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Subject Item
dbpedia:Spiral_galaxy
rdfs:comment
A spiral galaxy is a certain kind of galaxy originally described by Edwin Hubble in his 1936 work The Realm of the Nebulae and, as such, forms part of the Hubble sequence. Spiral galaxies consist of a flat, rotating disc containing stars, gas and dust, and a central concentration of stars known as the bulge.
rdfs:seeAlso
dbpedia:Gravitationally_aligned_orbits dbpedia:Density_wave_theory
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