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Astronomy The Solar System

Physics & Astronomy

Quiz 13 :

Taking the Measure of Stars

Quiz 13 :

Taking the Measure of Stars

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Two main-sequence stars have the same temperature.If star A is four times more luminous than star B, then
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A

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A parsec is a measure of
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C

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Parallax is used to measure a star's
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A

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What is the difference between apparent brightness and luminosity?
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Star A and star B appear equally bright, but star A is twice as far away from us as star B. Which of the following is true?
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If a star's measured parallax is 0.2 arcsec, what is its distance?
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You observe two stars in a visual binary system using a blue filter that is centered at a wavelength of 550 nm and a red filter that is centered at a wavelength of 650 nm.Star A has a temperature of 10,000 K, while star B has a temperature of 4000 K, and you know that both stars are the same size.Which star will be brighter in each filter?
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Star A is a red star.Star B is a blue star.You are able to determine that both stars are the same size.Which star appears brighter in your sky?
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How many arcseconds are there in 1 degree?
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What advantage do you gain by having two eyes that are separated on your face, rather than being very close together?
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Star A and star B both have the same temperature but different sizes and distances.Star A is more luminous than star B, but star B appears brighter than star A in our sky.Which of these statements about the absolute and apparent magnitudes of the two stars is correct?
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What relationship exists between a star's distance and its parallax?
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To measure the most accurate parallax possible from Earth's surface, we would make two measurements of a star's position on the sky separated by
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The star named Capella has an apparent magnitude of 0, while the star named Polaris has an apparent magnitude of 2.This means that Capella appears ________ in our sky than Polaris.
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Star A is a red star.Star B is a blue star.Which star is hotter?
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If a star's distance is 10 pc, what is its parallax?
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The absolute magnitude of a star is a measure of its
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If one star appears brighter than another in the night sky, then the brighter star
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The Hipparcos satellite was capable of measuring parallaxes to ________ stars.
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Star A is a red star.Star B is a blue star.You are able to determine that both stars are the same size.Which star is more luminous?
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