Rotation of galaxies Galaxy Zoo

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cw or acw? hst image of messier 101, pinwheel galaxy has in normal orientation , reversed.


one of original aims galaxy zoo explore way galaxies rotated. cosmologist kate land stated: people have argued galaxies rotating in agreement each other, not randomly d expect. want people classify galaxies according way re rotating , ll able go , see if there s bizarre going on. if there patterns re not expecting, turn surprises. in galaxy zoo 1, volunteers asked judge sdss images whether galaxies elliptical or spiral and, if spiral, whether rotating in clockwise or anti-clockwise direction. rotation, called chirality, of galaxies has been examined in several galaxy zoo related papers.


among results psychological bias demonstrated. galaxy zoo scientists had wanted check whether spiral galaxies evenly distributed or whether there intrinsic property of universe caused galaxies rotate 1 way or other. when science team came analyse results found excess of anti-clockwise spinning spiral galaxies. when team checked bias asking volunteers classify same image had been reversed, there still excess of anti-clockwise classifications. demonstrated human brain has real difficultly discerning between rotating clockwise or anti-clockwise. having measured effect team adjust it, , went on establish spirals near each other tended rotate in same direction.








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