hi guys,
i have a very limited knowledge of physics, and have an engineering background.
but i saw on a program i was watching yesterday about the solar system, one of the comments made on there was about how newton's equation for gravity was what was used to find "neptune??"
however it worked for all of the other planets but mercury, it said that it was something to do with once we look at the fact gravity is not just a force that attract but bends spacetime itsself then this solves the orbit of mercury mystery...
i have looked on the internet and on youtube but i find the same answer everywhere... "it just does" ive looked at a few equations and the ones i could comprehend appear to mea that if the mass of a plant warps space time it warps it the same amount as Newton's equation f=g*(m1m2/r^2)
also i dont want to jump out of my league to much but if some one could explain in laymens terms that would be cool
my understanding is if we was at the near the centre of the earth (aside from being crushed by the immence pressue) we would actually be ripped apart by gravity as it is much stronger nearer the earth core than it is on its surface... if this is the case then is gravity not more related to density than mass... and how do you define the mass of a planet, is it the planet as a whole then the distance from its surface, just cos my thought was that if you went to jupiter and started falling through the planet as you get nearer the center the mass under you is lower as gravity would reduce...
and that doesn't make sense to me, i assume its wrong but why ??
thanks guys
i have a very limited knowledge of physics, and have an engineering background.
but i saw on a program i was watching yesterday about the solar system, one of the comments made on there was about how newton's equation for gravity was what was used to find "neptune??"
however it worked for all of the other planets but mercury, it said that it was something to do with once we look at the fact gravity is not just a force that attract but bends spacetime itsself then this solves the orbit of mercury mystery...
i have looked on the internet and on youtube but i find the same answer everywhere... "it just does" ive looked at a few equations and the ones i could comprehend appear to mea that if the mass of a plant warps space time it warps it the same amount as Newton's equation f=g*(m1m2/r^2)
also i dont want to jump out of my league to much but if some one could explain in laymens terms that would be cool
my understanding is if we was at the near the centre of the earth (aside from being crushed by the immence pressue) we would actually be ripped apart by gravity as it is much stronger nearer the earth core than it is on its surface... if this is the case then is gravity not more related to density than mass... and how do you define the mass of a planet, is it the planet as a whole then the distance from its surface, just cos my thought was that if you went to jupiter and started falling through the planet as you get nearer the center the mass under you is lower as gravity would reduce...
and that doesn't make sense to me, i assume its wrong but why ??
thanks guys
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