浮游生物满月
(原标题: A Full Plankton Moon)
2024-03-11
浏览次数: 12
什么东西在夜里发光？这个夜晚的特点是常见的和不寻常的光的结合。也许最常见的辉光来自月球，一个可能很熟悉的物体。满月几乎垂直下降是因为观测者在地球赤道附近。随着月球落山，地球大气中的空气和气溶胶优先散射蓝光，使反射太阳的卫星在接近地平线时呈现红色。也许最不寻常的光芒来自生物发光的浮游生物，可能是不太熟悉的物体。人们认为，这些微小的生物发出蓝色的光，主要是为了惊吓和阻止捕食者。在这种情况下，发光主要是由含有浮游生物的海浪撞击海滩造成的。这张照片是一年前在马尔代夫的索内瓦富什岛拍摄的。你的天空惊喜：APOD在你的生日上展示了什么照片？(1995后)
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What glows in the night? This night featured a combination of usual and unusual glows. Perhaps the most usual glow was from the Moon, a potentially familiar object. The full Moon's nearly vertical descent results from the observer being near Earth's equator. As the Moon sets, air and aerosols in Earth's atmosphere preferentially scatter out blue light, making the Sun-reflecting satellite appear reddish when near the horizon. Perhaps the most unusual glow was from the bioluminescent plankton, likely less familiar objects. These microscopic creatures glow blue, it is thought, primarily to surprise and deter predators. In this case, the glow was caused primarily by plankton-containing waves crashing onto the beach. The image was taken on Soneva Fushi Island, Maldives just over one year ago. Your Sky Surprise: What picture did APOD feature on your birthday? (post 1995)
© Petr Horálek / Institute of Physics in Opava