Revistes Catalanes amb Accés Obert (RACO)

Canvis en el concepte de sistema solar

Trinidad Cadefau Surroca, Maria Assumpció Català i Poch

Resum


Our knowledge of the solar system is constantly expanding. Ideas that initially
are accurate become uncertain and/or obsolete because they evolve and they
need to be revised. The planets of the solar system havent always been the neither
the same nor the same number. The concept of planet has also changed. This fact becomes
a tool to work in the classroom. Our proposal is based on two texts: The first
one, which we date approximately in 1850, presents the Planetary System made up
by 23 planets; the second includes resolutions 5 and 6 in which the IAU General Assembly
in Prague passed a new definition of planet, on August 24 of 2006.

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