As of my last knowledge update in September 2021, there is no established scientific theory or technology that enables the direct manipulation or control of gravity. Gravity is a fundamental force of nature described by Albert Einstein's General Theory of Relativity. While there have been various theories and speculations about gravity control or manipulation, no practical methods or technologies have been demonstrated or widely accepted within the scientific community.
Measurement and instrumentation related to gravity primarily involve techniques for measuring the gravitational field, studying gravitational interactions, and making precise measurements for various scientific and engineering applications. These include:
Gravimeters: These are instruments used to measure the local gravitational field. They are often used in geophysics, mineral exploration, and other fields to detect variations in gravity that may indicate changes in the density of the Earth's subsurface.
Gravitational Wave Detectors: These instruments are designed to detect the ripples in spacetime caused by the acceleration of massive objects, such as colliding black holes or neutron stars. LIGO (Laser Interferometer Gravitational-Wave Observatory) is one such example.
Satellite-based Gravitational Measurements: Satellites equipped with precise instruments can measure the Earth's gravitational field variations from space, providing valuable data for geodesy, Earth science, and environmental monitoring.
Astronomical Observations: The study of the gravitational interactions between celestial bodies provides insights into the nature of gravity and the motion of objects in space.
It's important to note that while there is ongoing scientific research and exploration in the field of gravity, no technology or method for directly controlling or manipulating gravity is currently known to exist. If there have been any significant developments in this area since my last update, I would not be aware of them. It's advisable to consult more recent and authoritative sources to obtain the latest information on this topic.