Optical Phenomena
- Optical phenomenon
- Afterglow
- Airglow
- Alexander's band
- Alpenglow
- Anticrepuscular rays
- Aurora (astronomy)
- Belt of Venus
- Blue moon
- Circumzenithal arc
- Crepuscular rays
- Earthquake light
- Lightning
- Upper-atmospheric lightning
- Glory (optical phenomenon)
- Green flash
- Halo (optical phenomenon)
- Sun dog
- Heiligenschein
- Opposition effect
- Cloud iridescence
- Light pillar
- Rainbow
- Mirage
- Fata Morgana (mirage)
- Sprite (lightning)
- Tyndall effect
- Gegenschein
- Iridescence
- Sylvanshine
- Zodiacal light
- Caustic (optics)
- Synchrotron radiation
- Moon illusion
- Hessdalen light
- Min Min light
- Will-o'-the-wisp
- Naga fireballs
- St. Elmo's fire
- 22° halo
- 46° halo
- Brocken spectre
- Circumhorizontal arc
- Diffuse sky radiation
- Fog bow
- Irisation
- Mirage of astronomical objects
- Moonbow
- Noctilucent cloud
- Parhelic circle
- Parry arc
- Meteoroid
- Comet