As far as i know earth’s orbis is stable.
If i understand it correctly it means that small perturbations in earth’s position or mass won’t change its orbit (like a spring effect that goes back to its rest state unless you break it), but if i simply balance out sun’s newtonian gravity vs the centrifugal force any little change would modify earth’s orbital speed and distance from the sun, so there’s something i’m missing, otherwise anytime a meteor hits or we send stuff to space we would be changing earth’s orbit.
So, IF my initial statement is correct, earth’s orbit doesn’t change for small perturbation, how do we know so? Secondly how big a perturbation would you need to change earth’s orbit?
On the other hand, if earth’s orbit changes with any minumum change, how big of a change in orbit would be needed for us to sebsibly perceive it?
Thanks
In: 4
If I understand you question correctly. The earth as it revolves around the sun isnt a perfect circle, so say the scientists at nasa. It’s more of an “elipse” it does get closer to the sun by a measurable distance a few million miles closer and the reverse it gets father away. The earth and its neighbor MARS often their orbits bring them very close together. I think if I remember correctly it’s why the long wait to try and land people on mars it’s better if it’s the closest to earth as possible.
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