Locals have often considered Melbourne to be the centre of the universe, now we can at least claim to be hosting it! Mexican born Rafael Lozano-Hemmer’s own bio describes his works as an “intersection between architecture and performance art” and Solar Equation at Fed Square is no exception. This work consists of a tethered helium filled balloon illuminated by an incredibly accurate rendering of the Sun’s surface. Impressive as that may be, this artwork comes complete with a downloadable app that enables you to control the activity on the surface of the balloon and even change its rendered skin; if you’ve got a touch screen you even get to put your hands all over it! To find out more or watch a video of it in action, visit Rafael Lozano-Hemmer’s website here.