2 Astronomical Unit (AU) The average distance between the sun and the earth.
3 1 AU is equal to 93 million miles or 150 million kilometers An AU is a standard of distance used within the solar system
4 Example: Jupiter 5.2 AULight travels 1 AU in eight minutes.Sound travels 1 AU in 14 years
5 The Planets of Our Solar System The Inner PlanetsSizes to ScaleMercury Venus Earth and Moon Mars
6 The Planets of Our Solar System The Outer PlanetsJupiterSaturnEarth Included for Scale.UranusPlutoNeptune
7 SIZES AND DISTANCES IN THE SOLAR SYSTEM Diameters of Solar System Members:Sun = 1,392,000 kmMercury = 4,878 kmVenus = 12,104 kmEarth = 12,756 kmMars = 6,794 kmJupiter = 142,984 kmSaturn = 120,536 kmUranus = 51,118 kmNeptune = 49,530 kmPluto = 2,304 kmMean Distance from Sun57,900,000 km = AU108,200,000 km = AU149,600,000 km = AU227,900,000 km = AU778,300,000 km = AU1,427,000,000 km = AU2,871,000,000 km = AU4,497,000,000 km = AU5,914,000,000 km = AUEarth’s Moon = 3,476 km Mean Distance from Earth = 384,400 km
8 Fun Facts About the Planets 18 Mercury’s would fit inside the Earth.Venus is always cloudy.Earth is the only planet we know with life.Mars is red because it is covered with rust.A storm (hurricane) on Jupiter can swallow 2 Earths.Each season on Saturn is more than seven years long.By the time you get to Uranus, you are only halfway to Pluto.Neptune is the windiest planet, with winds blowingover 1,000 miles-per-hour.Pluto is a ball of ice and rock and is a dwarf planet.
9 Light Year (LY) The distance a ray of light travels in one year The speed of the ray of light would be equal to:7.2 AU per hour or300,000 km/sec or186,000 miles/sec.
10 Milky Way Galaxy is approx. 100,000 LY across in distance A Light Year is a standard unit of measurement for interstellar distances beyond the solar system.Milky Way Galaxy is approx. 100,000 LY across in distance