If the parallax of a star is measured to be 0.1 seconds of arc, its distance is
a) 10 astronomical units
b) 33 ly
c) 3.3 ly
d) 0.1 parsec
e) 1.0 parsec
Answer: b) 33 ly
If the parallax of a star is measured to be 0.1 seconds of arc, its distance is
a) 10 astronomical units
b) 33 ly
c) 3.3 ly
d) 0.1 parsec
e) 1.0 parsec
Answer: b) 33 ly