If your watch says 12:00 noon and you
are in New York, which is in the EST Time Zone, you need to set your watch back two
hours to 10:00 AM if you are traveling to Denver in the MST Zone.
I am pretty sure astronomers use the parsec (pc) for angular measurement.
Any condition characterized by cognitive and emotional disturbances, abnormal behaviors, impaired functioning, or any combination of these. Such disorders cannot be accounted for solely by environmental circumstances and may involve physiological, genetic, chemical, social, and other factors.
That’s the exact definition of a physchological disorder according to the APA