美国宇航局科学
(原标题: NASA Science)
2026-10-08
浏览次数: 1818
土星系统是如何被拍得如此清晰的？天体摄影师汤姆·威廉姆斯在英国上空特殊的大气条件下捕捉到了如此精美的细节。这不仅仅意味着万里无云的天空。不同温度和密度的空气团在穿过地球大气层时四处移动，使光线弯曲，从而扭曲了天文图像。这叫做“看见”。较少的大气湍流意味着更清晰的图像。天文摄影师通过幸运的成像技术减少了视觉的影响：用高速相机快速拍摄数千张短曝光图像，并将最清晰的图像加起来。你对这个smörgåsbord中的哪个物品感兴趣？也许是土卫六或者土卫二的冰条纹？也许是土星环上的缝隙和辐条？10月4日，当地球经过土星和太阳之间时，土星冲日。由于这颗行星离太阳很近，而且被太阳完全照亮，现在是一年中观测它的好时机！明天的图景：坎坷
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How was the Saturn system imaged so clearly? Astrophotographer Tom Williams captured such exquisite details due to one night of exceptional atmospheric conditions above the United Kingdom. This means more than a cloudless sky. Pockets of air at different temperatures and densities move around and bend light as it travels through Earth’s atmosphere, distorting astronomy images. This is called “seeing.” Less atmospheric turbulence means clearer images. The astrophotographer reduced the impact of seeing with the lucky imaging technique: thousands of short-exposure images are taken very quickly with a high-speed camera and the clearest images are added up. Which object in this smörgåsbord interests you? Perhaps Titan or the icy stripes of Enceladus? Maybe the gaps and spokes in Saturn’s rings? Saturn's opposition, when Earth passes in between the planet and the Sun, occurred on October 4th. Due to the planet's proximity and full illumination from the Sun, now is a great time of year to observe it!Tomorrow's picture: bumpy