S3 Solar System. 



primary, while they, with the primary 

 planets about which they move, are car- 

 ried round the sun. The planets move 

 round the sun at various distances, some 

 being much nearer to him than our earth, 

 and others being much further off. 



There are nine primary planets, which 

 are situated with respect to their distan- 

 ces from the sun as follows : 



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Mercury, Venus, The Earth, Mars, Ceres, Pallas t 



2f " T? $ 



Jupiter, Saturn, and Herschel, or the Georgium Sidus. 



Of these, our earth is accompanied by 

 one moon, Jupiter has four moons, Sa- 

 turn has seven moons, and the Georgium, 

 planet has six moons. None of these 

 moons, except our own, can be seen with- 

 out a good telescope. The other five 

 planets do not appear to have any satel- 

 lites or moons. 



All the planets move round the sun 

 from west to east, and in the same direc- 

 tion do the moons revolve round their 

 primaries, excepting thos^ of the Georgi- 

 um planet, which seem to move in a con- 

 trary direction. The paths in which 

 they move round are called their orbits* 



