Idavoll

After Ragnarok and the collapse of Yggdrasil, the nine realms smashed into each other creating multiple planes and 3 planets. Idavoll is the main world with two moon planets. The first and more notable blue moon is another planet that is said to be Vanir which was far enough away from the collapse to be pulled all the way into Midgard. The other is the Aesir, which looks generally the same as the old moon however it is said parts of the nine realms ended up there.