NASAのインスタグラム(nasagoddard) - 7月26日 02時37分

Our Milky Way galaxy and its small companions are surrounded by a giant halo of million-degree gas (seen in blue in this artists' rendition) that is only visible to X-ray telescopes in space. University of Michigan astronomers discovered that this massive hot halo spins in the same direction as the Milky Way disk and at a comparable speed.

Read more: http://go.nasa.gov/29VgLdK

Credit: NASA/CXC/M.Weiss/Ohio State/A Gupta et al #nasagoddard

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