Here's why:
* Newton's Law of Universal Gravitation: This law states that every object in the universe attracts every other object with a force proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
* Distance and Gravity: As the distance between two objects increases, the gravitational force between them decreases, but it never reaches zero.
* No "Edge" to Gravity: There is no specific height or distance where gravity suddenly disappears. It just gets incredibly weak.
Practical Implications:
* Earth's Atmosphere: The Earth's atmosphere is held in place by gravity, but the atmosphere gradually thins out with altitude. There is no distinct "edge" to the atmosphere.
* Space: While gravity is very weak in space, it's still present. Satellites and other objects in orbit are constantly falling towards Earth, but their sideways motion prevents them from crashing.
Key Takeaway:
Gravity is a fundamental force that extends infinitely. It may become extremely weak at great distances, but it never completely vanishes.
