Well, from science books i read the sun is 149,597,900 km from Planet Earth. I would like to know what types of forces puts the sun in a fixed position and if possible what does science put forward to explain the sources of these forces ?
Any one out there to give me facts so i can explain well to the children i teach at our school. Thanks.
There is no up and down in space. The people on the opposite side of the earth see up and down differently from you. So up and down depends on where a person is on the earth. Imagine that everything in space is like dust floating in air -but there is no up or down, so there is nowhere to fall.
The earth spins very fast, but we don't fall off because the earth's gravity pulls on us and keeps us in place. When something falls, it is just gravity pulling it. The earth revolves around the sun - like a stone on a string - because the gravity of the sun keeps it from shooting off into space. If the string breaks, the stone will fly away.
The sun cannot fall, unless a larger sun comes close to it and pulls it with its own, greater gravity. The earth cannot fall toward the sun because we are moving too fast - like the rock on a string.
Hope this helps.
Another useful image:
From the wiki page "Orbit". This demonstrates the two primary forces at work in maintaining a stable orbital motion.
Thanks for that informative illustrative answer.
Thanks Caroline for the elaboration.