On Mar 18, 2:58 pm, T Pagano <
not.va...@address.net> wrote:
> On Sun, 18 Mar 2012 08:26:13 -0400, Friar Broccoli <
elia...@gmail.com>
> wrote:
>
> >On Sat, 17 Mar 2012 16:10:51 -0400, T Pagano <
not.va...@address.net>
> >wrote:
>
> >>On Sat, 17 Mar 2012 13:45:47 -0400, Friar Broccoli <
elia...@gmail.com>
> >>wrote:
>
> >>>On Sat, 17 Mar 2012 13:31:40 -0400, T Pagano <
not.va...@address.net>
> >>>wrote:
>
> snip for brevity
>
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> >>Nice try, but not quite good enough.
>
> > .
>
> >>1. Broccoli hasn't proved that Earth is, necessarily, part of the
> >>same local system as the Sun and the eight other planets. He has
> >>assumed it.
>
> >Please read what I said - I assumed/said no such thing. The eight other
> >planets are demonstrating that they are part of a single (rotating
> >gravitationally bound) system centered around a location near the sun.
> >> Which means he's assumed that the Earth translates around
> >> the Sun and NOT proved it.
>
> >Again:
> >Since eight (or seven) other planets orbit the "center of mass" (near
> >the sun) it follows necessarily that the earth (not only may) but must
> >also orbit the sun.
>
> The fact that Saturn's moons and Earth's moon don't obey this
> necessity is a falsification of Friar Broccoli's nonsensical (and NON
> Newtonian) claim.
Wow. You have no feel for physics at all, do you?
Firstly, Saturn's moons and Earth's moon do in fact orbit the Sun, as
part of their respective planet-moon systems. Just as I orbit the Sun
as a consequence of being held by gravity to the Earth. I would
continue to orbit the Sun, albeit with slightly increased variability,
if I were on the International space station.
> Further below this idiot refutes his own
> "necessity" by admitting that it "is" possible for a body to be a part
> of another system. This collapses everything.
How?
> But let's continue to
> show that Broccoli's nonsensical rule above has nothing whatsoever to
> do with Newton's Laws.
>
> ***************************************************
> NEWTON'S LAWS:
> I. (Law of Motion 1) Every object in a state of uniform motion
> tends to remain in that state of motion unless an external force is
> applied to it. Every object at rest stays at rest unless acted upon
> by an external force.
> 2. (Law of Motion 2) The acceleration a of a body is parallel and
> directly proportional to the net force F and inversely proportional to
> the mass m, i.e., F = ma.
Let's pay particular attention to that one. Under what circumstances
could an object be stationary?
> 3. (Law of Motion 3) For every action there is an equal and opposite
> reaction.
> 4. (Law of Gravitation) Every point mass in the universe attracts
> every other point mass with a force that is directly proportional to
> the product of their masses and inversely proportional to the square
> of the distance between them.
Let's also pay close attention to the second clause of the sentence
above.
> ***************************************************
>
> Newton's Laws of Motion (1), (2), and (3) provide necessity of motion
> of a particular body only after one has knowledge of whether the body
> is actually moving.
Incorrect. A body acted on by a non-zero net force must undergo
acceleration. And a body undergoing acceleration cannot be
stationary.
Broccoli hasn't proved the Earth is moving but
> assumed it. His above nonsensical, non Newtonian rule of necessity
> canNOT be derived from any of these.
>
> Newton's Law of Gravitation explains gravity as an attractive force
> along the lines between the centers of mass between EVERY BODY in the
> ENTIRE UNIVERSE.
Here's where you forget the second clause of the sentence you quoted
"...and inversely proportional to the square of the distance between
them". The Andromeda Galaxy has a heck of a lot of mass, yet I don't
worry about being sucked up into the sky when it's overhead.
Let's think about that a bit. Force causes acceleration. Acceleration
is commonly thought of as speeding up or slowing down, but it also
refers to a change of direction. In the absence of gravitational
forces, the Earth would either be stationary or travel in a straight
line. Gravitational forces from various bodies alter that course,
"curving" it.
Now let's consider the effect of "every body in the Universe", or a
few of them, anyway. I choose the Moon, the Sun and the Milky Way. The
Moon's mass is a tiny fraction of the Sun's, and the Sun's mass is a
tiny fraction of the Milky Way's. Yet the Moon causes a greater
deviation (tighter curvature) of the Earth trajectory than does the
Sun. And the Milky Way causes such a subtle curvature that our solar
system would take over 200 million years to make an orbit. I'm sure
that the other galaxies in our "neighborhood" must curve the
trajectory of the Milky Way as well, and the Solar System and the
Earth in turn, but to an even gentler degree.
That's because of distance. The puny gravitational force between the
Earth and my house keeps my house rooted where it is despite the
enormous masses found elsewhere. And as you never, ever address, the
mass necessary to balance the effect of the Sun simply cannot be
found. It's a sort of vicious cycle; the further away you go, the more
mass you need, but the more mass you try to include in the equation,
the further away it becomes, which requires more mass.
> This wouldn't explain the momentum of any of the
> other eight planets. And this law places few restrictions on what
> motions a body can have.
I have no idea what this means. Newton's laws do place pretty tight
restrictions on what sorts of motions objects can have, based on the
forces they encounter. I'd swear this rule is sometimes violated when
I drop a screw in my shop, but that's probably the less rational part
of my brain talking.
Likewise Broccoli can't derive his
> nonsensical, non Newtonian rule of necessity from this law.
>
> Finally Hubble observed that all the stars/galaxies that he could
> observe with his available tools are situated in spherical shells with
> earth at the center.
You keep repeating this. Even were this actually so (it isn't), the
bodies whose masses dominate the gravitational effect on the Earth
cannot remotely be described as being arrayed in "spheres".
> These are the most dense masses in the universe.
What are the most dense masses? And why would it matter?
> That is strong evidence that the earth lies at the center of mass of
> the universey and is completely immobile.
>
> snip
>
> >Planet/Lunar systems like those of Saturn and Jupiter are separate
> >gravitationally bound sub-systems. Each of those gravitationally bound
> >planetary sub-systems orbit the sun as a single unit.
>
> Here Broccoli contradicts his own nonsensical, NON Newtonian rule of
> necessity he uses above to prove that the Earth moves. If these moons
> fail to orbit the center of mass of the system offers then there is no
> necessity that any bodies do so.
But they do. A child on a ferris wheel circles around the wheel's
axle, around the Earth, around the Sun and Around the Milky Way.
Newton's laws were impotent to
> expalin how any body arrived at its initial position with its
> momentum.
The "initial" position of a body which formed over eons from dust and
gas is a poorly-defined concept. But more importantly, it's
irrelevant. If we are discussing the concept of a stationary Earth, we
only need consider that those bodies are in motion NOW and are arrayed
such that they exert an unbalanced and continually changing net force
on the Earth; a net force that no observable or conceivable set of
masses could precisely counteract.
According to Newton, if there is a net force on a body, then it must
accelerate. According to Newton, gravitational forces vary inversely
with the square of the distance. The enormous distances involved
guarantee that the masses within our solar system will dominate the
gravitational effect on the Earth. (it's simple math, really - try it
yourself). The masses within our solar system are demonstrably NOT
balanced in their effect on the Earth, and the mass to counteract that
(continually-varying) imbalance cannot be found elsewhere.
So either Newton was wrong or the Earth must move.