Creation & EvolutionForum for the discussion of this important topic. This forum is open to non-believers. There is a Christians-only forum in the Christians-only section too.
the moon is closer to the sun then pluto, yet pluto is kept in suns orbit and the moon isnt???
*groan*
i didnt explain well.. or you woulda got it
then if astronauts were to leave earth and go into space shouldnt they orbit the shuttle?? or shouldnt they technically orbit the sun?
they are
but they are closer to another gravitational feild.. the Earths.. which is stronger than the suns - though the sun does have some force.
i think (from classes long ago)... that gravity is known as a weak force. It is strong very close to the source but gets a lot weaker as you move a distance a way.
and yes - objects do have attraction to each other.
Are you sure your not dad?
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Oh, cut the bleeding heart crap, will ya? We've all got our switches, lights, and knobs to deal with, Striker. I mean, down here there are literally hundreds and thousands of blinking, beeping, and flashing lights, blinking and beeping and flashing - they're *flashing* and they're *beeping*. I can't stand it anymore! They're *blinking* and *beeping* and *flashing*! Why doesn't somebody pull the plug!
Key point is r^2, power of gravity drops off at the inverse squared of the distance. Use this formula and it'll solve all your questions.
ROFL!! he has the better answer.
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Oh, cut the bleeding heart crap, will ya? We've all got our switches, lights, and knobs to deal with, Striker. I mean, down here there are literally hundreds and thousands of blinking, beeping, and flashing lights, blinking and beeping and flashing - they're *flashing* and they're *beeping*. I can't stand it anymore! They're *blinking* and *beeping* and *flashing*! Why doesn't somebody pull the plug!
Key point is r^2, power of gravity drops off at the inverse squared of the distance. Use this formula and it'll solve all your questions.
that formula explains nothing
who made it? why is it in that order? who put it in that order? who decided what should be included into it??? how can it be sicentifically tested??? hmmmm
*sigh* I'll treat this as a series of questions from a 12-year old who has never taken a science class.
Originally Posted by AngryNotice
number 1. the way gravity reads, scientists have you think that objects of larger mass would have more of a gravitational pull then objects of smaller mass. so tell me how this makes sense
when we look at the sun we see the earth orbiting the sun, and the moon obriting the earth. if gravity were true, shouldnt our moon be orbiting the sun??? oh better yet, how come a planet way out in the distance such as neptune will orbit the sun, yet its moons will not orbit the sun??? something is wrong here, even at thise immense distances the moons will orbit the planets and not the sun, yet the suns "gravity" is strong enough supposedly to keep the planets in orbit.
The Moon DOES orbit the Sun. It goes around the Sun with the Earth along it's orbit. However, as the Earth is closer to the Moon than the Sun, it also orbits the Earth. Objects with mass have gravity; objects with more mass have more gravity. However, the force of gravity decreases as one over the distance squared (1/R^2), so if you move 2 meters away from the Sun, the force of gravity is lesser by a factor of 4. That's why the Earth appears to have more pull on the Moon than the Sun does - the Earth is closer. All planet's moons orbit the planet AND the Sun.
number 2. why is it, only planets have orbits?? you could put a space shuttle in outter space and a astronaut will not orbit it. you could put the smallest pebbble into outter space and it will not orbit the space shuttle. why is this???? if gravity were true then surely such small objects would orbit larger ones, especially in space
See above. The space shuttle has very little mass compared to the Earth, plus it's usually pretty close to the Earth.
number 3. on earth we see things that defy "gravity" on a daily basis. birds and airplanes for example. are you going to tell me that the gravity of the sun is strong enough to keep PLUTo in orbit but not an airplane or a little bird??????
Birds and planes do not defy gravity. Go to wikipedia and look up
'Bernouli's Principle'.
number 4. scientists dont know how gravity works. or what it really is, and even then we see anaomolies in space that defy gravity
We're working on it. It's easier to work on things when your budget isn't constantly getting cut to pieces and your spacecraft mothballed. But we do have a very good understanding of how gravity works (see above), and solid ideas about how it might do that. But if you don't believe science on the subject of gravity, fine. Go jump off a building and let us know how it went.
Oh, and find us some 'anomilies in space' that defy gravity while you're at it, because I don't remember hearing about them. Black holes don't count - we understand those.
so my point is that gravity(like other scientifist "tHeories" is very on shaky grounds. it doesnt have the evidnece to back it up, and when examined critically it falls under the pressure(no pun intended )
how do you evolutionsts explain gravity???
Just because you don't have any idea what you're talking about doesn't mean it can't be true. Try taking a physics class. And while you're at it, you may want to look up the difference between evolution and physics - evolution does not encompass all of science, and is in no way expected to explain gravitational theory.
who made it? why is it in that order? who put it in that order? who decided what should be included into it??? how can it be sicentifically tested??? hmmmm
Really? Have you tried it? My guess is you know nothing about the formula. It's really simple, Gm is the gravitational constant, M1 is the mass of the first object, M2 is the mass of the second object, and r is the distance between the ojbect. As for how it can be tested, let's start by the thousands of experiments that use it every day. The who's and why's doesn't matter as much, since it'll go right over your head.
Like I said, if you plug in your numbers into the formula, it'll show why the Moon orbits the Earth rather than the Sun. Fun bet, how many people actually think AngryNotice will actually apply the formula?
who made it? why is it in that order? who put it in that order? who decided what should be included into it??? how can it be sicentifically tested??? hmmmm
That forumla explains everything you will need to know about gravity. It is based on observation, put together by Newton. It can be easily tested, and IS easily tested in high school physics labs across the country. Don't worry, you'll get to take high school physics eventually.
Hm, I´m not sure if a serious response to this is appropriate, but if we don´t give one, we shouldn´t be surprised if we are not taken serious.
AN, I don´t know how much knowledge about the basics of Physics you have, so I try to keep that simple. If you need further detailed informations, I´ll try to brush up my formulas and maths.
The physical effect of gravity is a force. "Force" in Physics is something that sets objects in motion. If a force is exerted on an object, it will start to acclerate, as long as the force is present.
Now gravity is an attractive force exerted by all physical objects that posses mass. The greater the mass, the greater the force.
On the other hand, the force gets lesser with distance - in fact with the distance squared.
The garvitational force between two objects can be calculated by the formula: Force = Mass1 * Mass2 * Distance ^ -2 (*a constant to get the scale right)
So, to start with your questions, the force between two objects will depend a lot on the distance.
The mass of the sun might be a lot higher than the mass of earth and moon.... but it is also a lot farther away. It is so much farther away that the force of gravity between earth and moon is higher than between moon and sun.
That is the reason why the moon orbits earth, and not the sun.
(A sidenote: gravity is a force between two objects. In the same way as the earth attracts the moon, the moon attracts the earth. So in reality, both objects orbit the common center of mass. As the mass of the earth is a lot greater than that of the moon, this common center of mass is way inside the earth.
So it is justified to state "the moon orbits earth", even if it is not completly correct physically.)
Your second question: why do only planets have orbits? Well, they don´t. You will have noticed that humans have put satelites into orbits around earth. This is an application of gravitational mechanics.
Question 3: I´m not sure how you think birds and airplanes defy gravity.... do you meant because they don´t fall to the ground or because they don´t start to orbit earth?
Both can be easily answered. Flying things stay aloft, because they exert a force that counters the force of gravity.
Imagine it as a kind of rope-pulling game. If both teams pull with the same force, they won´t move, no matter how hard they are pulling. Now switch that analogy to the vertical.
But why don´t they go into orbit?
Orbits are a very special case of gravitational mechanics. It has a lot to do with the right speed whether a flying object will leave the earth, orbit it, or fall back to the ground. Again, the wise man from NASA and such organisations have worked this out quite well when they are launching their rockets.
number 4. scientists dont know how gravity works. or what it really is, and even then we see anaomolies in space that defy gravity
That is only partially correct. Scientists do know quite well how gravity works. What it really IS is another question, and that is indeed still not answered to satisfaction. But that doesn´t keep gravity from working, being observed and calculated.
show me a pebble that orbits a mountain or a bird that orbits the earth and then gravity will make sense. or better yet just show me how gravity works(if it works at all) and then maybe it will be more than just a theory
Pebbles won´t orbit mountains nor birds earth. The mathematics to show why is rather simple.
I hope I have answered your questions. If you still have some, don´t hesitate to ask.
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Who was the Creationist that thought gravity or magnitism was wrong since airplanes could fly, but they were made of metal? Also, why is it only evolutionists that correct these mistakes? This is just more evidence that Creationists are more likley to be ignorant in areas of science.
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