Multiple Choice
If the Hipparcos satellite measures the parallax motion of a star against the background stars and concludes that the star has a parallax of 0.004 arcsec,how far is that star from Earth?
A) 250 pc or 800 ly
B) 0.004 pc or 0.013 ly
C) 25 pc or 81 ly
D) 400 pc or 1300 ly
Correct Answer:
Verified
Correct Answer:
Verified
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