In an exoplanetary system, the planet Kepler-186f has an estimated diameter of 15 000 km15\,000\text{ km}15000 km.
The host star, Kepler-186, has a diameter that is 48 times greater than the diameter of Kepler-186f. Calculate the diameter of the star Kepler-186.
An inner rocky planet in the same system has a diameter that is 0.36 times the diameter of Kepler-186f. Calculate the diameter of this inner planet.
Practise AQA GCSE Physics Solar system; stability of orbital motions; satellites (physics only) with exam-style questions for Foundation and Higher tier. 27 questions covering Our solar system, The life cycle of a star, and Orbital motion, natural and artificial satellites, matched to the AQA GCSE Physics (8463) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.