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The measure of energy output from a star per second is referred to as its luminosity. Luminosity is typically expressed in watts (W) or in terms of the Sun's luminosity, denoted as L☉. This value quantifies the total amount of energy radiated by the star across all wavelengths in a given time period, reflecting its intrinsic brightness.
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Earn +20 ptsQ: What is the measure of energy output from a star per second?
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What is energy output from the surface of a star per second?
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How many arc seconds away is Vega?
An arc second is a measure of angular separation, not of distance. It is therefore an inappropriate unit for measuring the distance to a star.
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The device that astronomers use to find the angle between the horizon and stars in the sky is called a sextant.
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