In Space:
The Sky at Night
Presenter Sir Patrick Moore has been your star guide since 1957. Upcoming programme details
Twinkle twinkle
It takes 4.3 years for light from the star Alpha Centauri to reach Earth. Find out why it twinkles when it gets here.
Mars travel guide
The volcano Olympus Mons towers 17 miles above the Red Planet's surface. Also: The latest news from Mars
Mission timeline
On This Day remembers the highs and lows of space exploration with articles, images and video.
Prehistory Explore our prehistory section for dinosaurs and other prehistoric life.