A not-all-together sane way of showing a class how retrograde motion works!
WATCH VIDEO
Here's how to show your students why stars twinkle in the night sky!
Watch Video:
Using a laser and some boiling water,
you can show why planets do not appear to twinkle in the night sky.
Watch Video:
This demonstration shows how atmospheric scattering filters
the colour of the sun during a sunset.
Watch Video:
Read more: Why Are Sunsets Red?
A podcast that reviews the
Voyager Golden Record!
