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Students calculate the mass of dark matter in the solar system and compare that to the amount of dark energy present.

A drawing activity in which students visualise the elliptical orbits of the planets and, optionally, study their geometry using basic algebra.

Students use the Doppler formula to calculate the redshift of a distant galaxy and the size of the Universe when light first left the galaxy. Accompanies the video 'How big is the Universe?'.

In this practical activity students explore how momentum is conserved when two objects collide.

In this practical activity, students investigate magnetic materials, attraction and repulsion and make a magnetic compass. Accompanies the video ‘Seeing The Invisible’.

An activity to motivate or reinforce learning about the electromagnetic spectrum in which students compare and contrast views of the Sun and the Milky Way Galaxy in different wavelengths of light.

Celestia is a spaceflight simulator that allows you to explore real astronomical data as you fly through space.

In this classroom activity students use real data with the physics of forces and circular motion to calculate the altitude at which space begins.

Students calculate the Schwarzschild radius of a black hole with the same mass as the Earth and one with the mass of the Milky Way. Accompanies the video 'What's inside a black hole?'.