Q. Why record the rotation of the galaxy when it depends on your position? A different observer on the other side of the galaxy would observe it rotating the opposite way. And shouldn't they all be random?That's a new one on me. How cool is that?
A. Yes, they should be, but a recent investigation involving 1600 galaxies suggested that the odds of seeing a clockwise or an anticlockwise galaxy changed depending on where you look in the sky. If this is true, it suggests we're missing something about how the Universe is organised on large scales, and so we decided - with your help - to see if the effect is real. We are also interested in the correlation of neighbouring galaxies, for example whether a close pair of galaxies rotate the same way, and all observers would agree on such an observation.