Grand FinaleThe Cassini spacecraft rewrites the textbook on Saturn, its moons and the solar system before its 20-year mission ends.