Comets and asteroids are the rubble left over from the formation of the solar system. Their huge, highly elliptical orbits can easily be perturbed.

1. Bodies of Rock and Ice

Factual

Documentary

New discoveries and breakthrough technologies are changing the way we see our place in the universe.

Galaxy

Series 1

Galaxy presents a cross section of recent developments that we need to understand.

Nobody's Fool

New quiz with a big twist: it's not what you know, but what your rivals think.

A game where it's not just about how smart you are, but how smart others think you are. Players must eliminate the worst performing player or they will lose half the prize pot.

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Since the earliest days of planetary exploration, our neighbouring planet Mars has had scientists wondering if it may once have fostered life.

2. Perseverance

When the US space shuttle was withdrawn from service, America relied upon the Russian Soyuz spacecraft to deliver its astronauts to the International Space Station.

3. Space Transport

The Apollo programme was said to have made America the winner of the Space Race but since the last moon landing in 1972, no human has set foot upon the lunar surface.

4. Artemis Visit To The Moon

The James Webb Space Telescope is the most sophisticated observatory that humanity has built.

5. JWST

A rocket uses brute force to lift a satellite through the atmosphere yet it must be controlled with exquisite accuracy to deliver its payload to its precise position at the exact time so that it can function as desired from a unique orbit.

6. Orbit

Once regarded as only a theoretical consequence of general relativity, black holes or singularities are thought to be at the heart of every galaxy.