A look at our scouts in the Solar System. Probes that trail-blaze on Mars, plunge into Jupiter and land on Saturn's moon Titan.

From the ancient sky-watchers of Babylon to space-age cosmology, the story of astronomy featuring Copernicus, Kepler, Galileo, Newton and Hubble.

Taking a look at celestial shows, how the solar wind conjures an aurora, lunar and solar eclipses explained and a recent eclipse of the Sun.

Exploring the threats of comets and asteroids and what would happen if the space rock that slew the dinosaurs hit New York today.

Visible light reveals only part of the Universe. We look at how other wavelengths fill out the picture, from gamma-rays to radio.

Is there life elsewhere in the Solar System? Could life be sustained on Jupiter's moon Europa or even Saturn's moon Titan in the future?

Our galaxy explored and light years explained. Looking at the life and death of stars, supernovae and the clouds where stars are born.

After astronauts fix its faulty optics, the Hubble Space Telescope peers back through time to the depths of the cosmos.

Looking at the structure of the Universe, galaxies, clusters, strands and how we measure to a nearby galaxy and to the farthest quasar.

The theory of the Big Bang explained and how from that cataclysmic explosion the Universe continues to expand, but will it stop and reverse?

Although invisible, black holes betray their presence, which is the same with dark matter: the missing 90% of the Universe.