Nuome is a closely Earthlike planet . . .
Until you get to the sort of physics that involves our magic
It has one big continent, with a super-Himalayan range down one side (the east), polar ice caps rather larger than Earth, an axial tilt slightly less than Earth's, and the usual range of minerals, life-forms etc.
Astronomy - also Earthlike but no constellations recognisable. Any astronomer could look at
the sky and feel very familiar with the general appearance - until he looked for the familiar
constellations and said "Oops! Where am I?!"
And if he looked long enough he might notice the stars making their usual slow progress across
the sky - all except one, known as The Western Star or occasionally The MotherStar. That is
fixed in position, and never moves - well, not to naked-eye observation - though every night
it does go out for a while, regular as clockwork . . .
The map below shows Nuome on a VERY broad scale. More detailed maps appear elsewhere.