金星的新月
(原标题: Crescents of Venus)
2023-08-26
浏览次数: 18
就像月亮经历月相一样，金星可见的阳光半球也有盈亏变化。这组望远镜拍摄的图像说明了金星在2023年作为我们的晚星出现期间的稳定变化。在地球和太阳之间的内部轨道上，金星在这段时间里变得越来越大，因为它正在接近地球。然而，随着这颗内行星向我们的视线靠近，它的月牙变窄了。8月13日，金星最接近地日线，但经过太阳以南约8度，达到了它的（非判断的）下合。现在，金星在黎明前的天空中闪耀在东方地平线上，完成了向地球晨星的转变。8月21日，美国国家航空航天局的帕克太阳探测器完成了第六次重力辅助飞越金星，利用这次相遇来操纵探测器接近太阳。
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Just as the Moon goes through phases, Venus' visible sunlit hemisphere waxes and wanes. This sequence of telescopic images illustrates the steady changes for Venus during its recent 2023 apparition as our evening star. Gliding along its interior orbit between Earth and Sun, Venus grows larger during that period because it is approaching planet Earth. Its crescent narrows though, as the inner planet swings closer to our line-of-sight to the Sun. Closest to the Earth-Sun line but passing about 8 degrees south of the Sun, on August 13 Venus reached its (non-judgmental) inferior conjunction. And now Venus shines above the eastern horizon in predawn skies, completing its transition to planet Earth's morning star. On August 21, NASA's Parker Solar Probe completed its sixth gravity assist flyby of Venus, using the encounter to maneuver the probe toward its closest approach yet to the Sun.
© Roberto Ortu