The article is filled with flaus:
"The theory of gravity violates common sense in many ways. Adherents have a hard time explaining, for instance, why airplanes do not fall. Since anti-gravity is rejected by the scientific establishment, they resort to lots of hand-waving. The theory, if taken seriously, implies that the default position for all airplanes is on the ground. While this is obviously true for Northwest airplanes (relying on “A Wing and a Prayer&rdquo
, it appears that Jet Blue and Southwest have a superior theory that effectively harnesses forces that overcome so-called gravity."
This person is under the impression anti-gravity is used to lift airplanes above the ground; this is utter rubbish. http://www.planetharold.com/images/physics/Airplane%20Wing.jpg
When air moves fast over airplane wings the air moves at a higher velocity under the wing than over the wing, causing a low pressure above the wing and a high pressure below; this in turn causes lift. Lift towards the low pressure because things generally move from high pressure to low pressure (take weather systems for example). The plane gains more of the force of lift than the force of gravity, thus making the plane rise into the air. The height of the plane then plateaus at some level because the forces of lift and gravity are balanced.
ALL PLANES WORK ON THIS PRINCIPLE
The writer of this article must be fool, they are under the impression that "anti-gravity" lets planes fly. It is not.
There are many other flaus, like the moon example:
"If the theory of gravity were true, it would show that the sun's gravitational force on the moon is much stronger than the earth's gravitational force on the moon, so the moon would go around the sun."
This is wrong again, gravity between objects gets weaker the further apart they are from each other. The moon orbits the earth far closer than to that of the sun and therefore the gravity between the earth and the moon is greater than that of the moon and the sun.
Here's another flau:
"Gravity totally fails to explain why Saturn has rings and Jupiter does not."
Jupiter does have rings, but they are smaller and less of them. They have sent probes and seen them.
Through a lack of understanding scientific ideas and lack of true research into what the author is talking about there are plenty of mistakes, errors and lies.