Gravity on Earth, Jupiter and Pluto

The different effects of gravity on Earth compared to Jupiter or Pluto.

How do we know the Earth is spherical?

The evidence for the Earth being round or spherical using Aristotle's reasoning.

How do we know the Earth is spherical? (signed)

A look at the evidence for the Earth being round or spherical.

Sun, shadows and time of day

How you can tell the time of day from shadows cast by the sun.

The Moon

Images of the Moon and historical news footage of the first Moon landing.

The Moon and its orbit around Earth

Why and how the shape of the Moon appears to change when seen from the Earth.

The planet Jupiter

A quick guide to Jupiter, the largest planet in our solar system.

The planet Neptune

A quick guide to the planet Neptune, which is composed mainly of water.

The planet Uranus

A quick guide to the planet Uranus, the seventh planet from the sun.

The planet Venus

A quick guide to Venus, the brightest planet in the sky.

16 learner guides

We have a selection of learner guides