In DepthAstronomy

NASA probe to make all-sky infrared map

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Science  22 Feb 2019:
Vol. 363, Issue 6429, pp. 803
DOI: 10.1126/science.363.6429.803

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Summary

A NASA mission is setting out to decipher some of the universe's oldest secrets from a cosmic web of galaxies. Rather than dotting the heavens evenly, galaxies are clumped into filaments, separated by enormous voids. By creating a 3D map of infrared light sources across billions of light-years, NASA's new space telescope, announced last week, would pinpoint 300 million galaxies to chart the evolution of this web across space and time. In its details, researchers hope to find clues to how the universe was born. The telescope would also capture the combined glow of all galaxies. Set to launch in 2023, the Spectro-Photometer for the History of the Universe, Epoch of Re-ionization, and Ices Explorer, a 20-centimeter space telescope, was selected as next in line for the agency's $250 million cost-capped middle-class explorer program.