Is life out there?
Astronomers search for other 'Earths' orbiting distant stars.
The Seven Sisters star cluster has at least 1,000 stars.
An American astronomer measures the Universe's expansion.
Swift aims to discover more about gamma ray bursts.
Professor Brian Cox and other experts explain the mysteries of the Universe.
Sir Patrick Moore looks back on over 50 years of The Sky at Night.
Experts explain what you can see in the night sky during the autumn.
You can see interesting things in the night sky during the spring and summer.
Find out what you can see in the night sky during the winter months.