article_snippet: However, it can also be seen behaving like a particle - like photons hurled out as radiation by materials like uranium or when gas high in the atmosphere is battered by the solar wind to produce the aurora over the poles.
article_snippet: The Aurora Borealis (shown above) is caused by photons particles thrown out by gas atoms high in the Earth's atmosphere as they collide with high energy charged particles carried by the solar wind from the sun .