You asked for an in dpeth comment on your shot in this challenge.
First off, I am not sure whether to say eww or wowwwwwww. This is an excellent image of making the imagination soar. It is a very powerful image. We know what it is, but our minds take over as to what it could be, what a powerful thing you have done to us all.
I think that taking the stem off would have given this a more abstract feeling. Abstracts are a weird thing really. Some people think they should just be a blurry odd unrecognized thing and then others think that you should be able to identify it.
I can see nothing that would improve this shot or any suggestions.
Abstracts are weird challenges. Usually my votes line up more or less with the overall palcement, but not this time. I gave this one an 8 and was surprised to see where it placed overall. Some very good photography scored very low in this challenge.