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Earth Science – Contents of the Solar System Name: Gabby Sindac http://www.nasm.si.edu/ceps/ETP/ Planet/Object Diameter (km) Distance from the Sun (AU or km) Length of Day (rotation) Length of Year (Orbital Period) # of moons (if any) rings (Yes or No) Density 2 Other Facts Mercury 0.387 x Earth's 58.65 days 88 days 0 No Slightly less than earth’s Called a wandering star 0.38 x Earth's Venus 0.95 x Earth's 0.723 x Earth's 243 days (retrograde) 225 days 0 No 0.9 x Earth's Seen as an evening star Named after Roman goddess of love Known as frig Earth Mars 12,756 km (7,926 mi) 1 AU (149,600,000 km/ 92,960,000 mi) 6,792 km (4,220 mi) 1.524 AU (228,000,000 km/141,700,000 mi) 23.93 hours 365.26 days 1 No 5.52 g/cm³ Only planet to have water at 3 stages of matter Named after god of war 24 hr 37 min 687 days 2 No 0.7 x Earth The planet once had water flowing on it and has ice caps at its poles Jupiter has a liquid metal ocean Jupiter Saturn 142,980 km/88,846 mi 9.4 X Earth's 5.203 AU (778,400,000 km/483,700,000 mi) 9.5 X Earth's 9.92 hours 10.66 hours 11.86 years 29.46 Earth years Less than 60 Less than 25 Yes Yes 1.33 g/cm³ 0.13 X Earth's Jupiter's famous Red Spot is in fact a storm the size of Earth that has raged for hundreds of years. The second largest planet in the Solar System Saturn is famous because of the amazing rings that orbit the planet. Uranus 4.0 x Earth's 19.2 x Earth's 17.24 hours 84.01 Earth years More than 20 Yes 0.22 x Earth's After Saturn, a space-craft would have to travel 1,500,000,000 kilometres to reach Uranus Uranus orbits the Sun on its side Planet/Object Diameter (km) Distance from the Sun (AU or km) Length of Day (rotation) Length of Year (Orbital Period) # of moons (if any) rings (Yes or No) Density Neptune 3.883 x Earth's 30.06 x Earth's 16.11 hours 165 years 8 Yes 0.31 x Earth's Pluto .18 x earth 39.5 x earth 6.4 days 248.5 years 3 No .36 x earth 2 Other Facts Neptune is the outermost of the four gas giants: Jupiter, Saturn, Uranus, Neptune. Because of its distance from the Sun, Neptune's atmosphere is a frigid -225° C (-373° F). Pluto is too faint to be seen with the naked eye. When viewed through a telescope, it looks like a star Stellar occultations have revealed a tenuous atmosphere on Pluto composed primarily of nitrogen and methane gas