Here is an excerpt of orbital's announcement:

"Well I given this some thought, and I 'd like to go with a Space theme if thats ok. As it's the first time I've entered I'm not sure if that has been a recent theme, so if it needs changing Tresamie let me know.
So think planets, stars, spaceships, rockets, aliens etc.
Cheers
Joe"

It sounds fine to me, and I am sure it will be a fascinating subject.  I can't wait to see what you all will come up with! 

Let's run this until the 29th of June, I will give you a day or so heads up and if anyone needs more time they can let me know.  You may enter an existing work if you like, but we would prefer to see a new work created for this challenge... it IS a challenge after all!  You may enter more than one work, but remember that in the voting, each entry will be judged separately.  Please, please, please put titles on your entries, especially if you have more than one.

Let your creativity flow!!!

~Viv

Fractals will always amaze me!