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This 2015 artist's rendering provided by Northrop Grumman via NASA shows the James Webb Space Telescope. On Wednesday, June 27, 2018, NASA announced that the next-generation telescope will now fly no earlier than 2021 and the its lifetime cost is now expected to reach nearly $10 billion. (Northrop Grumman/NASA via AP)

This 2015 artist's rendering provided by Northrop Grumman via NASA shows the James Webb Space Telescope. On Wednesday, June 27, 2018, NASA announced that the next-generation telescope will now fly no earlier than 2021 and the its lifetime cost is now expected to reach nearly $10 billion. (Northrop Grumman/NASA via AP)

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