The term used for the observable brightness of a star is called magnitude. I hope this helps :)
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According to the social readjustment scale, Life events which produces the greatest changed in life and then, requires the greatest adaptation, nevertheless not minding whether such events are negative or positive.
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A referendum is a type of democratic function which allows citizens to vote directly in the enacting of laws or policies put before a government. Therefore, the ability for citizens to enact a law is a referendum. This would normally occur through a ballot initiative or direct vote.