When the sky over Yellowknife, Canada, lit up one cold March night with a spectacular Northern Lights display

Northern-Lights-Gif

Korean photographer Kwon O Chul

There are two types of auroras – Aurora Borealis, or ‘Northern Lights,’ and Aurora Australis, known as ‘Southern Lights.’

Auroras occur when highly charged electrons from the solar wind collide with atoms of oxygen and nitrogen in the earth’s atmosphere at altitudes from 20 to 200 miles above the planet’s surface. The interactions between the charged particles give off light.

Auroral displays appear in many colors: red, yellow, green, blue, and violet.

The color of the aurora depends on which atom is struck, and the altitude of the meeting. The common green hue is caused by colliding oxygen molecules at altitudes of up to 150 miles.

One Response to “When the sky over Yellowknife, Canada, lit up one cold March night with a spectacular Northern Lights display”

  1. […] When the sky over Yellowknife, Canada, lit up one cold March night with a spectacular Northern Light… […]

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