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View Full Version : What is a galaxy? (Vote now!)



Fraser
2011-Jan-22, 06:40 PM
Classification is key to all sciences, but can often cause debate. Within astronomy, fierce debates have raged over the definition of a planet, both on the low-mass end, as well as the high-mass end. A recent paper explores definitions on a larger scale, pondering the definition of a galaxy, particularly, what separates the smallest of [...]

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