Here's a breakdown:
* Parsec stands for "parallax second" and is a unit of distance used by astronomers.
* It's defined as the distance at which one astronomical unit (the average distance between the Earth and the Sun) subtends an angle of one arcsecond.
* This means that if you were to view a star from Earth and then from a point one astronomical unit away, the star would appear to shift by one arcsecond.
Let me know if you have any other questions!
