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  • GRAVITY IS THE INTERACTION OF MATTER AND ENERGY WITH THE GEOMETRY OF  SPACE AND TIME.  
  • E=mc2 describes gravity not as a force, but as a consequence of the curvature of spacetime caused by the uneven distribution of mass.
  • Gravity is strongest at the Earth’s surface, and its weakest at the Earth’s core.  Sri Lanka has the lowest gravity on Earth. Gravity is a force of attraction that exists between any two masses, any two bodies, any two particles. Gravity is not just the attraction between objects and the Earth. It is an attraction that exists between all objects, everywhere in the universe.
  • Matter tells spacetime how to curve.
  • Matter in motion causes spacetime to curve in a different way.  It twists the fabric of spacetime.
  •   THE GRAVITY OF A PLANET DOESN’T DEPEND ON HOW IT IS MOVING.  THE FORCES
  • EXERTED ON MASSES ACTING BETWEEN BODIES DOMINATE.
  • Gravity causes every object to pull every other object toward it. Some people think that there is no gravity in space. In fact, a small amount of gravity can be found everywhere in spaceGravity is what holds the moon in orbit around Earth
  • Gravity is generated by variations in the curvature of spacetime— the three dimensions of space plus time— which bend around any object that has mass. Gravity from Earth reaches the International Space Station, 400 kilometers above the earth, with almost its original intensity
  • Matter tells spacetime how to curve.
  • Gravitational waves are caused by star explosions and collisions. Those changes around masses spread outward as gravitational waves.
  • A gravitational wave is a traveling disturbance in the curvature of spacetime.  Within the wave, there is only empty space. It is a moving change in the geometry of space.
  • The waves are ripples in empty space time that move at the speed of light. They change the  geometry of space locally. A collision of two neutron stars or two black holes are needed to detect gravitational waves. (given the current detection devices.)
  • Do gravitational waves carry energy?  Yes, they carry energy.  The experimental proof is in place.  A binary pulsar star system was tested.  Their rotation was giving off a seventeen times a second radio signal.  They rotate every 71/2 hours.  The gravitational waves they generate causes a loss of energy, over time.
  • In empty space, electric and magnetic fields have rich physics of their own.  They have electromagnetic waves.  They are traveling disturbances of electromagnetic fields that are moving at the speed of light through empty space.
  • A free body moves at a uniform speed.as a result of gravitational force.
  • Inertia and gravity are related.
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