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E-book Stars and Galaxies
Galaxies come in a range of colours and sizes. In spiral galaxies such as the Milky Way, most stars are in a thin disc. The disc of the Milky Way has a radius of about 15 kpc, and contains ? 6 × 1010M of stars. The disc stars rotate around the c…
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ISBN/ISSN-
Deskripsi Fisik145 hlm
Judul Seri-
No. Panggil523.112 THE s