Measuring the exact point of the beginning of a spin in a vacuum

Do you have an idea that doesn't fit any of the other challenges? This is the place for you, whether you want to design and develop an app, create a data visualization, hack on an Arduino... or anything else you can think of!

An object in space when allowed to be free begins to try to spin. Why? because environment in the universe is spinning as well. Measure this suddle action to gain insight on the velosity of the system it resides in.