Patrick talks to Mike A'Hearn, the NASA scientist behind the Deep Impact mission.
A look at Hawaii's Mauna Kea observatories; Chris looks at the telescopes, while Patrick talks to British scientists who use them.
Patrick Moore presents a guide to the most familiar body in the night sky, whilst Chris Lintott gives tips on how to observe the moon.
Tips on finding Saturn; Patrick talks to Prof John Zarnecki about the latest from the Cassini mission.
Patrick Moore offers advice on how to observe the sun and its many brilliant features. Chris Lintott demonstrates how to split light into a spectrum.
On 29 March, a total eclipse of the Sun passes over Antalya in Turkey. Patrick hopes for a glimpse of the partial eclipse to be seen from the UK.
How galaxies are formed.
Discussing gamma-rays that the spacecraft Swift has shown are far more varied than at first thought. Chris Lintott also tracks down the supernovae hunters.
Uranus and Neptune, which four billion years ago were much closer to the Sun, regularly swap orbits. Chris lintott takes a closer look at Jupiter.
UK scientists hope to find Martian life with the innovative 'life marker chip'; Chris lintott goes in search of the rover that will climb Martian mountains.
SMART-1 project scientist Bernard Foing on the spacecraft's pioneering technology; Chris looks at the STEREO and Solar-B missions to the Sun.
What to look for over the next few months; Lucie Green visits the Autumn Equinox star party at Kelling Heath; Chris talks to cosmologist Jim Gunn.
The latest findings of Venus Express, currently scrutinising Earth's 'evil twin' Venus, known for its searing temperatures.
Patrick finds out how scientists are making sounds and music from the changes within stars. Chris Lintott looks at variable stars.