Cosmic ray

Increase of ionization with altitude as measured by Hess in 1912 (left) and by Kolhörster (right)

Hess lands after his balloon flight in 1912.

Cosmic rays are immensely high-energy radiation, mainly originating outside the Solar System. They may produce showers of secondary particles that penetrate and impact the Earth's atmosphere and sometimes even reach the surface. Composed primarily of high-energy protons and atomic nuclei, they are of mysterious origin. Data from the Fermi space telescope (2013) have been interpreted as evidence that a significant fraction of primary cosmic rays originate from the supernovae of massive stars. However, this is not thought to be their only source. Active galactic nuclei probably also produce cosmic rays.

单词	Cosmic particle
释义	Cosmic particle 原声例句美国历史频道纪录片《宇宙》 Cosmic particles from exploding stars way out in the galaxy trigger lightning. When these hit the atmosphere, they provide that spark. 宇宙粒子来自银河系外超新星爆发当它们袭击大气层时催生了闪电。生活大爆炸第8季 Can you believe there was a time when we would have needed an array of giant Cherenkov telescopes to detect cosmic particles? And here we are building our own multi-wire detector like a couple of badasses. 你能相信曾几何时，人类得靠着巨大的切伦科夫望远镜阵列来探测宇宙射线粒子吗？而如今我们自己就可以构建多线探测器，简直霸气到炸啊。英语百科 Cosmic ray Cosmic rays are immensely high-energy radiation, mainly originating outside the Solar System. They may produce showers of secondary particles that penetrate and impact the Earth's atmosphere and sometimes even reach the surface. Composed primarily of high-energy protons and atomic nuclei, they are of mysterious origin. Data from the Fermi space telescope (2013) have been interpreted as evidence that a significant fraction of primary cosmic rays originate from the supernovae of massive stars. However, this is not thought to be their only source. Active galactic nuclei probably also produce cosmic rays.
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Cosmic particle

Cosmic ray