A mysterious process speeds up the Universe's expansion.
Traces of the early Universe are found.
In 1987 astronomers observed an exploding star near our galaxy.
Hoyle puts forward an alternative to the Big Bang.
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.