Colour of Auroras
• Green: Oxygen
• Red: Oxygen
• Blue / Purple: Nitrogen
How Auroras Are Formed
• Source of energy: The Sun releases charged particles (electrons, protons) through solar wind.
• Earth’s magnetic field: These charged particles are guided toward the polar regions by Earth’s magnetic field lines.
• Atmospheric collision: Particles collide with gases in the ionosphere/thermosphere.
• Energy release: Excited gases release energy as light, producing auroras.




