每十年至少有一颗超新星在我们的银河系中出现。
银河系中的超新星最有可能是大多数宇宙射线到达地球的来源。
Supernovas in the Milky Way are the likeliest source for most of the cosmic rays reaching Earth.
确实，Cheng预计银河中心激震前沿的能量将近是超新星爆发产生的能量的一百倍。
Indeed, Cheng expects that the energy of the shock front at the galactic centre is nearly 100 times greater than that created by a supernova explosion.
在银河系拥挤的中心区域存在着大量的大质量恒星，频繁的超新星爆发使得复杂生命形式的产生不是不可能就是极度困难。
In the crowded central regions of the galaxy, home to large Numbers of massive stars, supernovas are so common that the evolution of complex life-forms might be difficult if not impossible.
它们可以从地球所在的银河系中很多的事件里产生，如超新星事件等。
They originate from various events (supernovae and so on) within the Milky Way galaxy that is home to the Earth.
这些发现之前，多数的天文学家一直在争论银河系附近的巨星在其消亡前，抛弃了其大部分质量，这样就无法形成对不稳定超新星。
Before the findings, most astronomers had argued that gigantic stars in nearby galaxies slough off much of their mass before dying out, precluding a pair-instability supernova.
自1604年开普勒发现一颗超新星以来，天文学家便再也没有在我们的银河系发现这种天体。
Since Johannes Kepler's supernova was spotted in 1604, astronomershaven't witnessed one in our own galaxy.
作为银河系中已知的最年轻的中子星，Cas a诞生于330年前天文学家可能观测到的一次超新星爆发中。
The youngest known neutron star in the Milky Way, Cas a was born in a supernova explosion that astronomers may have spotted 330 years ago.
Ia型超新星是由像太阳一样重却像地球一样小的致密星爆炸而成，这样一颗超新星所发射出的光和整个银河系一样多。
It is an explosion of an old compact star that is as heavy as the Sun but as small as the Earth. A single such supernova can emit as much light as a whole galaxy.
天文学观察很好地支持了宇宙中黑洞存在，特别从研究来自活跃的银河核心超新星和X光辐射。
The existence of black holes in the universe is well supported by astronomical observation, particularly from studying supernovae and X-ray emissions from active galactic nuclei.
天文学家使用美国国家航空和宇宙航行局的斯皮策太空望远镜于2007年8月末，在距离地球30亿光年的银河系中首次发现了这个超新星。
Astronomers first spotted the supernova in a galaxy some 3 billion light years from Earth in late August 2007 using NASA's Spitzer Space Telescope.
超新星的残骸位于银河系的平面内，距离地球2600光年。
The supernova remnant is within the plane of our Milky way Galaxy and is 2,600 light-years away.
但是，要验证这项理论却非常困难，因为自1680年起银河系内就不曾发生超新星爆发事件。
Testing this theory has been difficult, however, because no supernova has gone off in our galaxy since 1680.
在1987年2月23日，天文学家获得了次佳的机会：银河系的卫星星系“大麦哲伦云”中，发生了一次超新星爆发。
On February 23, 1987, astronomers got the next best thing: a supernova in one of the Milky Way's satellite galaxies, the Large Magellanic Cloud.
在1987年2月23日，天文学家获得了次佳的机会：银河系的卫星星系大麦哲伦云中，发生了一次超新星爆发。
On February 23, 1987, astronomers got the next best thing: a supernova in one of the Milky Way 's satellite galaxies, the large Magellanic cloud.
超新星是那种爆发时常简短地使整个银河都为之失色的星。
Shadow-casting Supernova Supernovas are exploding stars that often briefly outshine entire galaxies.
我们自己的太阳和行星也是由同样的超新星灰烬构成的，它们在很多亿年前在银河系里爆炸而成。
Our own sun and planets are constructed from similar debris of supernovae that exploded in the Milky Way billions of years ago.
我们自己的太阳和行星也是由同样的超新星灰烬构成的，它们在很多亿年前在银河系里爆炸而成。
Our own sun and planets are constructed from similar debris of supernovae that exploded in the Milky Way billions of years ago.
应用推荐