An exercise where things are kept to scale. The Sun.

A 3 mm Sun (bulb), a distance of 32.4 cm, and a 27 micrometer diameter Planet Earth. That’s equivalent to…..
A 32.7 m diameter Sun, a distance of 3.5 km, from a 30 cm diameter Earth. And that’s equivalent to…
A 1,390,000 km diameter Sun, a distance of 150,000,000 km, and a 12,742 km diameter Earth.