Officially known as 2003 VB12, this object is the most distant body known that orbits our Sun. It is at present over 90 AUs away, 3 times as far as Pluto. Sedna is about 1800 km in diameter, slightly smaller than Pluto. Perhaps the most interesting aspect of Sedna is its orbit....
Pluto
Pluto orbits beyond the orbit of Neptune (usually). It is much smaller than any of the official planets and now classified as a "dwarf planet". Pluto is smaller than seven of the solar system's moons (the Moon, Io, Europa, Ganymede, Callisto, Titan and Triton)....
Neptune
Neptune is the eighth planet from the Sun and the fourth largest (by diameter). Neptune is smaller in diameter but larger in mass than Uranus....
All About Saturn
Saturn is the sixth planet from the Sun and the second largest: orbit: 1,429,400,000 km (9.54 AU) from Sun diameter: 120,536 km (equatorial) mass: 5.68e26 kg Hardcopy The New Solar System Summarizes what we have learned from interplanetary explorations in the last 25 years....
Comet Shoemaker-Levy 9
Comet Shoemaker-Levy 9 was discovered by Eugene and Carolyn Shoemaker and David Levy in 1993. Shortly after its discovery it was determined to be in a highly elliptical path near Jupiter and on a collision course....
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