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Einstein’s abandoned cosmological constant made a spectacular comeback when astronomers discovered that the universe’s expansion is accelerating. It now sits at the heart of our best cosmological ...

Astronomers using NASA’s James Webb Space Telescope have created the clearest map yet of the universe’s “cosmic web” — the enormous hidden structure that connects galaxies across space. By analyzing ...

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This article predates the current owners of Science Blog. It has not been reviewed under the current editorial process and is kept as part of the archive. The primary techniques for charting cosmic ...