2025年9月9日
Up from the Earth: Gigantic Jet Lightning
Image Credit: NASA, Expedition 73, Nicole Ayers
Explanation: What’s that rising up from the Earth? When circling the Earth on the International Space Station early in July, astronaut Nicole Ayers saw an unusual type of lightning rising up from the Earth: a gigantic jet. The powerful jet appears near the center of the featured image in red, white, and blue. Giant jet lightning has only been known about for the past 25 years. The atmospheric jets are associated with thunderstorms and extend upwards towards Earth’s ionosphere. The lower part of the frame shows the Earth at night, with Earth’s thin atmosphere tinted green from airglow. City lights are visible, sometimes resolved, but usually creating diffuse white glows in intervening clouds. The top of the frame reveals distant stars in the dark night sky. The nature of gigantic jets and their possible association with other types of Transient Luminous Events (TLEs) such as blue jets and red sprites remain active topics of research.
Tomorrow’s picture: big sky lizard
从地球升起: 巨型喷流闪电
影像提供: NASA, Expedition 73, Nicole Ayers
说明: 那是什么从地球升起？当在国际空间站上环绕地球时，宇航员妮可·艾尔斯于七月初观察到一种不寻常的闪电从地球升起：一个巨大喷流。这个强大的喷流在特写影像的中央附近出现，呈现红、白、蓝三色。巨大喷流闪电在过去25年中才被人们所知。这些大气喷流与雷暴相关，并向上延伸至地球的电离层。影像的下方显示了夜晚的地球，地球的稀薄大气因大气辉光而呈现绿色。城市灯光可见，有时清晰可辨，但通常在云层中形成模糊的白色光晕。影像的顶部显示了遥远的星星在黑暗的夜空中闪烁。巨大喷流的特性及其与其他类型的高空短暂发光现象（TLEs）如蓝色喷流和红色精灵的可能关联仍然是活跃的研究主题。
明日的图片: big sky lizard
