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 Hubble telescope captures stellar fireworks show

    Source: Xinhua| 2019-07-02 00:12:42|Editor: Shi Yinglun
    Video PlayerClose

    WASHINGTON, July 1 (Xinhua) -- The Hubble Space Telescope has captured an ongoing fireworks show in the universe which started 170 years ago when a doomed super-massive star went through a titanic celestial outburst.

    The U.S. space agency telescope showed that the hot, expanding gases of the star in a double-star system 7,500 light-years away glowing in red, white and blue, taking the shape of a bipolar ballooning lobes of dust, gas and filaments, according to NASA's press release on Monday.

    The star called Eta Carinae may have initially weighed more than 150 suns and after its eruption, it was so bright that for a time became a navigational star for mariners in the southern seas, and now still visible to the unaided eye.

    Astronomers used Wide Field Camera 3 on Hubble to map the ultraviolet-light glow of magnesium embedded in warm gas, and they discovered a gas never seen before.

    "Most of the emission is located where we expected to find an empty cavity. This extra material is fast, and it 'ups the ante' in terms of the total energy for an already powerful stellar blast," said Nathan Smith at the University of Arizona in a statement.

    The newly revealed gas is important for understanding how the eruption began, because it represents the fast and energetic ejection of material that may have been expelled by the star shortly before the expulsion of the bipolar lobes, according to NASA.

    This technique of searching in ultraviolet light for warm gas could be used to study other stars and gaseous nebula, according to the researchers.

    TOP STORIES
    EDITOR’S CHOICE
    MOST VIEWED
    EXPLORE XINHUANET
    010020070750000000000000011100001381900361
    津市市| 壤塘县| 兰州市| 漳平市| 桂林市| 沙湾县| 加查县| 余江县| 舟曲县| 双桥区| 政和县| 泸西县| 隆昌县| 哈尔滨市| 宜兰市| 普定县| 饶阳县| 长海县| 益阳市| 阳信县| 调兵山市| 扎兰屯市| 桓仁| 泰宁县| 岳池县| 昭觉县| 开封县| 鄱阳县| 深水埗区| 威信县| 武陟县| 贵南县| 万盛区| 万宁市| 阿勒泰市| 竹山县| 教育| 开化县| 邵阳县| 龙州县| 宜春市|