Question

What Causes the northern lights?

Answer 1

When the solar wind gets past the magnetic field and travels towards the Earth, it runs into the atmosphere. As the protons and electrons from the solar wind hit the particles in the Earth’s atmosphere, they release energy and this is what causes the northern lights.

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Answer 2

Answer: Auroras occur when charged particles (electrons and protons) collide with gases in Earth's upper atmosphere. Those collisions produce tiny flashes that fill the sky with colourful light. ... That is why auroras occur almost every night in the northern sky