The reason is that atomic and nuclear physics is one of the great achievements of our age.

原因是原子和核物理学是我们这个时代的伟大成就之一。

There's not nearly as much oxygen as hydrogen, but kilo for kilo oxygen glows more brightly than hydrogen due to the atomic physics involved.

氧有，由于涉及到原子物理学的知识——每公斤氧比更亮。

On one hand, we have the theory of the big, general relativity, black holes, big bangs, and the theory of the small, quantum theory, atomic physics.

一方面，我们有大的广义相对论，黑洞，大爆炸理论和小的量子理论，原子物理学。