"plasma squared circle" by limowreck666

Sphere: A three-dimensional surface, all points of which are equidistant from a fixed point. Or, to simplify the definition, a ball shaped thingie. If you happen to be in space today, a shot of the Earth would be pretty spectacular! Otherwise, see what you can find in the shape of a sphere. Don’t forget to add the tag “2009challenge81” to today’s shot!

"Perfect Blue" by Iain Alexander

Once you’re ready to submit your work to Flickr, you’ve got to do two important things. First, make sure you tag your photos correctly; “2009challenge″ and “2009challenge81”. Also, if you haven’t already, join the PhotoChallenge group on Flickr. Then, submit each day’s photo to the group’s pool.

"spheres" by susanne anette

To see all of today’s challenge photos, you can use this link: https://www.flickr.com/search/?ss=2&w=all&q=2009Challenge81&m=tags