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The spiral galaxy M 83 as seen at radio wavelengths. The false color image shows the neutral hydrogen gas, which is much more extended than the starlight in this galaxy, shown at the same scale in the inset image. The black contours show the locations of the high-velocity neutral gas clouds discovered by the team from the University of Michigan. The largest clouds are found over the spiral arms of the galaxy, where star formation is thought to be ejecting material out of the plane of the galaxy.

Photo credit: University of Michigan and National Radio Astronomy Observatory