TOPIC 25 · A LEVEL

Astronomy and cosmology

Use starlight as evidence—measuring luminosity, temperature, radius, distance, redshift and the expansion history of the Universe.

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TOPIC 25

Astronomy and cosmology

Use radiation from stars and galaxies to determine their properties, distances and the expansion of the Universe. The visuals link what telescopes measure to the physical properties inferred from those measurements.

25.1

Astronomy and cosmology

Use radiation from stars and galaxies to determine their properties, distances and the expansion of the Universe.

AVAILABLE

01Luminosity and radiant flux intensity→
02The inverse-square law→
03Standard candles and astronomical distances→
04Wien's displacement law and stellar temperature→
05The Stefan-Boltzmann law and stellar radius→
06Redshift and spectral lines→
07Hubble's law and the expanding Universe→
08The Big Bang model and cosmological calculations→

Interactive astronomy toolkit →Structured practice →

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8 lessons