蜜臀av性久久久久|国产免费久久精品99|国产99久久久久久免费|成人精品一区二区三区在线|日韩精品一区二区av在线|国产亚洲欧美在线观看四区|色噜噜综合亚洲av中文无码|99久久久国产精品免费播放器

<cite id="ygcks"><center id="ygcks"></center></cite>
  • 
    
  • <rt id="ygcks"></rt>
    <cite id="ygcks"></cite>
  • <li id="ygcks"><source id="ygcks"></source></li> <button id="ygcks"></button>
  • <button id="ygcks"></button>
    <button id="ygcks"><input id="ygcks"></input></button>
    
    
    <abbr id="ygcks"><source id="ygcks"></source></abbr>
    
    

    NASA's Cassini reveals new sculpting in Saturn rings

    Source: Xinhua| 2019-06-15 16:04:05|Editor: Li Xia
    Video PlayerClose

    LOS ANGELES, June 14 (Xinhua) -- A new analysis shows NASA's Cassini spacecraft provided intricate details on the workings of Saturn's complex rings as it dove close to Saturn in its final year, said a latest release of NASA's Jet Propulsion Laboratory (JPL).

    Although Cassini's mission ended in 2017, science continues to flow from the data collected.

    A new paper published Thursday in Science describes results from four Cassini instruments making their closest ever observations of the main rings.

    According to the JPL, the new findings include fine details of features sculpted by masses embedded within the rings. Textures and patterns, from clumpy to strawlike, pop out of the images, raising questions about the interactions that shaped them. New maps reveal how colors, chemistry and temperature change across the rings.

    The observations also deepen scientists' understanding of the complex Saturn system. Scientists conclude that at the outer edge of the main rings, a series of similar impact-generated streaks in the F ring have the same length and orientation, showing that they were likely caused by a flock of impactors that all struck the ring at the same time.

    This shows that the ring was shaped by streams of material that orbit Saturn itself rather than, for instance, by cometary debris that happened to crash into the rings.

    "These new details of how the moons are sculpting the rings in various ways provide a window into solar system formation, where you also have disks evolving under the influence of masses embedded within them," said lead author and Cassini scientist Matt Tiscareno.

    TOP STORIES
    EDITOR’S CHOICE
    MOST VIEWED
    EXPLORE XINHUANET
    010020070750000000000000011100001381457791
    田林县| 保亭| 屏东县| 扎鲁特旗| 喀什市| 合山市| 钟祥市| 砚山县| 正定县| 淳安县| 马龙县| 咸阳市| 达拉特旗| 额尔古纳市| 凉城县| 青海省| 乃东县| 大埔区| 资讯 | 遵义市| 西乡县| 株洲县| 洞口县| 富民县| 寻乌县| 巨鹿县| 东丽区| 汶上县| 柯坪县| 阿拉尔市| 连平县| 鲁山县| 台山市| 永昌县| 高要市| 南澳县| 锦屏县| 广东省| 厦门市| 天长市| 抚顺县|