ChatterBank1 min ago
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"The Big Dipper isn't going to set at all. It is as low in the sky as it gets and is beginning to climb again."
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That probably explains it: low in the sky means the light has to plough through more atmosphere to reach us, so it's dimmer.
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That probably explains it: low in the sky means the light has to plough through more atmosphere to reach us, so it's dimmer.
Megrez is significantly (by almost a full magnitude) dimmer than the other six stars of the Big Dipper (in both apparent and absolute magnitudes) and so would be most vulnerable to less than ideal seeing conditions.
http://en.wikipedia.org/wiki/Big_Dipper#Stars
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You wouldn't be the first to suggest it has perhaps faded (although this star type typically brightens with age) - https:/
http://en.wikipedia.org/wiki/Big_Dipper#Stars
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You wouldn't be the first to suggest it has perhaps faded (although this star type typically brightens with age) - https:/
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