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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 centre of the galaxy on nearly circular orbits, with rotation speed vc ? 220 km s?1 almost independent of radius r (unlike themotion of planets in the …
- Edisi
- -
- ISBN/ISSN
- -
- Deskripsi Fisik
- 145 hlm
- Judul Seri
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- No. Panggil
- 523.112 THE s
Karya Umum 
Filsafat 
Agama 
Ilmu-ilmu Sosial 
Bahasa 
Ilmu-ilmu Murni 
Ilmu-ilmu Terapan 
Kesenian, Hiburan, dan Olahraga 
Kesusastraan 
Geografi dan Sejarah