The dwarf planet Eris orbits the Sun with an orbital period of approximately 558 years558\text{ years}558 years. Assuming Eris has a circular orbit, what is the approximate orbital radius of Eris in astronomical units (AU\text{AU}AU)? (The orbital period of Earth is 1 year1\text{ year}1 year and its orbital radius is 1 AU1\text{ AU}1 AU).
8.2 AU8.2\text{ AU}8.2 AU
24 AU24\text{ AU}24 AU
68 AU68\text{ AU}68 AU
1.3×104 AU1.3 \times 10^4\text{ AU}1.3×104 AU
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.