A red rainbow happens when the sun is low

What caused this red-only rainbow?, Rainbow

red rainbow

Draconid Meteor Shower: A Spectacular Celestial Event

Cầu vồng

A red rainbow happens when the sun is low

Cầu vồng

EarthSky Community Photos, EarthSky

I saw a cloud that looked like ocean waves. What is it?

A red rainbow happens when the sun is low

A red rainbow happens when the sun is low

A red rainbow happens when the sun is low

red rainbow