What is a light year?
Gravity gathers stars, gas, dust and dark matter.
Astronomers find a star that exploded in the year 1054.
An American astronomer works to popularise science.
This powerful telescope is located in Chile.
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.