If Astronomers Measure the Parallax of a Star Against the Background

question 155

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

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Definitions:

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The process by which humans gain the capacity to perceive, produce, and use words to understand and communicate.