关于这张图
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: <a href="http://go.nasa.gov/29VgLdK" rel="nofollow">go.nasa.gov/29VgLdK</a> Credit: NASA/CXC/M.Weiss/Ohio State/A Gupta et al <b><a href="http://www.nasa.gov/audience/formedia/features/MP_Photo_Guidelines.html" rel="nofollow">NASA image use pol…
