more accurate to say is a logarithmic map of the universe relative to earth.
btw: 1.what does parsecs stand for?
2. what units does the horizontal axis stand for? (time?).
A parsec is a commonly used unit of distance in astronomy:
It doesn't say what the units at he bottom are but it looks like they've divided the Earth's circumfenrce into 24 hours. (i.e. 24 hours = 360 degrees).
Separate names with a comma.