How were the planets formed?
113272
now i dont know much detail, but according to science, there was what is called the Big Bang.  here, this big, huge gas ball started spinning really really fast and formed the milky way, then, smaller gas balls were formed which are the plantes.  then the moons are astroids lurned into the planet's gravitational force.  (just remember-this is not detailed ONE BIT and i might even be wrong on some of this-but the basic idea is correct.)
661513
The earth came into existence by some as yet undetermined process, the most likely of which was a "big bang" whereby all existing planets and solar systems began to form into their current transitory states. During that process, animal life began to form on the earth, by yet another unknown process. The earth is currently in a state of transition that will eventually result in its return to the previous unknown condition that resulted in the "big bang."\n\n\n\nNow send me $5 or I'll put a curse on you.
1118239
So many questions.  I'll go with what I know:\nthe universe is expanding\nstars generate energy from fusion of Hydrogen, except later in life when it's heavier elements.\nstars' death depends on the mass\nstars end life as :nova, supernova, black hole, so they must begin life as a nebula\nmassive stars become black holes or ... neutron stars/pulsars? I think\n4 terrestrial planets:\nMercury, Venus, Earth, Mars.  Earth and Mars have natual satellites.  Mercury is the smallest.  Between the inner planets & outer planets is an asteroid belt.\nThe outer planets are Jupiter, Saturn, Uranus, Neptune and Pluto.  Sometimes the path of Pluto makes it closer to the sun than Neptune.  Otherwise, I've listed them in order outward from the sun.
292052
That's a really good question, that doesn't have an answer yet.  The current theory of solar system formation suggests that planets spin in coordination with the orbital spin of the disk of matter that forms the core of the solar system.  The spin of the accretion disk itself is the result of conservation of angular momentum, and can either be clockwise or counter-clockwise, which would be a relatively random process.\n\nThere are 'accidents' however, whereby planets are impacted by other large bodies in random ways and can greatly skew the planetary orbit and/or spin.\n\nSometimes the results are really weird, such as Uranus, which rotates top-to-bottom relative to the plane of our solar system.\n\nFrankly, until we're able to do a survey of planets in our galaxy and a few others, I think it would be hard to guess what the real averages would look like, and whether or not they are random.
353329
There are many planets discovered (through pictures of many forms). There haven't been any planets discovered with life on them, but there have been many planets discovered.
300263
Our sun began forming within an immense interstellar cloud of drifting gas and dust. Inside this cloud (called a 'nebula') were regions of relatively high density where gravity began drawing together bits and pieces of the gas and dust. Over several million years, this spherical region became denser and denser which caused its central temperature to rise. Finally, some 4.5-billion years ago, the temperature was hot enough to start nuclear fusion. Our sun was born.\n\nGod should be spelled B-I-G B-A-N-G\nPBrax@netscape.com
518764
Earth wasn't invented (at least not if you listen to common sense), it was created from abiotic (non-living) sources. It started when hydrogen and helium clouds turned into stars because of their gravitational force. These stars then developed other simple elements like oxygen, nitrogen and carbon (necessary for organic compounds) these brought about nebulas which made simple compounds. Eventually matter formed into large masses that became planets, comets, and asteroids.
1067944
Some of them do, some of them don't.  It depends on where the star is in its lifecycle.  Planets form when stardust cools down.\n\nCheck out the link below.
935247
Our solar system- the Sun, planets, Kuiper belt and Oort cloud, everything orbiting the sun even many times further than the orbit of Pluto- is thought to have condensed from a vast cloud of interstellar gas some billions of years ago when that cloud was shocked or squeezed by a supernova explosion. The dust and grains that condensed out of the cooling solar gas aggregated to form larger fragments of rock. Chondritic meteorites are basically just such collections of grains and fragments that have been compacted together to form a larger piece of rock and eventually small planetary bodies. Such bodies are termed planetesimals when they become roughly as large as asteroids (several kilometres to a few hundred kilometres in dimension). The larger they grow, the greater the gravitational attraction that the planetesimals exert and hence the more effectively they sweep up additional particles and rock fragments while circling the Sun. (Britannica CD) \n\nBecause that initial shockwave came from a particular direction and because the cloud was not of uniform density, the particles had a net rotation around their center of gravity. Humans subsequently identified that direction as "counterclockwise as viewed from above the north pole of the sun". As the bodies of the solar system grew by accretion, particles swept up from different distances from the center of gravity (the sun) had different orbital velocities. Analogously, water swirling down a drain moves slower further and faster closer to the center. \n\nGalileo and Newton showed that rotational energy is conserved: The sun and planets ‘inherited' their spin from the orbits of their constituent particles, so to speak. Today, some five billion years later, all that rotational energy is still conserved in the rotations and revolutions of the bodies of the solar system. Our solar system is not unchanging, though. Because of gravitational interactions between moons and their planets, between the planets, meteors and comets themselves and interactions between the solar wind and the magnetospheres of the planets, rotational energy is still be ‘traded' back and forth: Mercury orbits in a 3:2 resonance with its rotation, our day is getting longer while the moon only shows one face towards us, the rings of the gas giants are temporary phenomena,... But that's another story.
543004
Technically, the general rotation direction of the Sun and most planets is a leftover from the original solar nebula from which the Solar System formed.  As the planets and Sun coalesced, they retained the rotation direction of the original nebula.\n\nDuring the coalescence phase, asteroid-size chunks collided and stuck together.  As more and more of these chunks collected, the planets grew in size.  However, these chunks not only brought mass to the mix, they also brought momentum.  Since most of the materials were probably all travelling in more or less the same direction, the general rotation direction of the growing planets remained the same.\n\nIn the case of Venus and Uranus, it is suspected that a major collision between the planet and another body literally tipped the planets over due to an off-center orientation of the collision.  Uranus tipped over on its side, probably due to its size relative to the other body.  Venus, being smaller, tipped so far over that its rotation was reversed.
744734
Astronomy studies among other things, how planets, including the earth form.
936747
The planets all condensed from the same dust cloud. This cloud was in orbit around the sun and was rotating. As a result of the rotation it was spun out into a disk - this is called an accretion disk and is seen around a lot of stars. So all of the planets condensed out of a disk and hence are in the same plane.\n\nSome objects orbiting the sun did not condense from this disk but were captured. These are typically not in the plane of the ecliptic. Pluto - recently removed from the canon of planets - is in this category.
1037168
That's a good question. I'm quite sure "God made it" isn't the answer you're looking for, especially since you posted this in the science section. \n\nReligion seems to have all the answers, but those answers never satisfy the appetite of curiosity and learning. Below are several different worded versions of the same basic theory of how the Earth (and other planets) formed. \n\nBe sure to check out the sources.\n\n1. The planets formed from the material left over as a result of our sun's formation. As the nebulous cloud condensed and began to rotate, most of the gas condensed into what is now our sun. The remaining material formed what is now the planets and the other bodies in our solar system.\n\n2. The prevailing theory is that they are formed from those remnants of a nebula that do not condense under gravity to form a protostar. Instead, these remnants become a thin disc of dust and gas revolving around the protostar and begin to condense about local concentrations of mass within the disc. These concentrations become ever more dense until they collapse inward under gravity to form protoplanets. When the protostar has grown such that it ignites to form a star, its solar wind blows away most of the disc's remaining material. Thereafter there still may be many protoplanets orbiting the star or each other, but over time many will collide, either to form a single larger planet or release material for other larger protoplanets or planets to absorb. Meanwhile, protoplanets that have avoided collisions may become moons of larger planets.\n\n3. The most widely accepted model for the origin of the Solar System is called the  nebula theory. Most generally phrased, the theory states that the Solar System condensed from a large, lumpy cloud of cold gas and dust.\n\n4. Solar Nebula Theory
304584
Yes, new stars and new planets can form from the remnants of dead stars.  We can see this process happening, although it is extremely slow, a process that take millions of years.\n\nEven our sun is thought to be a 3rd generation star.  When our sun dies, it will expand to become a Red Giant star, eventually cooling/contracting into a white dwarf, as this happens, a lot of stellar meterial will be released and will float off into space to make new stars in the future.
343386
how do you think the earth was created? Or you?
471415
What do you want to know about the creation of the earth? Our solar system condensed from a cloud of gas and dust about 5 billion years ago. This was induced by the gravity of that gas and dust. Most of the mass was incorporated into the sun or blown away when the sun's fusion reactions started. The remaining planetoids went through a period when they collided and merged forming the major planets including the earth. There is evidence that a Mars-sized object hit the earth fairly early on, forming the moon.
975767
From the planets you just mentioned.