In an exoplanetary system, the gas giant planet Aegir-b has an estimated diameter of 18 500 km18\,500\text{ km}18500 km.
The host star, Aegir, has a diameter that is 828282 times greater than the diameter of Aegir-b. Calculate the diameter of the star Aegir in meters. Give your answer in scientific notation to an appropriate number of significant figures.
An inner dwarf planet in the same system has a diameter that is 0.240.240.24 times the diameter of Aegir-b. Calculate the diameter of this inner dwarf planet in meters. Give your answer in scientific notation to an appropriate number of significant figures.
19 exam-style questions on AQA GCSE Physics 8.1 Solar system; stability of orbital motions; satellites, covering 8.1.1 Our solar system, 8.1.2 The life cycle of a star, and 8.1.3 Orbital motion, natural and artificial satellites. Each one has a worked solution and a mark scheme showing where the marks go.