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Loading contentAn enormous halo of tenuous, million-degree gas that surrounds the Milky Way, detectable in X-rays and in absorption against distant sources. This hot corona is a reservoir of baryons and the medium through which fresh gas accretes onto the Galaxy and enriched gas is expelled.
Facts on this topic will be cited from these primary and reference sources.
Mission data, planetary science, space telescopes, and public-domain imagery.
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