Jon Snow narrates this series documenting the marvels of the cosmos. 'Hub of the Planets' focuses on the sun, Mercury and Venus. 'Earthspace' covers the Earth, the Moon and such celestial phenomena as aurorae and eclipses. In 'Mars, Life and Impacts' the question of whether other life exists in the universe is examined, along with the threats posed by comets and asteroids. 'Outer Planets' looks at Jupiter, Saturn, Uranus, Neptune and the realm of the comets. 'Man in Space' charts the history of human space exploration and the demands of living and working in space. 'Pioneers' pays tribute to the astronomers of the past who opened our eyes to galactic possibilities. 'Cosmic Focus' looks at the means by which we observe the universe around us. Finally 'Deep Space' examines theories regarding the Big Bang and the infinity of space.