Geography

Northern Lights


The aurora borealis and austral are visual phenomena that occur in the polar regions of our planet. They are colored lights that appear in the sky at night.

Usually there is the greenish light. These phenomena occur as a function of the contact of the solar winds with the magnetic field of planet Earth.

When the phenomenon happens in regions near the north pole, it is called aurora borealis; at the south pole there is the aurora austral. Phenomena are most common between February, March, April, September, and October.

The aurora borealis can come in various formats such as: bright spots, horizontal or circular stripes. However, they always appear aligned with the terrestrial magnetic field. Colors can vary widely, such as red, orange, blue, green and yellow. Often several colors appear at the same time.

However, if on one hand we are presented with this beautiful light show of nature, on the other we are harmed. The same solar winds that cause this beautiful spectacle interfere with media (television signals, radars, telephony, satellites) and various electronic systems.

Curiosities

  • The name aurora borealis was given by astronomer Galileo Galilei in honor of the Roman goddess Aurora (dawn) and her son, the Greek god of the strong wind, Boreas.
  • This phenomenon is not restricted to Earth, it also occurs on other planets of the solar system such as Jupiter, Mars, Venus and Saturn and can also be reproduced artificially.
  • The place with the highest incidence of polar night is in Finnish Lapland.