Multiple Choice
If astronomers measure the parallax of a star against the background stars and conclude that the star has a parallax of 0.004 arcsec, how far is the star from Earth?
A) 25 pc or 81.5 ly
B) 250 pc or 815 ly
C) 400 pc or 1300 ly
D) 0.004 pc or 0.013 ly
Correct Answer:
Verified
Correct Answer:
Verified
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