Why don't suns orbit around planets?

Question

We've found solar systems other than our own. And planets are always orbiting a sun. Why isn't there suns orbiting planets?

I dunno there are some gigantic planets out there.

Answer 1

The more mass an object has the greater the pull towards it or orbit around it.
The moon revolves around the Earth, the Earth revolves around the sun and the sun (and thus the entire solar system) revolves around the centre of our galaxy.

Even a dwarf star which could technically be smaller than a planet would be more massive so a star would not revolve around a planet.

However, in a binary system (with 2 stars) one of the stars could revolve around the other.

Answer 2

The orbital point for 2 masses is the center of their mass. For example although we say the Moon orbits the Earth, the Earth Moon system actually orbits a point some several hundred miles from the center of the Earth.

The same is true for any Sun-Planet system. Just balance the masses on a fulcrum to get the center point.

So now you can see that the Planets only appear to orbit the Sun because they are much less massive. All are actually orbiting a point which is the mass center of the total system.

Answer 3

One object does not orbit around another; they orbit around both objects combined center of mass called the barycenter.

So if we look at the earth and the sun we both tug on each other and orbit around the earth and suns center of mass. The Sun is much larger and heavier then the Earth also the Earth is in relative terms not far form the sun, combining these factors we find barycenter is found under the surface of the sun, not far our from the suns core. So the Earth orbits around a point not far from the core of the sun while the Sun is tugged around a point that is not far from it's own core a point that is so close to it's core the effect of the Earth on the sun is barley perceivable to the most sensitive scientific instruments.

If we look at a planet with the Mass of Jupiter and the distance Jupiter is from the Sun the Barycenter moves to a point just outside the suns surface. So Jupiter moves around this point just outside the suns surface and so does the Sun. So in the Jupiter and sun relationship Jupiter tugs the Sun around enough to be noticed.

This gravitational tugging and large planets pulling stars around is how we have now found exo-plantes or planets around other stars. We watch for stars that have differing red shifts over a period of time. If the red shift increases then decrease we know something large is orbiting that star and tugging it around. By the watching the star with sensitive instruments, and using the information we found looking at the stars spectrum we can see a slight dimming as the large planet (the planet must be large to cause a tug significant enough to make it noticeable at a distance of light years) passes between the star and our own Earth.

So in short in all cases planets and stars doesn’t orbit around one object but around the center of mass of both objects called the barycenter. In other solar systems the planets will look to be orbiting the systems sun because the systems sun will be the largest mass in the system.

Answer 4

Scott A has the best answer so far. He is right on target, but a little long winded.
Let me see if I can put it another, less technical way.
Suns and stars and planets all orbit each other. But the amount of movement that they make during that orbit is proportional to the ratio of their masses.
A big mass only moves a little while a smaller mass will move more.
Imagine picking up a little kid and swinging her around for fun. The little kid moves in a big circle and you move in a little circle.
On the scale of suns and planets, the suns do move, but it is such a small amount that it is very difficult to see it.

Answer 5

Because stars have a large massand so have more gravity than the other things.Moreover if a planet is so big then it will start giving off energy like stars (Because the most common element in the universe is hydrogen and when a planet has great mass it gets much hydrogen and also the hydrogen atoms gets much pressure and fuse into helium and give off light and heat just like stars)and will be identified by us as stars.

Answer 6

The very process of star / planet formation prevents this.
At start, we have a big mass of gas and particules.
Gravity attracts particules to each other.
The one that are far from the center of the "cloud" receive the pull of all others, and move towards the center of the cloud.
After a while, the particules at the center accumulate and start building the sun (the "Star"). Other particules, which are in less quantities, may accumulate to form lumps of particules that would become planets later on.
Once we have enough matter at the center of the cloud, gravity makes the cloud center to collapse on itself, heat up to very high temperature and start the fusion reaction. The star is born. The sun is born.
Planets continue to form, and are still under the attraction of the center of the cloud, now a shiny star...

Answer 7

just because suns are biggger than the planets, it has more gravity than the planets that's why the planets orbit around the suns, take earth and the sun, earth is nothing compared to the sun by size.
for more information turn on the discovery channel lol

Answer 8

The sun is comparatively bigger than any of the planets in our solar system. Hence, it has more gravitatonal pull. Due to this the planets revolve but not the sun.

Answer 9

The sun keeps the pulls the planets around the sun.
If the sun orbited around the planets, the sun magnet could pull or pushed all the planets and could cause a catastrophe!

Answer 10

When we say a system that mean that there are certain fixed things in it. Like solar syster, Sun is the master

If we say lunar system then the moon is the master.

It is just like a family.Children revolves round the head.