Here's a little sneak peak of some of the ideas we're playing around with for the GI2012 show we've designed for the Arches.
The above is a diagram which tries to expain the concept that should the sun explode it would take around 8.5 minutes before we noticed any change (due to the speed of light) but the actual physical effects of the explosion reaching us would take around 18 months.
This complicated little diagram is looking at the slingshot affect on time by gravity.
They make my head hurt a little and I drew them!! But they got pretty colours.