In 2019, NASA's James Webb Space Telescope will reveal the universe beyond what even Hubble can see. Webb is almost ready to join Hubble - built and tested across the US and around the world - and it will soon reveal the invisible universe of star and planetary birth, the assembly of key elements in galaxies, and first light more than 13 billion years ago. We discuss burning questions only Webb can answer, the first planned science studies already decided.

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