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Polar-equatorial sundial in Moscow Planetarium

This instrument has two dials – equatorial and polar. The name of this sundial is “Peter and Wolf”. It is the name of well known opera created by Russian composer Sergey Prokofiev for children. Every Russian schoolboy and schoolgirl studies this opera in primary school. All my sundials are intended to advance the children’s astronomic education. I think that children should not forget that objective sciences and subjective arts, like music, are identical ways to understand the world.