Uranometria
Uranometry concerns measuring and representing the sky. Uranometria is also the title of Johann Bayer’s star atlas published in 1603.
How it is defined
An atlas represents stars and constellations using graphic conventions and coordinates. It is neither a method of assigning personal destinies nor a chart dedicated to Uranus.
How to read it
To check the phenomenon, distinguish the calculated position, its reference time and what an observer can see from their location. These related details answer different questions.
A concrete example
In an old plate, distinguish the mythological figure from the points representing stars. Cultural imagery and mapped positions serve different purposes.
Explore further
Explore the sources and related concepts. When consulting tables or calendars, look for the date, coordinates and reference frame they use.