circles,, why earth is circle and move in circle ??

Question

i did not mean to ask about weather one week ago ,, why you
think so,, i mean why earth is circle, moon is sircle , sun is circle, why your blood rotate , also your head is circle, i say
the answer never been available in education !! what do you
say ?

Answer 1

Large celestial objects (planets, stars, large moons, neutron stars, etc) are spherical due to their gravity. All the dirt that the Earth is made of tends to fall downhill until it reaches the lowest point it can get to, resulting in the Earth approximating a sphere. The same happens on the Moon, on the Sun, on Jupiter, etc.

Earth's orbit is not precisely circular, it is actually a closer approximation of an ellipse, although still not exactly. There are other objects which orbit in ellipses which are much less circular, for example the various comets. The Earth has a roughly circular orbit not so much due to coincidence, but rather because it is the planet we perceive ourselves as having evolved on, and it is much more likely for us to have evolved on a planet with a more constant temperature (planets with elliptical orbits this close to the Sun would have much larger temperature variations and be more hostile for life).

Our blood circulates through our body, but the path it follows is not even close to circular. It is much more complicated and goes through many different veins and arteries in various parts of our bodies.

Our heads are not precisely spherical either. The reason that they approximate a sphere is probably just because it is efficient: A sphere is the mathematical three-dimensional solid with the least surface area for its volume, which means an organism with a spherical head can keep more brain material in there without having to support too much hair, skin and skull tissue.

Does that answer your question?

Answer 2

Because circle and sphere have the same distance in all direction relative to a point. That is the natural shape of things pulled in or pushed out by roughly equal force.

Another reason will be that if earth don't move in circle orbit (earth orbit is almost circle), then you will not exist to ask this question.
The weather variation will be too high for any carbon based lifeforms, if the distance of the planet is not always the same all the time.

Anyway a cycle is always needed for any computation substrate, and your brain do need to compute for you to ask this question.

Answer 3

The earth is a sphere not a circle and it orbits the sun in an ellipse not a circle. This may seem small, but the distinction is very important.

Answer 4

In theory...I would say that it has something to do with the circle of life. There really is not an end but a continuance and our universe is formed in circular patterns as a result. It may be part of the equation that allows life to occur. It also may be something in physics that is a law. Not certain because I am no physics professor, but If you think of Newtons Law of Gravity, perhaps there is a physical law or theory out there in physics that answers this question or proposes to.

Answer 5

Albert Einstien's formulation of General Reletivity
shows that curved space, is the shortest path,
or path of least resistance in an enviroment
distorted by a large gravitational field, as
produced by the Sun.

Answer 6

Hi. They are roughly spheres. A sphere is the natural shape of a body that is being pulled inward from all directions. Orbits are ellipses and form due to physical forces of gravity. I would be surprised if your head was triangular!

Answer 7

Maybe so you can go around many times until you can finally learn to SPELL and compose a logical sentence with good grammar.

Answer 8

Because magic

Answer 9

I'm taking it they failed shapes in Kindergarten.

Answer 10

nobody realy knows the exact answers but they have an opinion.