We're not going to write an essay for you. That's cheating and it's wrong. However, we will be happy to answer any individual questions you may have that will help YOU write your own essay. We need to know what discoveries you're talking about, though...
The present participle of "understand" is "understanding."
Yes, gravity is present on the moon. However, the gravity on the moon is about 1/6th that of Earth's gravity. This is why objects and people weigh less on the moon compared to Earth.
Yes, there is.
It is present everywhere.
The pull of gravity.
Gravity is a fundamental force of nature that exists throughout the universe and is constantly acting upon objects with mass. It does not need to be "found" as it is always present. Scientists study, understand, and quantify gravity to explain how objects are attracted to each other and how celestial bodies interact in space.
I think you should master basic English before trying Physics.
Yes, there is gravity at the center of the Earth. The force of gravity is present throughout the entire planet, including at its core.
Yes, there is gravity in the center of the Earth. The force of gravity is present throughout the entire Earth, including its center.
The present tense of "understood" is "understand."
Yes. Without the gravity, we wouldn't be able to land on the ground after we jump.
It is not the most common force. All the physical forces are present thorough the universe and all are equal and required for the universe to exist. You obviously want to know something specific about gravity but for us to understand what you want you will have to ask your question in a more specific manner.