The sun is approximately 25,000 light years away from the centre of the milky way and moves around it, in anapproximately circular path, in roughly 170 million years. let m be the mass of the galactic matter within aradius of 25,000 light years from the galactic centre. given that sunlight takes approximately 8 min to reach theearth, what is the ratio of m to the mass of the sun ?
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The ratio is the 1: 9.
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