Elder Secrets and The Glorious ReAscent of Yelm disagree on some points. Which is correct?
There are actually very few contradictions between the two sources. In general, however, The Glorious ReAscent of Yelm, as the later source, should be taken as correct. Thus, the sky dome appears (from below) to turn in a clockwise direction, per GRoY, not the counter-clockwise direction mentioned in one place (but contradicted elsewhere in the same article) in Elder Secrets. However, GRoY on occasion implies that the Pole Star is stationary, and does not move at all. This implication is incorrect — Pole Star, like most of the rest of the Dome, does tilt north in summer and south in winter, though the amount of tilt is small enough that it can be ignored for most purposes. However, the Pole Star is stationary in relation to all the other stars, which circle the sky with Pole Star as the axis. Other information from GRoY and Elder Secrets both are still under evaluation, and specific parts of either may turn out to be incorrect. Thus, as indicated in the next question, the periods give