The James Webb Space Telescope gazes out into space.

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The James Webb Space Telescope, the most powerful ever sent into orbit, is due to reveal spectacular new vistas of the Universe with unprecedented clarity on Tuesday.

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Distant galaxies, dazzling nebulae, and a distant big gas planet are among the observatory's first targets, according to NASA.

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However, the photographs themselves have been closely hidden in order to generate anticipation for the big revelation.

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"I'm looking forward to no longer having to maintain these secrets; it will be a huge relief," Klaus Pontoppidan, an astronomer at the Space .

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NASA Administrator Bill Nelson has promised the "deepest view of our Universe ever obtained."

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Webb's infrared capabilities are what set it apart, letting it to see past cosmic dust clouds and identify light from the first stars.

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That has been stretched into infrared wavelengths as the Universe has expanded.

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This allows it to see further back in time than any previous telescope, to just after the Big Bang 13.8 billion years ago.

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"When I first viewed the photographs... I immediately discovered three things about the Universe that I didn't know before," Dan Coe.

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an STSI astronomer and expert on the early Universe, told AFP. "It's completely blown my head."

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