Scale of the Universe

One slider from a human being to the nearest star.

Explore the scale ladder — smallest to largest

Earth (diameter)

Object: 12,742 km

If Earth (12,742 km wide) were the size of a grape (2 cm), the Sun would be about 2.2 metres across — and Proxima Centauri would still be over 60,000 km away in the model. Space is mostly emptiness.

Model assumptions

Diameters/distances rounded for education.

Reference: NASA planetary data; Newtonian mechanics. This is an educational model, not an ephemeris.