The sky isn't just blue – airglow makes it green, yellow and red too
- Written by: Michael J. I. Brown, Associate Professor in Astronomy, Monash University
NASALook up on a clear sunny day and you will see a blue sky. But is this the true colour of the sky? Or is it the only colour of the sky?
The answers are a little complicated, but they involve the nature of light, atoms and molecules and some quirky parts of Earth’s atmosphere. And big lasers too – for science!
Blue skies?
So first...
Read more: The sky isn't just blue – airglow makes it green, yellow and red too