Astronomers make the case that a gigantic ridge of gas sticking out of the galactic plane was blown out by a cluster of nearby supernovae. The post What — and Where — Is the North Polar Spur? appeared first on Sky & Telescope.
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Astronomers make the case that a gigantic ridge of gas sticking out of the galactic plane was blown out by a cluster of nearby supernovae. The post What — and Where — Is the North Polar Spur? appeared first on Sky & Telescope.
Read More