Historically, early astronomers believed that the planets in our Solar System moved in perfect circles.
We now know that their orbits are actually elliptical (oval).
State one other belief or idea about the planets or objects in our Solar System that has changed over time due to new scientific evidence.
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.