Question

find the relationship between 1 light year and parsec (physics)

Answer 1

1 AU (Astronomical unit) = 1.496×10^11 m

1ly (LIGHT YEAR) = 9.46×10^15 m

1pc(PARSEC)= 3.086×10^16 m

relationship between AU and ly :
1ly = (9.46×10^15)/(1.496×10^11)
1 ly = 63235 AU

relationship between AU and pc :
1pc = (3.086×10^16)/(1.496×10^11)
1pc = 206265 AU

THEREFORE,
1pc = 206265 / 63235
1pc = 3.261 ly

1ly = 0.307 pc