Space Physics

Space Physics moves from the Solar System to stars, galaxies and the expanding Universe. The topic contains a mixture of scale, gravity, sequence and evidence, with additional numerical work for Extended candidates.

A sensible learning order

Begin with the Solar System and gravitational orbits. Then study the Sun, stars, galaxies and light-years before moving to stellar evolution. Finish with redshift, expansion, the Big Bang, cosmic microwave background radiation and Hubble calculations.

What usually causes difficulty

Students can mix Core astronomy foundations with Supplement-only detail. Large distances and standard form also create avoidable arithmetic errors. In written answers, evidence for expansion must be separated from the explanation of the Big Bang model.

Use scale comparisons and ordered sequences. For calculations, write every power of ten and unit. For evidence questions, state the observation first, then what it supports.

Core and Supplement

Basic stars, galaxies, redshift and expansion include Core requirements. Detailed stellar evolution, cosmic microwave background radiation and Hubble-law work include Supplement requirements. The lesson pages label those sections directly.

Use the Maths for Physics guide for standard form and the topic question bank for a balanced set of recall, sequence and calculation questions.