They might do it when they are in a planet's orbit, but on space they use nuclear propulsion.
Gravity
because to get to space you have to overcome the pull of earths gravity
It isnt. Two different forces; gravity and magnetism. As for how gravity works; all objects have their own "gravity", the bigger they are, the more gravitational pull they have. Why gravity works; nobody knows or we would all have flying cars.
the pull of gravity on a camera is its weight
The force of gravity between the planets and the sun keeps them in orbit and prevents them from flying out of the solar system. The sun's gravitational pull keeps the planets in stable orbits around it.
Gravity is what keeps objects in orbit around a planet from flying off into space. The gravitational pull between the planet and the objects creates a centripetal force that balances the outward motion, keeping them in a stable orbit.
Black holes are hugely dense objects that nothing can control. Containing one as to change its properties to push and not pull is just impossible. Black holes are dense so they have a lot of gravity. That's the gravity that sucks stars, planets, and anything else in. To reverse its effect would be to reverse gravity, which is impossible in our universe. But as to your question. It could be done, just in a place where the laws of gravity are reversed.
They don't counteract it. Gravity is what causes it to orbit instead of flying off into space. When it's got just the right velocity, it orbits, neither flying off, nor falling back to the planet's surface.
The Newtons theory of Gravitational Forces would apply. ---------------------------------------------------------------- However you cannot change the downward direction of gravity on Earth. Everything is being pulled towards the centre of the Earth. It is true, however that the gravitational pull is strongest at the Earth's surface, and the pull is less atop a mountain or down a deep shaft of a mine.
Gravity is a pull from the earths core. it is known as a "force"
Weight is the measure of the pull of gravity. Weight is the mass of an object and can be measured by using a scale.
Were it not for the interaction of the Moon's gravity with the Earth's, it would not be there. Gravity keeps it in its orbit, as it does all celestial bodies. The moon's gravity also affects the Earth, causing the tides and geological stresses.