Melbourne is famed for having four seasons in one day, so it's only fitting that a 14m (diameter-wise) animated scale model of the sun should be suspended in the sky, controllable with an iPhone, iPad or iPod Touch.
It was created by artist Rafael Lozano-Hemmer for the Light in Winter festival in Melbourne. Beamed onto the helium-filled balloon sun with five projectors are NASA images showing actual sun effects such as turbulence, flares and spots; visible to the passersby beneath.
If you happen to be in Melbourne, it's on show at the Federation Square until July 4. Grab your portable Apple device, but just be careful you don't become another Icarus. [Switched]