wunder beta

📘 How a sundog forms

Follow ice-crystal shape, refraction, solar angle, and halo geometry to explain sundogs.

lessons

~10 min

to learn

🔬 Science

subject

Adults

level

Start the course →

What you’ll learn

Ice clouds
Refraction
Orientation
Solar elevation
Halo family
Color order
Cloud height
Observer geometry
Weather clue
Light path

Questions this course answers

What makes a sundog?

Parhelia form from refracted sunlight in ice crystals.

Why do sundogs appear near 22 degrees from the Sun?

The crystal side-face path produces that characteristic angle.

Why are low Sun angles favorable?

Sundogs usually remain near the Sun's elevation and are most apparent when it is low.

What controls whether a halo or spot appears?

Different crystal populations create different ray paths.

Does a sundog guarantee rain?

The optical display is not a complete weather forecast.

Grounded in trusted sources

[object Object]
[object Object]
[object Object]
[object Object]
[object Object]

Every Wunder lesson is built from real, reputable sources — never invented.

Related Science courses

📘How a rainbow appears 📘How a mirage bends a horizon 📘How polar stratospheric clouds glow 📘How the ozone layer absorbs ultraviolet 📘How greenhouse gases warm air 📘How carbon dioxide dissolves in seawater 📘How ocean currents move heat 📘How an upwelling zone feeds fish

Wunder is a personalized learn-anything platform — tell it any topic and it builds a beautiful, fact-checked course in minutes, with narration, a knowledge check, and a college-style University track.

Browse more Science courses · All topics · Home