This cache is located on campus at the Australian National University. Though it can be tricky to get a carpark during business hours, on the weekend there is lots of opportunity to grab this cache and have a walk to enjoy the beautiful campus grounds.
The cache is placed outside of the Centre for Gravitational Waves where in 2016 they announced the detection of gravitational waves. Predicted in 1916 by Albert Einstein on the basis of his theory of general relativity, gravitational waves transport energy as gravitational radiation, a form of radiant energy similar to electromagnetic radiation. The gravitational waves were emitted by the inspiral merger of two black holes, each of which contained the mass of around 30 suns. Occurring 1.3 billion years ago, this was the most violent explosion ever recorded by humankind. The ANU Centre played an important role in confirming Einstein's theory.
To the SSE of gz you will spot an old gum tree located in the courtyard. On closer inspection of this tree you will find that the tree has been saved by pouring concrete into the base of the tree to help support its weight. This procedure was carried out many years ago and the tree has nearly grown over the opening. The procedure was conducted as an experiment to see if it could help save many of the old gum trees located on campus. This tree is the only one that actually had this procedure done to it.
Please be mindful of muggles in this area during business hours and report any problems.
