Cool Explain How The Northern Lights Are Caused Ideas. These green bands of light in the winter sky above alaska are an aurora borealis. Web by fraser cain, universe today aurora dancing in the hvalfjörður fjord in iceland.

Not even knowing for sure what causes them. Web none of these stories, of course, can explain the true nature of the phenomenon. How the aurora are produced the sun is the nearest star to us at 93 million miles.