Space Physics

Worked examples (12)extended set

• 1Why the Sun crosses the sky
• 2Seasons from a tilted axis
• 3Defining and using average orbital speed
• 4Show that an orbital period is about 84 Earth years
• 5A satellite orbit: remember the Earth's radius
• 6Interpreting a table of planetary data
• 7Radio signals to a rover on Mars
• 8Field strength and orbital speed
• 9Speeding up near the Sun
• 10Reading a field-strength graph
• 11Radius of an orbit, then a radar echo
• 12Energy changes around a comet's orbit

Model answers (6)

• ✓Model answer — Paper 2/4 short-answer style
• ✓Model answer — Paper 2/4 style
• ✓Model answer — Paper 4 explanation style
• ✓Model answer — Paper 4 structured style
• ✓Model answer — Paper 4 extended-explanation style
• ✓Model answer — Paper 4 data-analysis style

Worked examples (12)extended set

• 1What kind of star is the Sun?
• 2Light-years as a distance
• 3Completing the life cycle of stars
• 4What keeps a star stable?
• 5Describing redshift from spectra
• 6Cosmic microwave background radiation
• 7The Hubble constant from a best-fit line
• 8How far away is a receding galaxy?
• 9Two measurements, one Hubble constant
• 10Where do the heavy elements come from?
• 11The age of the Universe from d/v
• 12Analysing galaxy data with an anomaly

Model answers (6)

• ✓Model answer — Paper 2/4 short-answer style
• ✓Model answer — Paper 2/4 style
• ✓Model answer — Paper 4 structured style
• ✓Model answer — Paper 4 structured style
• ✓Model answer — Paper 4 extended-explanation style
• ✓Model answer — Paper 4 extended-response style