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Natural Sciences · Intermediate

Astronomy & Cosmology

Grasp the staggering scale of space, explain the Moon's phases and the seasons, read a star's temperature from its colour, measure the distances to stars, map them on the H–R diagram, follow stars from birth to death, and trace the expanding universe back to the Big Bang.

7 lessons~40 min0/7 complete
1

Our Corner of Space

Distances, seasons and the Moon.

  1. The Scale of SpaceLight-years and looking back in time
  2. Phases & SeasonsGeometry in the sky
2

Stars

How they shine, and how they die.

  1. StarlightBrightness and colour
  2. Lives of StarsFusion, giants and remnants
3

Measuring the Stars

Distances, sizes and the H–R diagram.

  1. The Distance LadderParallax and standard candles
  2. The H–R DiagramMapping every kind of star
4

The Universe

Expansion and the Big Bang.

  1. The Expanding UniverseHubble and the Big Bang

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