An inferior planet is in superior conjunction when in line with the sun and the earth and on the far side of its orbit with respect to the latter ; when it lies between the sun and the earth it is said to be in inferior conjunction 当内行星运行至与地球和太阳成一直线时,称为上合,而运行至太阳和地球之间时,称为
英文解释
(astronomy) the alignment of the Earth and a planet on the opposite side of the sun