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nebula

المؤلف:  Simon Singh

المصدر:  Big Bang

الجزء والصفحة:  p-429

2026-10-27

103

nebula A cloud of gas and, often, dust in the Milky Way galaxy seen as an indistinct patch of light in the night sky, in contrast to the point-like stars. In the twentieth century, following the resolution of the Great Debate, many objects labelled as nebulae before 1900 were recognised to be separate galaxies.