Here's a breakdown:
* What it is: A halo is an optical phenomenon caused by the interaction of sunlight or moonlight with ice crystals suspended in the atmosphere.
* How it forms: When light passes through these hexagonal ice crystals, it gets refracted (bent) and reflected, creating a ring of light around the sun or moon.
* Types of halos: There are many different types of halos, but the most common is the 22° halo, which appears as a ring of light with a radius of about 22 degrees around the sun or moon.
* Other halo types: Other halo types include sundogs, sun pillars, and circumzenithal arcs.
Let me know if you'd like to learn more about specific types of halos!
