I need to know how to describe the formation of the solar system.  Thanks
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The fusion reaction explosion sent its matter hurtling at great speed outward in every direction in all sizes and speeds, both gases and molten solids, from the size of small particles to the size of the giant planets. Some of it was hurled out at such a great velocity that it was lost forever to other regions of the galaxy.\n\n# THE BIRTH OF THE SOLAR SYSTEM - About four and one half billion years ago our protosun was slowly collapsing under the force of its gravity. As it did this, due to the immense compression caused by gravity it became extremely hot. Millions of degrees centigrade. The more compact it got, the hotter it got. It was not alone in the sky, it was part of a community of stars and protostars that lay in the outer regions of our galaxy, the Milky Way. It was being swept around the galaxy, along with its neighbors, at the tremendous speed of over 500,000 miles per hour.\n\nSo far it had no satellites, (planets, moons, etc.) it’s gravity had sucked in most of the star dust from its vicinity for hundreds of millions of miles in every direction. It was getting close to the temperature and pressure required for a nuclear fusion reaction to occur. The protosun was like a giant nuclear hydrogen bomb waiting to be detonated.\n\n\n# THE BIG BANG - When this tremendous event finally did occur, the nuclear fusion reactions started up in the hottest most dense area of the Sun. Tremendous amounts of radiant nuclear energy were suddenly created in the innards of the Sun. All of this newly released energy caused a sudden sustained violent increase in the pressure and temperature of the Sun creating tremendous chain reactions throughout its core region.\n\nThese reactions did not just cause the star to began shining. It caused the Sun to violently expand to many times its former size and explode. The explosion sent its matter hurtling at great speed outward in every direction in all sizes and speeds, both gases and molten solids, from the size of small particles to the size of the giant planets. Some of it was hurled out at such a great velocity that it was lost forever to other regions of the galaxy.\n\n# THE BIRTH OF THE PLANETS AND OTHER SOLAR DEBRIS - Much of the debris eventually fell back, into the speeding Sun, if its trajectory was just right. Other debris, after it had expended its outward energy and had not broken free of the Sun's gravity, began to fall back toward the Sun.\n\n\nIt fell back toward the Sun, but due to the Sun's great galactic speed and changing position always missed the Sun. This is the matter that became the planets, moons, comets, asteroids of our solar system. They are the survivors.\n\nIt is like a skeet shooter who always aims directly at the clay pigeon, not allowing for a lead. His shot will never strike the pigeon simply because it will always have moved by the time the shot gets there. This is the basis on how our solar system works. It was a time of tremendous chaos in the solar vicinity, with all the matter rushing back toward the Sun from every direction crashing into each other and falling back into the Sun.\n\n# THE PULSATING SUN - After the initial explosion, the rapidly expanding sun began to cool. As it cooled the area that a fusion reaction could take place became smaller and smaller. Some of the fusion reaction began to shut down. The expansion eventually came to a halt as the fusion energy was no longer powerful enough to sustain the expanding outward momentum. Finally the expansion stopped altogether and then the Sun began to contract.\n\nThis at first stabilized the fusion reaction and then as the gravitational contraction of the Sun continued, the area of the reaction again began to increase. When the Sun had contracted to the point where the area of reaction was again very large, the Sun again expanded and exploded outward with tremendous force sending more matter hurling out into space.\n\n\n# THE STABLE STAR?? - This time however the expansion and explosion was
591964
The following link is a list of solar system objects by mass from most massive to least massive. If it was really by radius, not mass, you were after there is a blue link to it at the link below so it should be easy to view.
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Try the site below for information and the second link for a catalog of current orbits.  It's pretty technical but it should be fun deciphering.
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This question can't be adaquately addressed in this forum.  There are a couple websites you can refer to for these answers.\n\nhttp://solarsystem.nasa.gov\nhttp://www.nineplanets.org
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solar system is the system which includes the sun and the nine planets along with the satellites of each planet , asteroids , meteorites.
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Our solar system is tucked into a corner of the galaxy where the stars are scattered far from each other.\n\nThe stars are denser closer to its centre.
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Star name/Solar System Generators\n\nhttp://home.comcast.net/~brons/NerdCorner/StarGen/StarGen.html\n\nStar Maps\n\nhttp://www.fourmilab.ch/yoursky/\n\nhttp://csep10.phys.utk.edu/astr161/lect/time/maps.html\n\nhttp://www.skymaps.com/
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try reading  "Men are from Mars, Women are from Venus"\nit explains alot
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some asteriods have gravity.billions of years ago,some rocks gathetred together to form the planets.when two asteroids colide to one,small particals are blast out but still controlled by the gravity of the astroid.when millions of astroids form to one,the small particalls get more.soon planets are born.but every planet dont have moons yet instead they have rings even earth.the small particalls eventually will collide again to form moons.even saturns ring will eventually form moons and you can see no rings
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The body of planets, their moons and other objects that orbit the Sun.
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Super Solar System!\n\nPower Planets!\n\nAwesome Uranus! (just kidding)\n\nSuper-Model of the Stars\n\nThe Divine 9 (or if we're not counting pluto anymore..)\n\nThe Great 8\n\nThe Sun and Pals\n\nI don't know.. thats all my creative energy.. lol
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Wikipedia is always a good choice:\nhttp://en.wikipedia.org/wiki/Natural_satellite\n\nNine Planets is also good:\nhttp://nineplanets.org/
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Of your choices, (e) is the best.  (a) is no good because it fails to account for the continuing generation of heat, as, for example, by the earth.  (b) is no good because they were all about the same temperature when they formed.  As the protoplanets grew larger, their interiors began to heat up.  (c) is no good because what matters more is density, and there's no reason to believe there are significant differences in the density of radioactive elements.  (d) is just plain false: Earth is farther from the sun than Mercury.\n\nThat leaves (e).  Surface area of a sphere is 4pr^2, where p is pi, and volume is (4/3) pr^3, so the ratio of surface area to volume varies as 1/r ... it varies inversely with radius, so the ratio for smaller planets is greater than that for larger ones.\n\nThe key connection, though, is internal <pressure>, which is a direct function of r.  Larger planets have more pressure at their centers, and that means more heat.  In fact, if the "planet" were big enough, it would become a star.\n\nConclusion:  Big means hot.
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Simple Answer:\n\nCosmologist and Astronomers really don't know, but they have theories. \n\nThe predominant theory is called the nebular hypothesis. It states that our solar system was once a cloud of nebular dust and debris. As the gravity of this dust began to overcome the angular momentum of the cloud (somehow) it began to swirl and contract and the entire cloud all swirled in the same direction. Over time clumps started to form and build as the clumps gravity became stronger. The center clump of the cloud became our sun and all the other little clumps became the planets. \n\nThere are many problems with this theory, but that goes for a lot of scientific theories.\n\nA planet could very well circle in the other direction but it would have to be hit with force greater than the force of it initially being pushed when the swirling cloud began. In fact some planets to rotate differently than ours and I believe uranus is tilted completely on it's back relative to it's poles. Several small moons also rotate backwards. The theory being that large astronomical objects hit them and caused them to go retrograde.\n\nbut remember, these are all theories.\n\nHope this helps.
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GREAT QUESTION!!!!\n\nThe Kuiper Belt is the "leftovers" from when the Solar System was formed. It exists out past the orbit of Neptune.\n When our Solar System was forming out of an interstellar cloud, most of the matter was gravitationally pulled to the center. This caused the center to heat up until fusion began and our Sun was born. What was left behind began spinning around the new Sun and eventually became the nine planets, asteroids, and moons that make up our stellar home. \n There is an Asteroid Belt between Mars and Jupiter that is made up of mainly rocky objects, but this is not the Kuiper Belt. As the Sun became hotter and hotter, it actually "melted * " all of the ice in the inner Solar system and pushed it out to the outer solar system along with most of the excess gas and dust left over from the Sun's creation. What was left in the inner Solar System was the rocky-- or terrestrial(Earth-like)-- planets of Mercury, Venus, Earth-Moon, Mars and the Asteriod Belt. \nThe ices, and gas that was pushed out farther became the four gas giants-- or Jovian(Jupiter-like)-- planets of Jupiter, Saturn, Uranus, Neptune, and all of the icey Moons that orbit them. \nIf the theory is correct, that why Jupiter has most of the excess mass left over from the Sun's creation at that part of the Solar System. It was far enough- and cold enough away from the Sun for the ice to become solid enough again. The cooler gas, collapsed down to become mostly Jupiter at that distance from the Sun. (That's why it was such a big surprise to discover Jupiter + sized planets around other stars at distances very close to their sun.) The rest of this gas became Saturn, Uranus, and Neptune. \nFarther out than Neptune, the only things left were unmodified (not melted) ices. \nTHAT'S THE KUIPER BELT!\n It's believed to be another "asteroid belt" of sorts, but it is made up of mainly "dirty ice" which is mainly different kinds of ice and water ice with rocks and dust--think of it as dirt-- thrown in.(Astronomers can't just call something as simple as dirt, dirt, so they call it dust. Dust includes stuff like dirt, rocks, and anything else you might find in an interstellar cloud.) \n That is what Pluto and it's Moons are made of, as well as the recently discovered objects that are a little smaller than Pluto, and the one they found that is larger.\n That's why people are now questioning whether Pluto should be called a planet, because there are probably millions of these "Trans-Neptune objcts" out there waiting to be discovered. These little snowballs are of interest because they are basically undisturbed relics from before the Sun existed and can tell us quite a bit about the early Solar System, the Earth, and us!\n These ices should be different for the icy moons of Jupiter, Saturn, etc. because they weren't melted and pushed out away from the Sun. They were always far away beyond the orbit of Neptune and left undisturbed. \nStick around for the next 9 1/2 years as our Pluto spacecraft flys out there and notice all of the other discoveries of new Kuiper Belt Objects in the years before it arrives!!!\n ------------------------------------------------\n* Ice can't "melt" in the vacuum of space, so it goes straight from a solid to a gas. (We call solid water, for example, ice, and gaseous water, water vapor.)
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When the cloud of gas and dust that formed the sun began to gather together to form the sun, some of it didn't get sucked in by the increasing gravity at the center, but gathered together into less-dense "rings" around the newly-formed sun.\n\nThen gravity did its magic on those gases and dust, gathering them together into smaller balls, the planets. Around some of them were still smaller rings, which gathered together into moons, or, in some cases, more widely dispersed rings.\n\nIf you play with water, stirring it with a pencil to create a little whirlpool, then drop little bits of soil or even food coloring into it, you'll get a feel for how it might have happened. It's not the same, but if you watch it and try, you can imagine how it might have happened.\n\nThen, of course, you'll start wondering about hurricanes. <g>
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http://sse.jpl.nasa.gov/planets/profile.cfm?Object=SolarSys&Display=Overview\n\nCheck out this website, you can find all the info you need about each of the planets and the sun here.