MercuryMercury is the closest planet to the Sun andthe eighth largest. Mercury is slightly smallerin diameter than the moons Ganymede andTitan but more than twice as massive.
VenusVenus orbit is the mostnearly circular of that of anyplanet, with an eccentricityof less than 1%. orbit: 108,200,000 km(0.72 AU) from Sun diameter: 12,103.6 km mass: 4.869e24 kg
EarthEarth is the third planet from the Sun and the fifthlargest: orbit: 149,600,000 km (1.00 AU) from Sun diameter: 12,756.3 km mass: 5.972e24 kgEarth is the only planet whose English name does notderive from Greek/Roman mythology. The namederives from Old English and Germanic. There are, ofcourse, hundreds of other names for the planet inother languages. In Roman Mythology, the goddess ofthe Earth was Tellus - the fertile soil (Greek:Gaia, terra mater - Mother Earth).
MarsMars is the fourth planet from the Sun and the seventhlargest: orbit: 227,940,000 km (1.52 AU) from Sun diameter: 6,794 km mass: 6.4219e23 kgMars (Greek: Ares) is the god of War. The planet probablygot this name due to its red color; Mars is sometimesreferred to as the Red Planet. (An interesting side note: theRoman god Mars was a god of agriculture before becomingassociated with the Greek Ares; those in favor of colonizingand terraforming Mars may prefer this symbolism.) Thename of the month March derives from Mars.
JupiterJupiter is the fifth planet from the Sun and by far the largest.Jupiter is more than twice as massive as all the other planetscombined (the mass of Jupiter is 318 times that of Earth). orbit: 778,330,000 km (5.20 AU) from Sun diameter: 142,984 km (equatorial) mass: 1.900e27 kg
SaturnSaturn is the sixth planet from the Sunand the second largest: orbit: 1,429,400,000 km (9.54AU) from Sun diameter: 120,536 km (equatorial) mass: 5.68e26 kg
UranusUranus is the seventh planet from the Sunand the third largest (by diameter).Uranus is larger in diameter but smaller inmass than Neptune. orbit: 2,870,990,000 km (19.218AU) from Sun diameter: 51,118 km (equatorial) mass: 8.683e25 kg
NeptuneNeptune is the eighth planet fromthe Sun and the fourth largest (bydiameter). Neptune is smaller indiameter but larger in mass thanUranus. orbit: 4,504,000,000 km(30.06 AU) from Sun diameter: 49,532 km(equatorial) mass: 1.0247e26 kg
PlutoPluto orbits beyond the orbit of Neptune(usually). It is much smaller than any ofthe official planets and now classified as a"dwarf planet". Pluto is smaller thanseven of the solar systems moons (theMoon, Io, Europa, Ganymede, Callisto, Titan and Triton). orbit: 5,913,520,000 km (39.5 AU)from the Sun (average) diameter: 2274 km mass: 1.27e22 kgRead more about Pluto l Plutofacts, pictures and information. bynineplanets.org