In which year was establish that the earth is round?
610717
Before the birth of Christ there was records supporting the theory. The early Greeks and Romans wrote about the shape of earth. Like so much of the early learning's the words were ignored, misplaced, and ridiculed until the 1400's at which time early seaman of that century wrote about the earth being round and map makers drew it that way.
42171
A fact is that the world is round (it can be proved). An opinion is the world is flat (a statement that can be proved wrong).
33603
approx 325 BC\n\nhttp://en.wikipedia.org/wiki/Euclid
281335
The law you are referring to is the law of inertia, which is directly related to the laws of gravity.  The heat from the sun and it's gravitational pull are what "make the earth go round"
237460
May 10, 1954\n\nhttp://www.britannica.com/eb/article-9343590?tocId=9343590
215975
one revolution of the earth around the sun
564572
Because of the curvature of the earth.
185547
not without knowing it is right to a reasonable degree. For instance if this were 1400 and you asked if the world was flat i would say of course but we now know that it is round. Science is constantly changing thier answers to a lot of questions due to the fact that new research is proving them incorrect.
582290
i am round\nlike earth
11338
The earth is round. There are some physical proofs below, assuming you don't trust the pictures of the Earth taken from the various space programs.
406668
It varies between 147,090,000 km and 152,100,000 km, because the Earth's orbit is elliptical, not circular.
182867
The basic observations were done thousands of years ago. THe ancient Greeks knew that the direction of the pole changes over time (also known as the progression of the equinoxes). Of course, it wasn't until recently that this effect was explained by the wobble of the earths axis. It used to be seen as just another cosmic cycle.
8760
None, the two are not related. Earth's rotation is a measure of time and light years are a measure of distance.
603151
The Flat Earth Society believes it's flat and the Square Earth Society believes it's square.\nhttp://www.indiana.edu/~ensiweb/lessons/flaterth.html\nhttp://home.netcom.com/~rogermw/square_earth.html
9991
To a first-order approximation the Earth is round.  This\nis due to gravity.  Gravity pulls with equal strength in all\ndirections; therefore any variations from a spherical\nshape will lead to gravitational forces that\nbring the shape back into that of a sphere.\n \nThis is without considering the rotation of the earth,\nhowever.  The rotation of the earth adds centrifugal\neffects, which cause the earth to bulge slightly at\nits equator and flatten slightly at its poles.\n(This is like twirling a rock on the end of a string\nand then letting go--the rock flies away from the\ntwirler.)  Because of these centrifugal effects, the\ndistance from the center of the earth to the surface\nof the earth is about 0.33% shorter at the poles\ncompared to the equator.
199932
The earth's rotation.
85444
Earth rotates. Sun on one side.