免费精品AB,亚洲日韩性欧美中文字幕,鲁丝无码一区二区三区,精品久久久久久成人AV,看av免费毛片手机播放,精品国际久久久久999波多野,又黄又爽又刺激又色的视频,亚洲无线码一区二区三区在线观看

        Astronomers find rare star system may produce gamma-ray burst: Aussie research

        Source: Xinhua| 2018-11-20 11:40:51|Editor: Li Xia
        Video PlayerClose

        SYDNEY, Nov. 20 (Xinhua) -- Astronomers from the University of Sydney have identified a "nearby" star system as having the potential to produce a gamma-ray burst, one of the most energetic events in the universe, second only to the big bang.

        According to a research published on Tuesday, Aussie scientists along with international colleagues revealed that they have located the rare system just 8,000 light years from earth, the first of its type to be found in our galaxy.

        "We knew immediately that we have found something quite exceptional, the luminosity across the spectrum from the radio to the infrared was off the charts," lead author Dr. Joe Callingham from the Netherlands Institute for Radio Astronomy said.

        The system was nicknamed Apep. Two of Apep's stars are of the Wolf-Rayet variety meaning they are massive and reaching the end of their life.

        Those stars could explode into supernovae at any time, and could result in a cataclysmic gamma-ray event combining with the system's extreme conditions.

        "The rapid rotation puts Apep into a whole new class," study co-author Dr. Benjamin Pope from New York University said.

        "Normal supernovae are already extreme events but adding rotation to the mix can really throw gasoline on the fire," Benjamin said.

        Scientists said that a gamma-ray burst from one of Apep's stars would have the capacity to strip the earth of its Ozone layer, while it appears not to be aimed at us at the moment.

        "Ultimately, we can't be certain what the future has in store for Apep," research group leader Professor Tuthillat from University of Sydney said.

        "The system might slow down enough so it explodes as a normal supernova rather than a gamma-ray burst. However, in the meantime, it is providing astronomers a ringside seat into beautiful and dangerous physics that we have not seen before in our galaxy," the group leader said.

        TOP STORIES
        EDITOR’S CHOICE
        MOST VIEWED
        EXPLORE XINHUANET
        010020070750000000000000011100001376192741