Massive objects bend space-time, causing smaller objects to follow curved paths. Gravity is the bending of space time
Gravitational time dilation
Time/clock moves slower in stronger gravitational fields (confirmed by atomic clocks in orbit).
Gravitational lensing
Light bends around massive objects, confirmed by observing stars near the sun during an eclipse.
Black holes
Extremely dense regions where gravity is so strong that even light cannot escape.
Expanding Universe
The theory provides the foundation for modern cosmology, including the big bang
Postulates
All laws of nature have the same form for observers in any frame preference whether it is accelerated or not.
In the vicinity of any point, a gravitational field is equivalent to an accelerated frame of reference in absence of gravitational effects.
Gravity attracts
Gravity is a special force that exist in the universe. It's like a pulling force that makes objects move towards each other. This means that if you drop an apple, it will fall down to the ground because gravity is pulling it towards the earth
Gravity is universal
The Universal Law of Gravitation is a rule that explains how gravity works in the entire universe.
The law says that every object in the universe, no matter how big or small, is attracted to every other object in the universe
Gravity is non-contact
Gravity is a force that exists between objects even if they are not touching each other
Gravity grounds
When we are standing on the ground, the force of gravity is pulling us down towards the center of the earth. This force is what keeps us on the ground