A bright moon halo has caught the eye of skygazers this evening - though some are wondering what 'the ring of light' is.

A halo around the moon appears when a thin layer of cirrus cloud made up of ice crystals moves across the sky.

Worcester News: SKY: Tonight’s moon haloSKY: Tonight’s moon halo (Image: Newsquest)Worcester News: Refraction of the light by the ice crystals causes the halo to form.

The Met Office said: “When a ring appears around the Moon or Sun, sometimes referred to as haloes, this suggests rainfall may be approaching.

“The halo is caused by ice crystals formed in high clouds. These ice crystals then refract the light from the Moon or Sun.”