How do planets move? An introduction to orbital mechanics and the work of Johannes Kepler.
There is much more to light than meets the eye. Introduction to the electromagnetic spectrum and the science of spectroscopy.
Astronomy begins when we look up and start asking questions. Where are we? How big is the earth? This lesson is for all ages, start here!
How can we apply geometry and trigonometry in order to measure the size of the earth, moon and sun?
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