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Biman Nath 《Resonance》2009,14(3):226-235
Soon after the discovery that we live in a separate galaxy and that there are many other galaxies in the universe, Hubble
designed a classification scheme of galaxies based on their appearances. It was such a robust scheme that it continues to
be one of the basic tools of modern astronomy, and motivates astronomers to look for connections between different types of
galaxies. 相似文献