ARRAKIHS (Analysis of Resolved Remnants of Accreted galaxies as a Key Instrument for Halo Surveys) is an F-class space mission of the European Space Agency (ESA), selected as the second Fast mission (F2) within the Cosmic Vision programme. The mission aims to test the Λ-Cold Dark Matter (ΛCDM) model by analysing discrepancies between theoretical predictions and observations of small-scale structures, such as tidal stellar streams and dwarf satellite galaxies. It is specifically designed to explore the low-surface-brightness Universe, targeting the faintest and most diffuse structures in galaxies across a statistical sample of nearby Milky Way-like galaxies. With a projected launch in 2030, the mission is led by Spain, with important contributions from Switzerland, Belgium, Austria, Sweden, Norway, Portugal, and the United Kingdom. It is named after the planet Arrakis from science fiction novel Dune. The name is a backronym of "Analysis of Resolved Remnants of Accreted galaxies as a Key Instrument for Halo Surveys".
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This article is an automated import of the Wikipedia article "ARRAKIHS", available at https://en.wikipedia.org/wiki/ARRAKIHS . Text is licensed under CC BY-SA 4.0.