Jingsong Guo：创建页面，内容为“==英文题目== 1. [5 pt] In order to detect an Earth-twin, we need significant advances in the precision of spectrographs to detect the periodic Doppler shift of…”

2020-03-09T10:10:35Z

创建页面，内容为“==英文题目== 1. [5 pt] In order to detect an Earth-twin, we need significant advances in the precision of spectrographs to detect the periodic Doppler shift of…”

新页面

==英文题目==

1. [5 pt] In order to detect an Earth-twin, we need significant advances in the precision of spectrographs
to detect the periodic Doppler shift of nearby stars. Estimate the radial velocity semi-amplitude, in m/s,
that a planet with the mass, radius, and semi-major axis of Earth would cause in the motion of a star with
the mass of the Sun. Assume that the Earth-twin has zero eccentricity. Note that the mass of Earth is
$$5.97 × 10^{24}$$ kg, and the distance from the Earth to the Sun is $$1.5 × 10^8$$ m.

2018年USAAAO短问题第1道 - 版本历史

Jingsong Guo：创建页面，内容为“==英文题目== 1. [5 pt] In order to detect an Earth-twin, we need significant advances in the precision of spectrographs to detect the periodic Doppler shift of…”