What is the rank 1 University in Australia?

I'm curious to know, what exactly is the top-ranked university in Australia? Is there a clear consensus among various ranking systems, or does it vary depending on the criteria used? Are there any notable achievements or distinctions that this particular university has made, which contribute to its esteemed position? And furthermore, how does this ranking compare to the universities of other countries, especially those considered to be at the forefront of academic excellence globally?