Solar Planet System : A tour to our nine planets Mercury (Distance from sun : 57910 k.m.) Physical Data Radius: 2440 Mass : 3.30e23 Density : 5.43 g/cm3 Orbital Data Orbit : highly eccentric Sidereal Period: 87.97 days Atmospheric Data Composition: not Known yet Surface : terrestrial/rocky Temperature : 440 K Comment : Mercury is the closest planet to the Sun and the eighth largest. It has been visited by only one spacecraft, Mariner 10. Only 45% of the surface was mapped.For more information, go to : link for mercury Venus (Distance from sun : 108200 k.m.) Physical Data Radius: 6052 Mass : 4.87e24 Density : 5.24 g/cm3 Orbital Data Orbit : nearly circular Sidereal Period: 224.7 days Atmospheric Data Composition: CO2 , N2 Surface : terrestrial or rocky Temperature : 730 K Comment : Venus is the second planet from the Sun and the sixth largest. It is the brightest object in the sky except for the Sun and the Moon.For more information, go to : link for venus Earth (Distance from sun : 149600 k.m.) Physical Data Radius: 6378 Mass : 5.97e24 Density : 5.52 g/cm3 Orbital Data Orbit : nearly circular Sidereal Period: 365.26 days Atmospheric Data Composition: O2, N2, Ar Surface : terrestrial or rocky Temperature : 287 K Comment : Earth is the third planet from the Sun and the fifth largest. Also, it is the densest major body in the solar system.It is the only planet whose English name does not derive from Greek/Roman mythology. For more information, go to : link for earth Mars (Distance from sun : 227940 k.m.) Physical Data Radius: 3397 Mass : 6.42e23 Density : 3.93 g/cm3 Orbital Data Orbit : Significsntly elliptical Sidereal Period: 686.98 days Atmospheric Data Composition: CO2, N2, Ar Surface : terrestrial or rocky Temperature : 218 K Comment : Mars is the fourth planet from the Sun and the seventh largest. Except for Earth, Mars has the most highly varied and interesting terrain of any of the terrestrial planets. For more information, go to : link for mars Jupitar (Distance from sun : 778330 k.m.) Physical Data Radius: 71492 1.90e27 Density : 1.33 g/cm3 Orbital Data Orbit : highly eccentric Sidereal Period: 4332.71 days Atmospheric Data Composition: H2, He Surface : jovian or gas Temperature : 120 K Comment : Jupiter is the fifth planet from the Sun and by far the largest and fourth brightest object . It is more than twice as massive as all the other planets combined (318 times Earth). For more information, go to : link for jupiter Saturn (Distance from sun : 778330 k.m.) Physical Data Radius: 60268 Mass : 5.68e28 Density : .69g/cm3 Orbital Data Orbit : highly eccentric Sidereal Period: 10759.50 days Atmospheric Data Composition: H2, He Surface : jovian or gas Temperature : 88 K Comment : Saturn is the sixth planet from the Sun and the second largest. It is the least dense of the planets. For more information, go to : link for saturn Uranus (Distance from sun : 2870990 k.m.) Physical Data Radius: 25559 Mass : 8.68e25 Density : 1.32 g/cm3 Orbital Data Orbit : ecliptic Sidereal Period: 30685 days Atmospheric Data Composition: H2, He, CH4 Surface : jovian or gas Temperature : 59 K Comment : Uranus is the seventh planet from the Sun and the third largest (by diameter). It the first planet discovered in modern times. For more information, go to : link for uranus Neptune (Distance from sun : 4504300 k.m.) Physical Data Radius: 24766 Mass : 1.02e26 Density : 1.64 g/cm3 Orbital Data Orbit : eccentric Sidereal Period: 60190 days Atmospheric Data : Composition: H2, He, CH4 Surface : jovian or gas Temperature : 48 K Comment : Neptune is the eighth planet from the Sun and the fourth largest (by diameter). It has an internal heat source -- it radiates about twice as much energy as it receives from the Sun. For more information, go to : link for neptune Pluto (Distance from sun : 5913520 k.m.) Physical Data Radius: 1137 Mass : 1.27e22 Density : 2.06 g/cm3 Orbital Data Orbit : highly eccentric Sidereal Period: 90800 days Atmospheric Data Composition: N2, CH4, CO Surface : not known yet Temperature : 37 K Comment : Pluto is the farthest planet from the Sun (usually) and by far the smallest. It rotates from the opposite direction from most of the other planets.It is the only planet that has not been visited by a spacecraft. For more information, go to : link for pluto