jueves, 25 de febrero de 2010

"Our Solar System"

Diapositiva 2
lOur Solar System consists of all the planets that orbit our Sun.
lOur Solar System also has many moons, comets, asteroids, and dwarf planets(like Pluto).
lScientists do not know how many Solar Systems there are in the universe.  There could be billions!

Solar System Facts Slideshow
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