The supernova left behind a dense central core 12.5 miles wide that was first spotted in 1999 by NASA's Chandra X-ray Observatory.
超新星爆发后留下了一个直径12.5英里的致密核心，NASA的钱德拉X射线天文台于1999年第一次观察到了这一核心。
Now the galaxy is full of gas and dust, which could hide a distant supernova optically, but the remnant would still produce detectable radio waves and X-rays.
现在，星系充满了气体和灰尘，掩盖了遥远的超新星的可见性，但是(它的)残骸依然放射出可检测的无线电波和X射线。
The supernova explosions that create and spread heavy elements also unleash a torrent of high-energy radiation: gamma rays, X-rays, and ultraviolet light.
创造并散播重元素的超新星爆发同样释放出一股高能辐射的激流：伽玛射线，X射线，紫外线。
A supernova from a merger of two white dwarfs, on the other hand, would create significantly less X-ray emission than the accretion scenario.
相反，来自双白矮星并合的超新星产生的X射线辐射要比吸积少很多。
Astronomers studied the supernova using the Chandra X-ray space telescope launched by the American space agency Nasa in 1999.
天文学家利用钱德拉x光线太空望远镜研究这颗超新星。钱德拉x光线太空望远镜是1999年由美国空间管理机构Nasa发射的。
A Type 1a supernova caused by accreting material produces significant X-ray emission prior to the explosion.
由物质吸积导致的Ia型超新星会在爆发前产生大量的X射线辐射。
Supernova explosions release tremendous amounts of radio radiation, x-radiation and cosmic rays, as well as other elements.
超新星爆炸时发射出大量的无线电射线、X射线和宇宙射线以及其他粒子。
This image provided by NASA combines infrared images from the ground (red, green) with X-Ray data from NASA's Chandra X-Ray Observatory in the supernova remnant W49B.
由美国宇航局提供。这张图像结合了来自地面(红色、绿色)的红外图像和来自钱德拉X射线天文台超新星残骸W49B的X射线数据。
After studying the X-rays from the object, Patnaude says there's no direct evidence that the supernova 1979c actually left behind a black hole.
研究了来自物体的X射线后，巴特那德认为，没有直接的迹象能表明超新星1979c实际上是从一个黑洞后脱离的。
This supernova remnant is unusual in that its X-ray emissions are largely non-thermal in origin.
这一超新星残体的不寻常之处是，其x -射线发射基本上不是热源的。
The new one, spotted with NASA's Chandra X-Ray Observatory, is the aftermath of a supernova observed in 1979, when a star roughly 20 times the mass of the sun collapsed in on itself.
这个新黑洞是利用美国国家航空航天管理局的钱德拉x射线望远镜发现的，是由1979年观察到的一颗超新星所形成的，当时那颗质量相当于大约20个太阳的恒星自己塌缩后形成了超新星。
The new one, spotted with NASA's Chandra X-Ray Observatory, is the aftermath of a supernova observed in 1979, when a star roughly 20 times the mass of the sun collapsed in on itself.
这个新黑洞是利用美国国家航空航天管理局的钱德拉x射线望远镜发现的，是由1979年观察到的一颗超新星所形成的，当时那颗质量相当于大约20个太阳的恒星自己塌缩后形成了超新星。
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