Australian Aborigines were some of the first people in the world to develop ideas with astronomy. It is possible that their interpretation of astronomy is the oldest still alive today. Studying astronomical subjects – such as the Sun, Moon, stars and planets – and the way they appeared to move was used as a way to find and explain the relationship between people, nature and the sky. The ideas that came from this contributed to their basic perception of the universe (their cosmology), and still form an important part of traditional culture and knowledge. Many legends, art forms, music and ceremonies originate from interpretations of astronomical phenomena and objects in the sky. Many Aboriginal groups give spiritual or mythological meanings to these things. Some groups used their knowledge of the movement of objects across the sky to develop practical tools like calendars.

Old Australian Aboriginal culture is an oral tradition, so knowledge of astronomy has been passed down through stories, song and dance. A lot of knowledge is kept secret, only passed to those who have been initiated. As in all aspects of Aboriginal society, some things are only known to men, other things are only known to women. The earliest written account of Aboriginal astronomy was published in 1857. It was written by Edward Stanbridge, an Englishman who became friends with the Boorong people of Victoria.

Astronomy is a huge part of Aboriginal people's social, cultural and religious knowledge. It has little relation to the scientific theory of Western thinking. There are many different Aboriginal groups in Australia, and each interpret the sky in different ways. The interpretations all developed along the same lines and share the same basic themes, but can be very different in meaning. Most objects and phenomena are interpreted as figures or events in the Dreaming. Unlike in other ancient cultures, these legends and beliefs are still part of modern life for Australian Aborigines.