How many advanced civilisations are in the Milky Way?
Stars change during their lifetimes.
Astronomers find a planet orbiting a star similar to the Sun.
A 19th century Irish astronomer builds the world's largest telescope.
Key discoveries have been made here.
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.