All Courses

Earth Orbiting the Sun

Orbital Mechanics

Learn how gravity works, and how to escape it.

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Moon

Orbital Mechanics (Advanced)

Find out how real orbits work.

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CMB map

Cosmology

Learn about the Big Bang, and the expansion of the universe.

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Telescope

The Night Sky

Explore navigating in the night sky using constellations, finding deep-sky objects with a telescope.

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Sun

How Stars Shine

Learn about energy radiation and star colours.

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Vega

Measuring Star Brightness

Learn about star magnitude, parallax, and absolute magnitude.

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