标签： 上弦月

天文·每日一图

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山与月的影子

2024年1月22日 Shadows of Mountain and Moon Image Credit & Copyright: Enzo Massa Micon Explanation: Can the Moon and a mountain really cast similar shadows? Yes, but the division between light and dark does not have to be aligned. Pictured, a quarter moon was captured above the mountain Grivola in Italy in early October of 2022. The Sun is to the right of th...

天文·每日一图

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弦月

2023年10月21日 Quarter Moons Image Credit & Copyright: Marcella Giulia Pace Explanation: Half way between New Moon and Full Moon is the Moon’s first quarter phase. That’s a quarter of the way around its moonthly orbit. At the first quarter phase, half the Moon’s visible side is illuminated by sunlight. For the Moon’s third quarter p...