Saturn, Titan, Rings, and Haze

Image Credit: NASA, ESA, JPL, SSI, CassiniImaging Team

Explanation: This is not a solar eclipse.Pictured here is a busy vista of moons and rings taken at Saturn. The largecircular object in the center of the image is Titan, the largest moon of Saturnand one of the most intriguing objects in the entire Solar System. The darkspot in the center is the main solid part of the moon. The bright surroundingring is atmospheric haze above Titan, gas that is scattering sunlight to acamera operating onboard the robotic Cassini spacecraft. Cutting horizontallyacross the image are the rings of Saturn, seen nearly edge on. At the lowerright of Titan is Enceladus, a small moon of Saturn. Since the image was takenpointing nearly at the Sun, the surfaces of Titan and Enceladus appear insilhouette, and the rings of Saturn appear similar to a photographic negative.Now if you look really really closely at Enceladus, you can see a hint of icyjets shooting out toward the bottom of the image. It is these jets thatinspired future proposals to land on Enceladus, burrow into the ice, and searchfor signs of extraterrestrial life.

土星、土衛(wèi)六、土星環(huán)和煙霾

這幅圖片呈現(xiàn)的不是日食，它呈現(xiàn)的是土星衛(wèi)星和土星環(huán)的熱鬧景象。影像中央的龐大圓形天體是土衛(wèi)六（泰坦），它是土星最大的衛(wèi)星，也是太陽(yáng)系中最引人注目的天體之一。土衛(wèi)六中央的黑點(diǎn)是其固體核心，它周?chē)髁恋墓猸h(huán)是土衛(wèi)六外層的大氣煙霾。這種氣體散射太陽(yáng)光，以致裝載在卡西尼號(hào)上的相機(jī)能夠捕捉到它。橫切過(guò)這幅圖像的是幾乎側(cè)視的土星環(huán)。土衛(wèi)六右下方的黑點(diǎn)是土星的一顆小衛(wèi)星土衛(wèi)二。由于這幅圖像幾乎是正對(duì)著太陽(yáng)拍攝的，土衛(wèi)六和土衛(wèi)二的表面呈現(xiàn)出剪影，土星環(huán)則看起來(lái)像一張照相底片。如果你非常仔細(xì)地觀察土衛(wèi)二，你可以看到一些正向影像底部噴發(fā)的冰冷噴流。這些冰冷噴流激發(fā)了人類(lèi)未來(lái)登陸土衛(wèi)二、探索冰層以及尋找外星生命跡象的愿望。

參考文獻(xiàn)：

https://apod./apod/image/1905/TitanBusy_Cassini_1080.jpg

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