If gravity is what holding the planet together. How did gravity came to be in the first place? Can we visualise gravity? Can gravity be increased or decreased? If a planet is destroyed into chunks, will gravity holds the broken planet together?
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Based on our current understanding Gravity is a warping of spacetime
Gravity is not a force like Magnetism, or an exchange of particles, it is the warping of space itself.
Imagine a trampoline, now place a bowling ball in the center. This warps the material of the trampoline. Now roll a tennis ball beside it and the ball will follow the curvature of the material.
This is one of the ways we can visualize what is going on with gravity, but gravity affects spacetime in 4 dimensions not just two.
Gravity appears to be directly related to mass, as the greater the mass of an object, the more gravity it has.
Gravity is also the only force we know of that can affect space over very vast distances and accumulates rather than cancelling out.
>If gravity is what holding the planet together. How did gravity came to be in the first place?
The mutual attraction of smaller particles caused them to attract and combine. At that scale static electricity would have been more important as it was stronger than gravity. But as these masses crew to asteroid size they started affecting one another gravitationally more and more until they merged into planets.
>Can we visualise gravity?
See above
>Can gravity be increased or decreased?
Yes, it is directly proportional to the mass of an object
We do not currently have a way to modify gravity with technology
>If a planet is destroyed into chunks, will gravity holds the broken planet together?
It can, it depends on how much energy was involved in the explosion.
For example the Moon was formed when the early Earth was struck by a Mars sized object.
Gravity was strong enough to not only hold Earth together but to keep most of the material in orbit until it’s own gravity formed the moon
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