How bright is the sun?


Brightness is subjective because it depends on the perspective of the observer. That being said, the sun's luminosity (which is a measure of electromagnetic energy released per unit of time) is 3.846x10^26 (10 to the 26th power) watts. Compare that to your 60 watt light bulb!
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1 Additional Answer
Brightness is measured in watts, like light bulbs. Our sun is approximately 390,000,000,000,000,000,000,000,000 watts. That is brighter than ALL of the light bulbs on Earth. For more interesting facts about the sun check out the following link. You can find more information here:
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