“2017年IAO理论高年组第1题-双星”的版本间的差异
来自astro-init
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==英文题目== | ==英文题目== | ||
β-1.Double star. A double star consists Of components by all physical characteristics equal to α Centauri A and α Centauri B, which are rotating around the common center Of gravity by circular orbits. As observed from the Earth the angular distance between the components varies from 0.17" till 2.2" with a period Of τ= 39.6 years. Find the apparent magnitude of every component and also their combined magnitude. | β-1.Double star. A double star consists Of components by all physical characteristics equal to α Centauri A and α Centauri B, which are rotating around the common center Of gravity by circular orbits. As observed from the Earth the angular distance between the components varies from 0.17" till 2.2" with a period Of τ= 39.6 years. Find the apparent magnitude of every component and also their combined magnitude. | ||
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2019年8月17日 (六) 00:55的版本
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低年组对应问题：2017年IAO理论低年组第1题-双星
英文题目
β-1.Double star. A double star consists Of components by all physical characteristics equal to α Centauri A and α Centauri B, which are rotating around the common center Of gravity by circular orbits. As observed from the Earth the angular distance between the components varies from 0.17" till 2.2" with a period Of τ= 39.6 years. Find the apparent magnitude of every component and also their combined magnitude.
