Aurora

These mesmerising, glowing, oval shaped lights appear in the sky when sunlight photons collide with particles in a planet’s atmosphere. They occur near a planet’s magnetic poles and are caused by solar wind, which is a stream of charged particles that originate in the upper atmosphere of the Sun and consist mainly of electrons and protons. Green auroras are more common at lower altitudes, where atomic oxygen concentrations are higher, while red occurs at higher altitudes.

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