Crepuscular rays are light beams that appear to radiate from the sun. They are usually visible at sunrise or sunset, when the sun is low on the horizon. They form when light shines through gaps in clouds or other objects, and is scattered by atmospheric particles or moisture.
A moon halo, or lunar halo, is a bright ring of light around the moon. It is caused by moonlight refracting through hexagonal ice crystals, found in high-altitude cirrus clouds. These crystals, acting as tiny prisms bend the light at a 22° angle. Lunar halos often indicate approaching rain or snow as these high clouds…