Bbc The Sky at Night: 700 Not Out (2011)

The British weather is often the enemy of stargazers up and down the country. A forecast of a couple of hours of cloud cover will disappoint even the most determined amateur astronomers.

Looking back on the major stories of the year - from the New Horizons mission to the most distant world we have ever visited to the release of the first-ever picture of a black hole. The team relive the highlights and uncover the latest developments.

The Sky at Night team explores the threat of an asteroid impact on earth. Around 2,300 asteroids have been identified as ‘potentially hazardous', and it's thought that a million ‘near-earth objects' are yet to be accounted for.

The team travel to the island of La Palma in the Canary Islands where they take control of some of the world's largest telescopes to view the most spectacular sights in the night sky.

The Sky at Night looks back at the last ten years of astronomy and ponders the most significant milestones and revelations. With the help of six distinguished astronomers, Chris and Maggie consider the state of astronomy in 2020 and wonder what new, exciting discoveries await us across the rest of the decade, as a host of new ground and space telescopes come online. Astronomer Royal Lord Martin Rees is among the guests to walk along the Astronomical Wall of Discovery in this one-hour special.

This month, The Sky at Night teams up with BBC Ideas to discover the secrets of archaeology and astronomy and to reflect on our ancestral skies.

All good travel guides need a map, and the team unveil the most detailed 3D map of the Milky Way ever produced. A map that reveals that there may be 50 per cent more stars in the galaxy than we previously thought. American astronomer Neil deGrasse Tyson gives us a guided tour of the strangest stars we have ever observed, and we discover that the Milky Way may already be colliding with our neighbouring galaxy, Andromeda.

The Sky at Night is embarking on a journey into the future as we explore how space will revolutionise life on Earth over the next 50 years. As humanity's reach extends into the cosmos, we face unprecedented challenges, from redefining what it means to be an astronaut to confronting our own space junk and dealing with the impact of life in space on our Earth-adapted bodies. With privileged early access to a groundbreaking new report from the Royal Society on humanity's future in space, the Sky at Night team are on a mission to find our destiny among the stars – our place in space.

The Sky at Night team investigates the controversial world of alien communication. The search for life on other planets is one of the most fascinating subjects in science. But what is less reported is the work being done around the world to determine what happens next. If we discover aliens, how would we contact them, what should we say and should we communicate with them at all?

This month, The Sky at Night has a spooky twist. Across the universe, there are hidden objects that we can’t see, but astronomers and scientists still believe they’re out there. To find out how we know that these mysterious objects exist, the team are going ghost-hunting. Cosmic ghost-hunting.