Aim: To explore the scale of objects in the universe, from a human to the observable universe.
| Comparison | Factor | Context |
|---|---|---|
| Human → Earth | × 7 million | Earth's diameter is about 7 million times a person's height |
| Earth → Sun | × 109 | You could line up 109 Earths across the Sun's diameter |
| Sun → Solar System | × 6,400 | The Solar System (to Neptune) is ~6,400 times the Sun's diameter |
| Solar System → Milky Way | × 6.3 billion | Our galaxy contains 100–400 billion stars spread across 100,000 light-years |
| Milky Way → Observable Universe | × 930,000 | The observable universe is 93 billion light-years across and contains ~2 trillion galaxies |