Astronomy & spaceflight

Astronomy & spaceflight

From the night sky to missions to Mars: the universe, step by step.

Topics build on each other, but feel free to explore anywhere.

The night sky

6 topics · 58 exercises

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1Reading the sky10 exercises 2Constellations10 exercises 3Our Moon10 exercises 4Planets in the sky10 exercises 5Telescopes10 exercises 6Meteor showers8 exercises

Our solar system

5 topics · 50 exercises

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1The Sun10 exercises 2The rocky planets10 exercises 3The gas giants10 exercises 4Asteroids & comets10 exercises 5Cosmic distances10 exercises

Stars & galaxies

6 topics · 58 exercises

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1Lives of stars10 exercises 2Supernovae & black holes10 exercises 3The Milky Way10 exercises 4Galaxies10 exercises 5Big Bang & expansion10 exercises 6Exoplanets8 exercises

Spaceflight

5 topics · 50 exercises

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1Rockets10 exercises 2Satellites10 exercises 3Living in space10 exercises 4Probes & rovers10 exercises 5To the Moon and Mars10 exercises