I was taking a few quick looks through my telescope but the air was slightly foggy and the only thing clearly visible was the Moon. The Moon, a telescope and a bored N900 in the inner pocket, you say ? I though I might take a few snaps of with the N900. I was quite pleasantly surprised by the results (yes, the internal postprocessing/jpeg artifacting is visible, but hey !).

The N900 was set to ISO 100 and -2 exposure compensation
The photographs were made handheld, with me holding the N900 and pressing the shutter, no timer or fixture were used.
The only postprocessing was the 1:1 crop and altered levels, NO denoising, NO rescaling, NO per pixel manipulation, NO color correction, etc. As said, the atmospheric conditions were terrible (2-3/10), slightly foggy, strong moonshine.

With image stacking, a proper fixture and hopefully a slightly improved/more permissive camera firmware this thing could do wonders.