What are the relative sizes of the eighht planets?
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this is to scale: http://en.wikipedia.org/wiki/Image:NewSolarSystem2.jpg
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Surprisingly, there is no total agreement about the size of our Solar System. Some say it's defined by the orbit of the outermost planet (used to be Pluto), while others say it's where the Sun's heliosphere ends. Then there's the definition that I personally favor -- the Oort Cloud of comets.\n\nHere's a breakdown of the three major sizes favored:\nPluto orbit - 5,900^6 km\nHeliosphere - 2.2^10 km \nOort Cloud  - 1.5^13 km (1.6 light years)
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32.675 AU for jupiter's circumference, and 2.406 AU for mercury.  Jupiter is the largest planet in our solar system.
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Ten. A new planet has been discovered that is approximately the same size as Pluto. It has not yet been formally named. Check http://www.nasa.gov/vision/universe/solarsystem/newplanet-072905-images.html for more info:)
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The size wise order of the planets in our Solar system is as follows:-\n1) Jupiter, 2) Saturn,3) Uranus or Herschel,4) Neptune\n5) Earth, 6) Venus, 7)Mars,8)Mercury,9)Pluto.\nThe largest is Jupiter and the smallest is Pluto. Our moon is a natural satellite of the earth and not an independent planet. It is smaller than Pluto.
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This website shows relative distances from the sun. You can then calculate their distances from each other by using (Farther planet's distance)-(closer planet's distance).\n\nhttp://www.idahoptv.org/ntti/nttilessons/lessons2000/lau4.html
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http://hypertextbook.com/facts/2001/DanielChen.shtml\n\nEarth has a surface area of 196,940,400 square miles, slightly less than a perfect ball with a diameter of 7913.5 miles (which is the mean diameter of the Earth - see "Prove it" under 103).\n\nhttp://pages.prodigy.net/jhonig/bignum/qland2.html
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mercury: .4 AU\nvenus: .7 AU\nEarth: 1 AU\nmars: 1.5 AU\njupiter 5.2 AU\nsaturn: 9.5 AU\nuranus: 19.2 AU\nneptune: 30.1 AU\npluto: 39.4 AU
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First ... assume an average diameter (or radius) for the planet.\n\nThe average radius normally given is 3963.1 miles (6378 km).\n\nCircumference of a circle = 2 * pi * r = pi * d\n\nCircumference = (2) * (3.14159) * (3963.1) = 24900.9 miles\n... which is approximately 40074 km.
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The formula is to simply divide the mass of the sun by the mass of whatever planet you are interested in.\n\nThe sun's mass is: 1.989 x 10^30 kg\n\nThe mass of the planets:\nMercury: 0.33 x 10^24 kg\nVenus:   4.87 x 10^24 kg\nEarth:   5.98 x 10^24 kg\nMars:    0.65 x 10^24 kg\nJupiter: 1900 x 10^24 kg\nSaturn:   570 x 10^24 kg\nUranus     87 x 10^24 kg\nNeptune:  100 x 10^24 kg\nPluto:    0.7 x 10^24 kg\n\nSo, for instance, 332,609 earths would weigh the same as the sun.
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Pluto has a diameter of 2306 ± 20 km. Mercury's diameter is 4879.4 km. Also, Mars' diameter is 6,804.9 km. So, Mercury is the planet closest in size to Pluto, judging by diameter.
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The *relative* distances between the planets can be determined from Kepler's laws and Newtonian physics. This will give the ratios betwen all the distances in the solar system. Once this is done, only one *absolute* distance needs to be found to get all of the rest. Until fairly recently, absolute distances were determined through parallax. It is possible to watch a transit of Venus from two different locations on earth and get a parallax measurement of the distance to Venus in that way. This gives the actual distance between the earth and Venus, and so the distance from the earth to the sun.\n\nOther methods involved parallax measurements of asteroids that pass close enought to the earth to get good measurements. Now, it is much easier to use radio bounced off of other planets (or probes) and the speed of light to get the required absolute distances.
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You can buy kits at places like Hobby Lobby, but you can do way better on your own. I used the information in the links below to make a scale model where I used a basket ball for the Sun and various pin heads and acorns for the planets. The first link below is an on line calculator that will tell you how big to make the planets and how far apart to place them if you just enter the size you want to make the Sun. I bet you are surprised at how small and far apart the planets really are!
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in our solar system: 9\n\neven though larger bodies exist in our solar system, we're too used to having 9 planets to ever change.
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This directory should give you the north polar CC for all the planets out to Pluto; the southern ones should be easy to extrapolate from these figures.\n\nhttp://nssdc.gsfc.nasa.gov/planetary/planetfact.html
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Neptune's distance from the Sun 30.06 A.U. 4478.26 x 106 km\nPluto's distance from the Sun 39.48 A.U.   5906.38 x 106 km\n \n9.42 A.U. 1428.12 X 106 km (approximately when Pluto is the 9th planet) This is each planets distance from the sun subtracted from each other.  hope this helps
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Equatorial Diameter: 7937 miles\nPolar Diameter: 7900 miles\n\nThe equatorial diameter is greater because the Earth is  spinning on it's axis (at about 1000 mph at the equator) which greats a centrifugal force pulling away from the center of the planet. This effectively lessens the gravitational pull at the equator and the equatorial regions of the planet bulge out.\n\nYou'll also find some other interesting solar system data at the site below.