Back in February Nasa announced that Hubble had identified a ‘backwards’ spinning galaxy. Nasa claims that is is spinning clockwise. A few questions here.
Why is it so odd ?
Couldn’t we just be looking at it from the wrong perspective? (depending on your vantage point it MAY be spinning anti-clockwise)
It’s not so much that the galaxy appears to be spinning clockwise, it’s that the galaxy’s “arms” are moving foreward, instead of trailing behind the rotation as all other spiral galaxies appear to do.
Actually, only SOME of the spiral arms are pointing in the wrong directions. Others are lagging behind the direction of spin as you’d expect. Look here where you can see much finer details.
Look in the upper left 1/4 of the picture and you can see some smaller arms forming that are trailing behind a clockwise rotation (and therefore bridging the gaps between the more imposing arms). I’m no physicist, but I’d imagine that we’re actually looking at two galaxies merging / superimposed on each other, “vertically” from our perspective, spinning in opposite directions, one with considerably more prominent spiral arms than the other, and that they are starting to disrupt each other as they merge.