SkyAxisSkyAxis - Store celestial axis information

Description:
The SkyAxis class is used to store information associated with a particular axis of a SkyFrameSkyFrame. It is used internally by the AST library and has no constructor function. You should encounter it only within textual output (e.g. from astWriteastWrite).
Constructor Function:
None.
Inheritance
The SkyAxis class inherits from the AxisAxis class.