Aureole

{
  "id": "MLC-T-MET-003703",
  "term": "Aureole",
  "field": "Meteorology and atmospheric science",
  "definition": "A small, colored ring or series of rings observed around the sun or moon, typically appearing white or bluish immediately around the luminary, surrounded by reddish-brown. It is caused by the diffraction of light by uniform-sized water droplets in thin clouds, such as altocumulus or altostratus. The angular size of the aureole is inversely proportional to the size of the cloud droplets.",
  "see_also": [
    "solar aureole"
  ],
  "url": "https://mlchart.com/terminology/meteorology/aureole/"
}