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Does anyone have the guts to think that gravity is not the universal force that holds planets and stars in place? I mean, gravity is an attractive force, but is there more than one force than just gravity that holds the universe toghether?
I dod not ask because I did not think gravity was the force that holds all stars. I asked because I read this article along time ago about astrophysics, where two astrophysicists from India had recently found a force that proves that gravity was not the force that holds planets and stars in orbit, at least the stars. I don't know what to believe so I came to ask here. Here's the address...vincentm said:i dont exactly now what you are trying to get at, as far as planet and stars, comets, and other celestial objects, well basicaly there orbits and postitions. then yes Gravity is the only thing holding them in their respective places/locations however that place is also not said to be infinite. gravity pulls, repels, and astonomers have been sing examples of that for a long long time.
And that is exactly why I despise online crackpots. When the scientific community rejects them, they hawk their theories to laymen who don't know any better. I like to think that one of the main purposes of science is to give the general public an understanding of the universe in which they live. It's much more difficult to do that over top of a background of self-obsessed incompetents with inordinate amounts of free time. Admittedly, real scientists could put more effort into spreading real science, but that's no excuse for the crazies. It is possible that some enthusiastic fringe researcher will come up with a ground-breaking idea, but they should always go through official channels first. If it's right, experiment will eventually demonstrate that fact and the theory will be accepted. Only then is it ok, IMO, to start hawking it as "truth".modeman said:Thanks for the help, guys. I would not know what to believe without your help.
Smut said:All books can be indecent books, Though recent books are bolder
For filth, I'm glad to say, is in the mind of the beholder
When correctly viewed, everything is lewd!
I could tell you things about Peter Pan,
And the Wizard of Oz, there's a dirty old man.
And THAT is why I like PhysicsForums!SpaceTiger said:And that is exactly why I despise online crackpots. When the scientific community rejects them, they hawk their theories to laymen who don't know any better. I like to think that one of the main purposes of science is to give the general public an understanding of the universe in which they live.
Except, of course, in the occasional paid advertisment :-(.DrChinese said:And THAT is why I like PhysicsForums!
And I am especially glad that the same crackpots cannot peddle their wares here.
okay...let's look at what you're saying.modeman said:Does anyone have the guts to think that gravity is not the universal force that holds planets and stars in place? I mean, gravity is an attractive force, but is there more than one force than just gravity that holds the universe toghether?
Yes, that's (trivially) true. And what was your point in saying it?gravity between two any objects in any spot can be calculated by
m*g= G *m1*m2/d^2
m*g is the force of gravity. it is always the mass of the object times the gravitational constant, and it's also called weight.
it is equal to G which is a constant 6.67*10^-11 * mass of one object * mass of second object divided by the distance between the two Squared.
it can be derivated endlessly for speed, time acceleration, whatever you need but basically you can calculate the force with which a dust particle on pluto attracts the black hole across the universe. according to newton's third law the force that one attracts the other is reciprocal. (opposite and equal).
One corollary to this is that you (a person, any person) can refer folk with interesting questions to PF, knowing that:DrChinese said:And THAT is why I like PhysicsForums!
And I am especially glad that the same crackpots cannot peddle their wares here.
Did they forget about the existence of gravitationally bound binary stars?modeman said:I dod not ask because I did not think gravity was the force that holds all stars. I asked because I read this article along time ago about astrophysics, where two astrophysicists from India had recently found a force that proves that gravity was not the force that holds planets and stars in orbit, at least the stars. I don't know what to believe so I came to ask here. Here's the address...
http://www.zetatalk.com/usenet/use90089.htm
Like I said, I do not know what to believe, since we have Relativity as the current theory, so please tell me what you think.
adjkgh said:just a question i had in mind while reading everyone's comments.
is orbit stronger than gravity?
every planet has their own gravitational pull, some that are greater than others and yet none are crashing into each other. i know that another force in the opposite direction pulls it back into place so the planet stays in between but for example, the moon isn't flying off towards to the sun when the sun has a greater gravitational force than the earth. is it because the moon is in orbit around earth and that is why gravity is not strong enough to break that orbit?
Consider the anthropic principle applied to the solar system: since the solar system is roughly 5 billion years ago, any "crashing into each other" likely would have happened long ago. And, in fact, astronomers do believe that the solar system went through a "cosmic pinball machine" stage of development. But it is stable now because...after so long, it couldn't be anything but stable.adjkgh said:...and yet none are crashing into each other.
SpaceTiger said:And that is exactly why I despise online crackpots. When the scientific community rejects them, they hawk their theories to laymen who don't know any better. I like to think that one of the main purposes of science is to give the general public an understanding of the universe in which they live. It's much more difficult to do that over top of a background of self-obsessed incompetents with inordinate amounts of free time. Admittedly, real scientists could put more effort into spreading real science, but that's no excuse for the crazies. It is possible that some enthusiastic fringe researcher will come up with a ground-breaking idea, but they should always go through official channels first. If it's right, experiment will eventually demonstrate that fact and the theory will be accepted. Only then is it ok, IMO, to start hawking it as "truth".
Sorry for the rant (it's not directed at moderman), but this sort of thing irks me a lot. Perhaps I just foolishly hope that my work (and that of my fellow astronomers/astrophysicists) will actually contribute something to the world.
By whom? For what reason? Do you have evidence?Crazy8s said:...and without those rare people of brilliance who come across as crackpots at first, science would never have come to this high level of knowledge that it currently is. Every single person who offered substantial advancement in science was initially considered a "crackpot" or a "quack". Einstein, Tesla, DaVinci, Copernicus, Newton, and so, so many others.
This is inappropriate and displays poor judgement, if you ask me. You really don't know anything about me, so it's pretty arrogant to assume you understand my psychology. Also, your wording is interesting. What theories are you saying are not "fully functional"? How much do you know about these theories?Your obvious cynicism towards those who do not accept theories that are not fully functional, and offer new possibilities, truly shows that your own creative abilities are severely hampered.
It's pretty silly to compare a modern day internet message board to a time when people were being jailed and killed for their scientific beliefs. Also silly is your contention that Copernicus was ridiculed by his peers. In actuality, it was Copernicus himself who was hesitant to release his theory. His peers were the ones pushing him to publish. There were, of course, scientists who disagreed with him, but that's the case with any theory.It is a good thing that they worked hard to overcome the obstacles set before them by the very scientific institution they wished to help advance.
How insane Copernicus must have looked to all of his peers when he boldy stated that Earth was not the center of the universe... Shame on his peers for being so short sighted. Would you have laughed at his peers for being so cynical towards him?
And if you accept everyone with "crazy" ideas, you'll find yourself quickly becoming very confused. Again, it's very presumptuous of you (and wrong) to say that I only listen to theories with majority support.It would be a true statement to say that many of the people who have outlandish ideas could be considered so, but if you dismiss all who have such "crazy" ideas, you are selling short our ability to further our knowledge of our universe.