2017年IAO理论低年组第2题-外星峰会

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高年组对应问题：2017年IAO理论高年组第2题-外星峰会

英文题目

α-2. Extraterrestrial summit. Extraterrestrial Bear and Extraterrestrial Penguin living in different planetary systems of our Galaxy, came to a summit organized at the Intercivilizational Space Station (ISS) somewhere in the depths of space, where no one star is visible brighter than 1^m. However, it appeared that both stars, from which planetary systems the Bear and the Penguin came, are visible with the naked eye at the summit (assume the sensitivity of the retina of these extraterrestrial animals to be the same as of humans), and the angular distance between them is equal to β = 30°.

2.1. Find the possible minimum and maximum linear distance between the native Stars Of the Bear and the Penguin. Consider the planetary systems are possible near the Stars Of spectral classes from A to M Of main sequence.

2.2. Include an artistic picture with an image of the Extraterrestrial Bear and Extraterrestrial Penguin (and possibly other extraterrestrial animals) on the ISS.

中文翻译

α-2. 外星人峰会。生活在我们银河系不同行星系统中的外星熊和外星企鹅，来到了一个在星际空间站（ISS）举办的峰会，该空间站位于宇宙深处，在那里没有任何恒星的亮度超过1等。然而，似乎熊和企鹅所在行星系统的恒星在峰会上用肉眼可见（假设这些外星动物的视网膜敏感度与人类相同），且它们之间的角距离等于β = 30°。

2.1. 找出熊星与企鹅星之间可能的最小和最大线距离。考虑这些恒星附近可能存在行星系统，其光谱型为主序星的A到M型。

2.2. 在国际空间站上加入一幅艺术画，画中有外星熊和外星企鹅（以及可能的其他外星动物）的形象。