We measure the extremely long distances between things in space by light years. A light year is the distance that light travels in one Earth year. Light travels at about 300,000 kilometres per second.

A giant gas planet comparable in size to Saturn exists around a small red dwarf star. The discovery is beyond the scope of ...

Around seven asteroids or comets are thought to hit Saturn every year, but we have never spotted one in the act. Now, it ...

Centimeter-sized pebbles have been detected in protoplanetary discs using e‑MERLIN, filling in a critical phase of planet ...

News and research on the formation of galaxies. From the Milky Way to Andromeda Galaxy, see astronomy images of splendid galaxies in the universe. Read the latest research discoveries.