A variety of celebrations have been planned to coincide with the upcoming total solar eclipse. There is a marathon in Cairns; there are various tours, cruise ships and all manner of other events.
With totality commencing over Arnhem Land at around 6:15am local time (in conjunction with sun rise), the eclipse path crosses the northernmost parts of Northern Territory and the Gulf of Carpentaria before traversing a line between the mouth of the Mitchell River and Cairns and then crossing almost all the way across the Pacific Ocean with totality ending a little west of the Chilean coast. A full map of the eclipse path is available here - just click on any part of the map to see details at that point.
Here in Melbourne, we will see a maximum of 42% of the sun's surface covered at about 8:06am; Sydney will experience a peak of 59% a few minutes earlier.
WARNING. Never look at the sun with the naked eye. Use welders' goggles (rated 12 or higher) or preferably a small telescope/binoculars to project the image onto a piece of cardboard. Further details on safe viewing may be found here or here.