The sky looks blue on a sunny day. But at night, ... It is a glow-in-the-dark night sky too, colored a mix of green, yellow, and red. Its colors result from scattered sunlight, oxygen, ...

The sky looks blue on a sunny day ... The sky isn’t just blue – airglow makes it green, yellow and red too Published: December 29, 2022 3:56pm EST. Michael J. I. Brown, ...