Why G is known as universal gravitational constant?

Explanation

To understand why G is known as the universal gravitational constant, we can break down the explanation into several steps:

### Step 1: Understanding Newton's Law of Gravitation
Newton's law of gravitation states that every point mass 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 their centers.

### Step 2: Mathematical Representation
The gravitational force \( F_g \) can be expressed mathematically as:
\[
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