[dogscoff]

I was also thinking: Assuming you take Ceres out of the coin so that you can have sunlight coming from overhead, and assuming that overhead sunlight is sufficient to live by, you could actually have two landmasses: Each one would be a ring around the coin's circumference, with a ring shaped ocean seperating them. At midday you could look stright up and see the far side of the coin as three stripes: Land, sea, land. The sun would be shining down on you through the distant sea. for people on the far side (midnight for them) it would be dark, unless they were on the water where they'd have bright sunlight shining up at them from underneath.

Strolling along the beach at midnight would be spectacular.