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Patrick Moore focuses on the planets Uranus, Neptune and Pluto, identifying points of interests about these remote members of the solar system.

A look back at a special programme marking the 25th anniversary of The Sky at Night. Patrick Moore reports on what is happening at great observatories all over the world.

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July 4th 2005 a small copper impactor from the NASA Deep Impact spacecraft was released in the path of Comet Tempel 1, causing a collision that released fresh ice and dust, allowing astronomers for the first time to study pristine material from the formation of our solar system. Sir Patrick Moore is joined by leading comet experts who describe the science and importance of this historic achievement. While co-host Chris Lintott interviews British astronomer Richard Ellis at Palomar Mountain, California who is in charge of the observatory where professional astronomers using the historic Hale 200-inch telescope, and a team of amateur astronomers including Scott Roberts, Tony Cook, Russ and Stephanie Tanton, Dan Dickerson, John Downs, Mike West, and others who visually and photographically witnessed the actual point of impact.

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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.