Question

What is aurora borealis (northern lights)? How do they form?​

Answer 1

Answer:Bottom line: When charged particles from the sun strike atoms in Earth's atmosphere, they cause electrons in the atoms to move to a higher-energy state. When the electrons drop back to a lower energy state, they release a photon: light. This process creates the beautiful aurora, or northern lights.

Explanation:

Answer 2

Answer:

It is a light show which is caused when electrically-charged particles from the sun collide with particles from gases such as oxygen and nitrogen present in the Earth's atmosphere. ... An aurora is caused by the streams of electrified particles (which are emitted by the sun) trapped in the magnetic field of the earth.