In November 1677, Halley observed a transit of the innermost planet, Mercury, from the desolate island of St Helena in the South Pacific.
1677年11月,哈雷在南太平洋荒凉的圣赫勒拿岛上观测到了水星(最靠近太阳的行星)的凌日现象。
In November 1677, Halley observed a transit of the innermost planet, Mercury, from the desolate island of St Helena in the South Pacific.
1677年11月,哈雷在南太平洋荒凉的圣赫勒拿岛上观测到了水星(最靠近太阳的行星)的凌日现象。
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