关闭

澳际学费在线支付平台

GRE阅读:Black Holes.

刚刚更新 编辑: 浏览次数:293 移动端

  Astronomers think the object shown in this Chandra X-ray Observatory image (in box) may be an elusive intermediate-mass black hole. Located about 32 million light-years from Earth in the Messier 74 galaxy (M74), this object emits periodic bursts of x-rays at a rate that suggests it is much larger than a stellar-mass black hole but significantly smaller than the supermassive black holes found at the centers of galaxies. Few such middling black holes have been discovered, and scientists aren&apost sure how they form.

相关留学热词

  • 澳际QQ群:610247479
  • 澳际QQ群:445186879
  • 澳际QQ群:414525537