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Discovering the Universe

Physics & Astronomy

Quiz 12 :

Characterizing Stars

Quiz 12 :

Characterizing Stars

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Which of these statements can be used to define stellar parallax?
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Answer:

B

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As a person drives along a road, trees in the middle distance seem to shift in position relative to faraway hills. What name is given to this phenomenon?
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Answer:

A

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The motion that is used to change the position of the observer in the most common parallax measurements of distances to relatively nearby stars is the
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Answer:

C

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Aristotle (fourth century B.C.) rejected the idea that Earth moves because he knew stellar parallax motion would result, and he was unable to measure any. About how long after Aristotle was stellar parallax actually measured?
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The Sun is about 8000 parsecs from the center of the Milky Way Galaxy, while the Hipparcos satellite measured parallaxes to an accuracy of about 0.01 arcseconds. How far toward the galactic center could astronomers see with Hipparcos (ignoring galactic dust and other obstacles)?
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Which of these properties of a nearby star is determined by a measurement of stellar parallax?
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The first accurate measurement of stellar parallax was made in
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Which of these statements BEST characterizes the human study of stellar evolution?
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How can astronomers tell that some stars are relatively close to Earth?
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The MOST accurate stellar parallax measurements for distances to the majority of stars in Earth's neighborhood in the universe have been made by
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Who was the first person to measure the parallax of a star successfully?
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What is parallax?
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How far away is the nearest star beyond the Sun?
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The MOST straightforward way to determine the distance to a nearby star involves the measurement of the
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Stellar parallax appears because
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In what fundamental way do humans (and many other animals) utilize parallax for the measurement of distance?
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Parallax of a nearby star is used to estimate its
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Stellar parallax is the
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How far away is the nearest star beyond the Sun, in parsecs?
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How many stars (other than the Sun) have an angle of parallax greater than 1 second of arc?
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