Thank goodness for that.
The issue wasn't really about the black bars, it was one of image stability. We found the image on a NASA website; it had been an image of the day. It has already moved once (because more images of the day have appeared with... er... each new day). What we really wanted (and wanted to be sure about) was that the image would persist here at the Chrons. And the only way that we could be sure - setting aside system crashes - was to have the "source" image saved here.
And now it is, in the Photo of the Day thread.