We know our Earth is sphere and we are all living on the surface of Earth. We often say that we are living inside the Earth. We thought that we are in the bottom half of the Earth and the sky is in the top half but it is not correct. We are all existing on the outer surface of the Earth's curvature.
Here two doubts arise- firstly, 'why do we not fall into space ?' and secondly, 'why do we not feel that we are walking on the bulging, outer- curve surface of the Earth?'
Here the answers lie which clear our doubts.
We do not fall because we are all attracted by the Earth's centre of mass which is enormous i.e., gravity is the factor which hold us all around on the surface of the Earth.
Before giving the answer of second question, imagine the Earth as a huge football and an ant moving on the outer surface of it. On comparing the size we find a huge difference between their sizes. The ant will feel that she is moving on a flat surface but we can see it moving on a round path.
Similarly we are also living on the surface of Earth, and our size is so small like the ant that we can not feel the curve of the Earth. By zooming the below picture we can find our flat surface where we are living.
We can only conceive the Earth surface as a flat land where we are living. We are so small and the Earth is so big that we do not perceive the roundness of the Earth on human scale that is very small. Earth's surface curves eight inches in one mile. This curve is too small to perceive the roundness of our planet. To see the arc or the curvature of the Earth we have to observe a big object on a large scale.
The best example is to observe the sailing off ship away from the observer. With going far, the ship is appearing to sink gradually into the water because it is gradually hidden by the Earth's curvature.
Here two doubts arise- firstly, 'why do we not fall into space ?' and secondly, 'why do we not feel that we are walking on the bulging, outer- curve surface of the Earth?'
Here the answers lie which clear our doubts.
We do not fall because we are all attracted by the Earth's centre of mass which is enormous i.e., gravity is the factor which hold us all around on the surface of the Earth.
Before giving the answer of second question, imagine the Earth as a huge football and an ant moving on the outer surface of it. On comparing the size we find a huge difference between their sizes. The ant will feel that she is moving on a flat surface but we can see it moving on a round path.
Similarly we are also living on the surface of Earth, and our size is so small like the ant that we can not feel the curve of the Earth. By zooming the below picture we can find our flat surface where we are living.
We can only conceive the Earth surface as a flat land where we are living. We are so small and the Earth is so big that we do not perceive the roundness of the Earth on human scale that is very small. Earth's surface curves eight inches in one mile. This curve is too small to perceive the roundness of our planet. To see the arc or the curvature of the Earth we have to observe a big object on a large scale.
The best example is to observe the sailing off ship away from the observer. With going far, the ship is appearing to sink gradually into the water because it is gradually hidden by the Earth's curvature.
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