Australia's flag is also called the Commonwealth Blue Ensign. It has three main design elements on a deep blue background:

• The British Union Jack flag is in the upper left corner - noting Australia's ties to Great Britain
• The Southern Cross constellation (5 stars) is on the right side of the flag - the Southern Cross is a major navigational constellation in the Southern Hemisphere
• The large, white, seven-pointed Commonwealth Star (also called the Star of Federation) - it is symbolic of the original states of Australia.