Posted by Art on October 01, 1997 at 08:43:23:
In Reply to: Re: Astro 3 posted by Pretesh Dahya on September 30, 1997 at 16:23:22:
In briefest terms, a parsec is a measure of distance, 3.3 lt-yrs.
An arcsec is a measure of angle, 1/3600 of a degree.
A parsec is defined in terms of an arcsec, namely the distance at which one AU subtends one arcsec.
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