Astronomers observe a dwarf planet, designated DP-2026, in a stable, nearly circular orbit in the outer regions of the Solar System. The orbital radius of DP-2026 is measured to be 64 AU64\text{ AU}64 AU, where 1 AU1\text{ AU}1 AU is the mean Earth-Sun distance.
What is the approximate orbital period of DP-2026 around the Sun, in Earth years?
16 years16\text{ years}16 years
64 years64\text{ years}64 years
512 years512\text{ years}512 years
4096 years4096\text{ years}4096 years
28 exam-style questions on Edexcel GCSE Physics 7.1 The Solar System and gravity, covering 7.1.1 Weight and g on different bodies in space, 7.1.2 The Solar System, 7.1.3 Changing ideas about the Solar System, 7.1.4 Orbits of moons, planets, comets and satellites, and 7.1.5 Gravity and orbital motion. Each one has a worked solution and a mark scheme showing where the marks go.