2017年01月21日:造浪者土卫三十五-(Daphnis the Wavemaker)

2017年01月21日:造浪者土卫三十五-(Daphnis the Wavemaker)

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2017-01-21 / 0 评论 / 0 阅读 / 正在检测是否收录...

2017年01月21日:造浪者土卫三十五-(Daphnis the Wavemaker)
2017年01月21日:造浪者土卫三十五-(Daphnis the Wavemaker)--原图下载


Image Credit: Cassini Imaging Team, SSI, JPL, ESA,NASA
说明: 俯冲接近土星环的外缘之时,卡西尼号太空船在1月16日,拍下了到目前土卫三十五最接近的影像。这颗宽8公里的小卫星,正在土星明亮环系的基勒缝内造浪。这道宽42公里的外围环缝,因为受到拍照时卡西尼号视角的影响,在影像出现透视缩小。随着在这颗小卫星由左向右移动,在它微弱引力的扰动之下,环缝边缘的环系物质受到牵引形成波浪。此外,还有一抹昏暗的波浪状环系物质紧跟在土卫三十五的后方。在影像中,土卫三十五的细部结构清楚可见,包括在它赤道、可能是由环系粒子所聚成的狭窄突脊。

原文:

Image Credit: Cassini Imaging Team, SSI, JPL, ESA,NASA
Explanation: Plungingclose to the outer edges of Saturn's rings, onJanuary 16 the Cassini spacecraft captured thisclosestyet view of Daphnis.About 8 kilometers across and orbiting within the bright ring system'sKeeler gap, the small moon ismaking waves.The 42-kilometer wide outer gapis foreshortened in the image by Cassini'sviewing angle.Raised by the influenced of the small moon's weak gravityas it crosses the frame from left to right,the waves are formed in the ring material at the edge of the gap.A faint wave-like trace of ring material is just visible trailingclose behind Daphnis.Remarkable details on Daphnis can also be seen, including anarrow ridge around its equator, likely an accumulation of particlesfrom the ring.

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