1: Can't really take this type of photo at sunset.
2: need to use a tripod
3: panorama needs to match on both sides (or use a decent 360° one)
4: I've thought of using another nice finishing touch. (I didn't do it to this one, but I'll use it on my next one:
Once all the pictures of the 360 degree panorama are taken, as usual, take another picture looking straight down. of the ground below where the tripod was, trying not to get any shadow in it.
Once you've done that, then use the "sperize" option in Photoshop on it and then place it in the middle of the mini planet to get a nice finished look, instead of the stretched pixel lines that normally appear at the middle.
Naturally, you'll need to position it properly and then blend it at the edges to get it to look good. (and get the settings in the spherize correct).
Maybe I'll post a how-to, next time I do one of these.