This introduction covers A Cosmic Address within Our Solar System for GCSE Physics. Revise Our Solar System in Space Physics for GCSE Physics with 14 exam-style questions and 12 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 1 of 8 in this topic. Use this introduction to connect the idea to the wider topic before moving on to questions and flashcards.
📖 A Cosmic Address
You live on a rock hurtling through space at 107,000 km/h around a nuclear fusion reactor we call the Sun. That Sun is just one of 200 BILLION stars in our galaxy, the Milky Way. And our galaxy is just one of 2 TRILLION galaxies in the observable universe. Yet despite this mind-boggling scale, we've mapped our cosmic neighbourhood in remarkable detail — from tiny Pluto to the giant gas planets, from rocky asteroids to icy comets.
Practice questions for Our Solar System
Which of the following is NOT an inner rocky planet in our solar system?
Explain how gravity keeps a planet in a circular orbit around the Sun.
Quick recall flashcards
What is a light year?
The distance light travels in one year = 9.46 × 10¹² km. It's a DISTANCE, not a time!
What is a dwarf planet?
A planet-like object that is too small to clear its orbital path. Examples: Pluto, Ceres, Eris