What causes a ring or halo around the Moon?

Jimmy Westlake: Ring around the moon

What Causes a Ring Around the Moon? People in the U.S. Spot 'Halo' in the Sky

BBC Sky At Night Magazine - Garry Hunt

Why Do We Sometimes See a Ring Around the Moon? - Universe Today

What Causes Sun and Moon Halos?

Sometimes, the moon appears with a halo in the night sky. Why does it happen? - Quora

See a ring around the sun or moon? It's a 22-degree halo

Lunar halo hi-res stock photography and images - Alamy

kleinhandel Cumulatief actrice moon halo ring accessoires Fictief operator

Unbelievable' moon 'halo' delights onlookers in UK, UK News

What makes a halo around the sun or moon?

Sometimes, the moon appears with a halo in the night sky. Why does it happen? - Quora

ဘာ့ကြောင့် လထီးဆောင်း တာလဲ – Myanmar Scientist

Astronomy for beginners BBC Sky At Night Magazine