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Essay

Essay: Stars in Exquisite Accuracy

There’s only one star that astronomers have a firm grasp on: the Sun. Fundamental facts about other stars remain elusive. Find out how a powerful interferometer atop Mount Wilson in Southern California hopes to change that.

Sloan_Vista_SMALL

Article

Article: Sloan Sweeps the Sky

Mapping one-quarter of the heavens in three dimensions — that’s the ambitious mission for the Sloan telescope at the Apache Point Observatory in the Sacramento Mountains of New Mexico. Find out what astronomers have discovered so far.

Interactive

Interactive: A Hotspot Trail

Yellowstone National Park lies above a stationary hotspot deep in Earth's mantle. See how previous volcanic eruptions of the hotspot have left a trail of calderas that ends, at the moment, with Yellowstone.

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