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gravity is a force that pulls object toward each other
"gravity"
The forces of gravity always pull two objects toward each other.
The force of gravity attracts every pair of objects that have mass toward each other.
Theory of gravity
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Doppler shift
gravity is a force that pulls object toward each other
One is based on scientific data the other is based on the unproven.
The mass of the most objects is too small to cause a force large enough to notice. This is why you don't see the objects moving toward each other.
"gravity"
Gravity causes forces that attract every two objects in the universe toward each other.
The 'theory' of Universal Gravitation (gravity) states that there is mutual forcebetween every two masses. It says nothing about how, or whether, they move.The theory has now graduated to the status of a Law.
The Geocentric Theory states that the Earth is the center of the universe, and that all other objects orbit around it. The Heliocentric Theory states that the Sun is the center of the universe, and all other objects orbit around it. Of course, the Heliocentric Theory is correct, since all astronomical objects orbit around the Sun.
The forces of gravity always pull two objects toward each other.
The force of gravity attracts every pair of objects that have mass toward each other.