Mapping the Celestial Sphere
The GroundThe Dome of the Sky
A View to the South
The Southern Sky
The Whole Sky
Opening the Sphere
Stretching it FlatAn Equatorial Map
We could draw a map of the whole sky on the inside surface of a sphere. To map the sky on a flat sheet is equivalent to opening up a spherical map and stretching it flat.
To create a galactic map, we would slit the sphere from the galactic north pole to the galactic south pole, along the 180 degree line of galactic latitude.
