The gravitational field at a point in space equals the gravitational force experienced by a test particle placed at that point divided by the mass of the test particle. Note that the presence of the test particle is not necessary for the filed to exist -- the Earth creates the gravitational...
The gravitational force is independent of the intervening medium. In other words, the force between two masses remains the same whether they are in air, vacuum, water or separated by a brick wall. Hence (a) is an incorrect statement. The gravitational fo
The geoid is defined as the height of the equipotential surface of the Earth's gravity field with most closely corresponds to mean sea level. The acceleration of gravity on this surface is everywhere the same. Because the ocean is a fluid, it adjusts itself to conform to the geoid, with ...
In a test of the method delineated in the first paper, we compute the conservative part of the self-force for a particle in circular orbit around a Schwarzschild black hole. The gauge vector relating our radiation gauge to a Lorenz gauge is helically symmetric, implying that the quantity huu...
Searching for gravitational lenses in modern wide-field, deep, multi-band imaging datasets is well suited to citizen science. Space Warps (Marshall et al. 2016) was the first citizen science project designed specifically to discover strong lenses from astronomical imaging surveys. The classification ...
The recent discovery of gravitational waves is often seen as the confirmation of a prediction Einstein made one century ago. We argue instead that only after conceptual advances in general relativity between the mid-1950s and the early 1960s could such a
The reason is that gravity becomes weaker if there are more dimensions because there is more space for the gravitational field to escape. There is a particular energy and angular distribution of the produced gravitons that arise from the distribution in mass of KK states of spin-2. This can ...
⇒ Also, Check:Gravitational field intensity History of Gravitational Theory Ptolemy proposed the geocentric model, which failed to understand planetary motions, and led to the development of the heliocentric model by Nicholas Copernicus. His idea is based on the rotation of a test mass around the...
Gravitational potential energy (GPE) is an important physical concept that describes the energy something possesses due to its position in a gravitational field. The GPE formula GPE = mgh shows that it depends on the mass of the object, the acceleration
earth's gravitational fieldNew studies on the influence of inter-satellite range on the accuracy of the Earth's gravitational field recovery were carried out based on the Inter-satellite Range Interpolation Method (IRIM). Firstly, the IRIM observation equation by introducing the precise inter-...