background radiation

The cosmic microwave background - the oldest light in the universe - traveled vast distances before reaching us. During its long journey, gravitational forces from massive cosmic structures caused its orbit to bend before it was captured by the South Pole Telescope. Credit: Zhaodi Pan/Argonne National Laboratory

The Antarctic telescope offers a map of the distribution of dark matter in the universe

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Argon is part of a multi-institutional effort to survey the skies for clues about the origins and nature of our universe.