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0.01 to 100 solar radii
Compared to the size of the Sun, between what range of sizes are most stars found?
two golf balls separated by 100 kilometers
Which of the following best describes the size and distance relationship of our Sun and the nearest star?
less massive and approaching us at this moment
In a spectroscopic binary system, the star showing the larger blue shift is
What is the single most important characteristic in determining the course of a star's evolution?
luminosity and surface temperature
What are the two most important intrinsic properties used to classify stars:
Star B is hotter than star A
Star A is a main sequence star of spectral type F2 and star B is a white dwarf of spectral type B4. Which statement is correct?
Deneb appears 2.5 times brighter to us than does Polaris
In comparing first magnitude Deneb with second magnitude Polaris, we find that:
Having nothing to do with trigonometry, ____ parallaxes use the width of absorption lines to estimate the star's luminosity and size and distance.
If a star is found by spectroscopic observations to be about 500 parsecs distant, its parallax is
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