Understanding Planet Orbits & Revolutions Around the Sun

[kalidas1992]

I am not so good in astronomy but i had desire to know what was in there right from my childhood. can you please clear me the following questions i have in my life about space..
1.Why does planets follow the same path or trajectory to orbit around the sun and why do they revolve around the sun?
2.Is there any force that governs the movement of planets orbiting around the sun?

 

[Simon Bridge]

1.Why does planets follow the same path or trajectory to orbit around the sun and why do they revolve around the sun?

Can't say why - that would involve metaphysics - but there are lats of ways that the situation we see could have come about.
The established model involves most of the planets and the Sun forming from the same base material a long time ago - long enough for almost all those objects that do not orbit the Sun to have left. Studies of exoplanets are challenging the details of these ideas though.
http://www.nhm.ac.uk/print-version/?p=/nature-online/space/planets-solar-system/formation/index.html
http://www.universetoday.com/38118/how-was-the-solar-system-formed/
http://hubblesite.org/reference_desk/faq/answer.php.id=2&cat=solarsystem

2.Is there any force that governs the movement of planets orbiting around the sun?

Yes. The Sun and the Planets move about each other according to the Law of Gravity.
http://solarsystem.nasa.gov/yss/display.cfm?ThemeID=28

 

[tfr000]

1.Why does planets follow the same path or trajectory to orbit around the sun and why do they revolve around the sun?

Because the gravity of the Sun is the major force governing their motion. All other forces are minor. Any body in motion near the Sun feels the pull of its gravity, and little else. Because that force is directed at the Sun, the path tends to curve around the Sun. As there is little or no force to pull the body out of that curve (for instance, perpendicular to the plane of the curve), the curve tends to remain in the same plane.

They revolve around the Sun because they are in motion - if they were at rest relative to the Sun, they would fall straight into it. If you work out the equations of gravitational motion, any object in motion around a massive body goes into an orbit about it, of one sort or another.

 

[Simon Bridge]

Not all free fall trajectories are cyclic though...
The trouble with answering the questions like this is that the answer tends to beg the question:
how come the planets all go around the Sun?
because all other forces are minor.
how come all the other forces are minor?
Because, if they were major, then the planets involved would no longer be here
... and so on.

There are probably a lot of bodies in the solar system that are just passing through like this... orbit for a while in a highly eccentric fashion for a while then get kicked out when they come too close to a planet.

It's not entirely clear what would constitute a satisfactory answer here.
I'm hoping the reading will help OP clear up some concepts, then, if the questions remain, they can be asked again in a way that makes it easier to work out where the confusion lies.

 

[pmacias]

3.How do scientists calculate the orbital path and revolution time of a planet?

1. The reason why planets follow the same path or trajectory to orbit around the sun is due to the laws of gravity and motion. According to Newton's law of universal gravitation, every object with mass in the universe attracts other objects with a force proportional to their masses and inversely proportional to the square of the distance between them. This means that the sun's massive gravitational pull keeps the planets in orbit around it, while their own motion keeps them from falling into the sun. Additionally, the planets' orbits are also influenced by their initial speeds and directions, which were determined during the formation of the solar system.

2. Yes, there is a force that governs the movement of planets orbiting around the sun. As mentioned before, this force is gravity. The sun's massive gravitational pull keeps the planets in their orbits, while the planets' own mass creates a gravitational pull on the sun. This balance of forces allows the planets to maintain a stable orbit around the sun.

3. Scientists use various methods to calculate the orbital path and revolution time of a planet. One method is through observation using telescopes and other instruments to track the planet's position and movement over time. From these observations, scientists can determine the planet's orbital path and revolution time. Another method is through mathematical calculations using Newton's laws of motion and gravitation. By plugging in the necessary variables such as the mass of the planet and the sun, scientists can calculate the orbital path and revolution time. Additionally, space missions and spacecraft have also provided valuable data and measurements that have helped scientists accurately calculate the orbital paths and revolution times of planets in our solar system.