The Parsec Is Defined So That a Star at a Distance

question 23

Multiple Choice

The parsec is defined so that a star at a distance of 1 parsec has a parallax of one arcsecond. If a star is located at a distance of 40 parsecs, what is its parallax?

• A) 0.25 arcseconds
• B) 0.025 arcseconds
• C) 0.04 arcseconds
• D) 0.05 arcseconds

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Definitions:

Parameter

A numerical characteristic that describes a statistical population, such as a mean or standard deviation.

Mode

The value that appears most frequently in a data set, representing the highest peak in a distribution.

Hypothesis

A proposed explanation for a phenomenon, set forth as a starting point for further investigation through experimentation or observation.

Central Tendency

A statistical measure that identifies a single value as representative of the middle of a dataset, often the mean, median, or mode.