When using the Big Dipper handle to locate M101, starting from Alkaid, how far towards the northwest should one trace?

Answer

Twice the distance between Alkaid and Mizar

One established method involves tracing a path roughly twice the distance separating Alkaid (the tip star) and Mizar (the second star from the tip) towards the northwest.

When using the Big Dipper handle to locate M101, starting from Alkaid, how far towards the northwest should one trace?
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