What is a light year?
Stars change during their lifetimes.
The Sun is one of countless stars in our galaxy.
Rubin finds evidence of invisible matter.
This famous telescope makes beautiful images of the Universe.
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.