Why do the planets in our solar system revolve around the sun in roughly the same plane?
111203
I think the current theory is that it comes from the origin of the solar system as a spinning mass of material. This material had a certain angular momentum, which was retained as the material coalesced into the sun and the planets and moons and other bodies. So there are only a few planets and moons whose orbital and rotational angular momentum vectors are not aligned with each other (like Neptune, and Venus, Triton and a few of the smaller, more distant moons of Jupiter and Saturn).
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.
991215
Because the sun has a gravitational pull on all objects that rotate around it. The earth, like all the other planets revolving around the sun, is pulled toward it to a certain extent, which keeps the earth from floating away into outer space.
712687
If you imagine a solar system that includes the sun and the Earth,and no other bodies, the Earth would travel about the sun in an ellipse (strictly speaking, the Earth and the sun would travel around their common center of gravity in ellipses).  An ellipse has two foci, which are points that define the ellipse in the same way that a point defines the center location of a circle.  Because the sun is so large and the orbit is so nearly circular, both of the foci lie near the center of the sun  So it is not correct to say that one of the foci is the sun -- both foci are in the sun, but they're really just mathematical points that define the shape of the orbit.\n\nWhen you add more planets to the mix, things get much more complicated, but one can think of each approximately elliptical orbit separately, and then there is a different set of foci for each pair of bodies if one neglects the influence of the other bodies.
196821
The plane formed by the Earth's orbit is called the ecliptic. While most of the planets' orbits are close to this plane, Mercury and Pluto's orbits differ by several degrees.
440880
Well I am not sure if it is proper to apply the term to the sun, but the sun's apparent motion against the background of fixed stars is always in the same direction as that of planets that are moving in the prograde direction.
48080
coz it is move together with other planets in constant maner around the sun
321763
the system of a star called sun is is called Solar system.....\nall the systems of stars with planets around them are not solar systems.\nSolar system is name of our sun planets system
91267
You are referring to a concept in planetary astronomy call inclination of orbit.  The "disc" that the Earth revolves around the Sun on is called the ecliptic plane.\n\nTechnically speaking every other planet has some orbtial inclination or tilt of their disc.  But it is very small so the eight major planets are said to orbit in roughly the same plane (ecliptic).  \n\nPluto is different.  Its orbital inclination angle is about 18 degrees with respect to the ecliptic.  That's big compared to the other planets. \n\nNow the question is why are the eight major planets in the same plane?  Why is Pluto not?\n\nWhen the solar system formed it was originally a giant sphere of gas and dust and over time was gravitationally attracted into a compacted sphere.  When this happens systems need to conserve angular momentum.  This results in the sphere becoming flattened.  This flattened sphere now looks like a disc.  The disc is roughly the ecliptic plane. An analogy to this scenario is pizza dough being spun by a chef into a disc. \n\nPluto, it is believed, was probably originally part of this disc but later had an intereaction with another object which since changed its orbit.
884425
well the path of the planets is different for each due to the size but the are similar to a oval type shape, gravity hold the planets in orbit and as far as the asteroids they are freely moving until caught by a gravitational pull of a larger object
407938
It is a factor in their formation. As matter gravitationally comes in proximity with other matter, the "pieces" start orbiting one another. As other pieces join the group, they influence all the other pieces in the group simultaneously, so the whole set of objects tends to change it's axis of rotation as a group. In the end, there is a cluster of objects that all tend to rotate within the same general plane or around the same axis of rotation.\n\nFor example, most of the planets in the solar system rotate on an axis that is very similar to their axis of revolution around the sun. This is because the "pieces" of mater that formed the solar system started rotating around (orbiting) one another in a single plane. As some of the pieces crashed into one another and combined into planets, stars, etc. some of the orbital energy was transformed into rotational energy, but with angular momentum in the same direction as the rotational energy. Thus revolution and rotation are generally in the same direction with similar axes.
420776
a comet is a ball of rock and ice that orbits the sun on a large elliptical orbit.  THey usually are not in the normal orbital plane of the planets so we only see them once in a while. So if the planets go around and around like on a plate, comets go on an angle like a plate on a 75 degree angle.  And instead of the sun being close to the center of the plate, with comets, the sun is much closer to the edge of the plate.\n\nSome planets take far longer than 76 years to orbit (pluto, neptune, etc...) so their orbits are even larger.  But they are more regular, comet's orbits are more stretched out so they get closer to the sun.
634670
It has to do with the formation of the planets from the solar nebula based on the "nebular hypothesis."  That is why they are all on different orbits.
881564
Harmonic convergence is when all the planets in the solar system are aligned with one another. In harmony so to speak.
515806
The earth rotates on its axis (spins) the same way as the sun does on its axis, since the planets all formed out of the proto-solar disc when the sun was forming.  All of the planets spin the same way, EXCEPT for Venus, which rotates (very slowly, once every 243 days) in the opposite direction.  Some planetary scientists consider this evidence that Venus at one time collided with another large body early in its lifetime, which caused the retrograde rotation.
57630
No.\n\nThe orbits are inclined slightly and I do not believe there is a place where they would all be *exacly* in a line.\n\nBut they get close together in the sky. The visible planets are within a couple of degrees every twenty or thirty years. (Holding your fist out will block about 10 degrees.) Such an alignment in the sky can last for a few days.
966439
Not precisely, but that gives a very good first approximation. The planets generally orbit the Sun in the plane of the Solar equator, which is what you would expect. There are variations, most notably that of Neptune, (and until it was demoted to "dwarf planet", Pluto.\n\nThe plane of the Solar equator is inclined to the plane of the Earth's equator by approx. 7 degrees, and this means that the sun, and all the planets, follow this path, which is called the "ecliptic".It gets that name because the apparent path of the moon crosses the ecliptic at two points, called nodes, and it is when the moon and sun are both at or very near one of these nodes in their apparent motion that an eclipse, either solar or lunar, occurs.