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The Spectro-Photometer for the History of the Universe, Epoch of Reionization and Ices Explorer mission will provide the first all-sky spectral survey. Over a two-year planned mission, the SPHEREx Observatory will collect data on more than 300 million galaxies along with more than 100 million stars in the Milky Way in order to explore the origins of the universe. .
Launch date: April 1, 2025