Nightly Aurora

Aurora

An aurora is a natural light display in Earth's upper atmosphere caused by charged particles from the Sun colliding with atoms in the atmosphere. These collisions excite oxygen and nitrogen, which then emit light of different colours such as green, red, and purple. When observed in high-latitude regions they are called polar lights and aurora polaris. In the Arctic they are called the northern lights or aurora borealis; in the Antarctic, the term southern lights or aurora australis is used. Auroras display dynamic patterns of radiant light that appear as curtains, rays, spirals or dynamic flickers covering the entire sky.

nightly

Adjective

1. Happening or appearing in the night; night-time; nocturnal.
2. Performing, occurring, or taking place every night.

Adverb

1. Every night.

aurora

Noun

1. An atmospheric phenomenon created by charged particles from the sun striking the upper atmosphere, creating coloured lights in the sky. It is usually named australis or borealis based on whether it is in the Southern or Northern Hemisphere respectively.
2. The Roman goddess of the dawn, equivalent to the Greek Ἠώς (Ēṓs).