Astronomy 2021A/B Study Guide - Midterm Guide: Composition B, Small-C, Gravitational Wave
14 Feb 2017
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1: approximately how many stars are there in the milky way galaxy, a few hundred million, a few hundred thousand, more than a hundred billion, a trillion or more. Answer: c: huge collections of stars in space containing anywhere form a few hundred million to more than a trillion stars are referred to as, island universes, galaxy clusters, star clusters, galaxies. Answer: a: the local group is an example of a, galaxy cluster, galaxy, supercluster, planetary system. Answer: d: which of the following words best describes the sum total of all matter and energy that exists, supercluster, universe, multiverse, macrocosm. Answer: c: the nearest star is at a distance of 4. 4 light-years. Given that light travels at 300,000 km/s in space, how far away is the nearest star in kilometers (km): 4. 2 1013 km, 2. 7 1015 km, 3. 0 108 km, 9. 5 1012 km.
