Einstein's gravity theory predicts warps in space-time.
Bursts of powerful radiation come from the distant Universe.
The Seven Sisters star cluster has at least 1,000 stars.
Rubin finds evidence of invisible matter.
Herschel is the largest telescope ever launched into space.
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.