Only 25% answered correctly (in prose or with a well-labeled diagram). 40% had incomplete explanations or diagrams, several simply stating: "Because the moon has phases." The remaining 35% were incorrect explanations. However, only 7% of the answers (20% of the incorrect explanations) ...
Agreement is within ±7% for the great majority of the lunar phases, and larger discrepancies outside the range are mainly concentrated in the waning Moon, precisely due to the inability of MT2009 to distinguish the waxing versus waning lunar phases. Moreover, the MT2009 simulations are ...