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planets=[ {name: 'mercury', perihelion: 0.307499, eccentricity: 0.205630, size: 4, color: 'gray' }, {name: 'venus', perihelion: 0.718440, eccentricity: 0.006756, size: 5, color: 'white' }, {name: 'earth', perihelion: 0.98329134, eccentricity: 0.01671123, size: 8, color: 'blue' }, {name: 'mars', perihelion: 1.381497, eccentricity: 0.093315, size: 6, color: 'red' }, ];