**On The Natural Philosophy Origin of Gravitational Force by Applying Spacetime Entanglement Entropy and the Unruh Effect**

We contemplate the thermodynamical origin of the attraction of matter by applying the spacetime trap entropy and therefore the Unruh impact originating from vacuum quantum fluctuations. By analyzing each the native equilibrium and quasi-static processes of a system, we have a tendency to could get each the magnitude and direction of Newton’s attraction in our theoretical model. Our work shows the likelihood that the elusive Unruh impact has already shown its manifestation through attraction. **[1]**

**GRACE accelerometer calibration by high precision non-gravitational force modeling**

The precise modeling and information of non-gravitational forces working on satellites is of huge interest to several scientific tasks and missions. Since 2002, the dual GRACE satellites have measured these forces in an exceedingly low Earth orbitwith extremely precise accelerometers, for regarding 15 years. Besides the importance for the GRACE mission, these measure information enable the analysis of modeling approaches and therefore the improvement of force models. sadly, before any scientific usage, the measuring instrument measurements must be tag, particularly multiplier factor and bias must be often calculable. **[2]**

**Eruptive Instability of the Magnetic-Flux Rope: Gravitational Force and Mass-Unloading**

Based on the Kuperus–Raadu filament model, we have a tendency to analyze the vertical stability of a magnetic-flux rope as an entire, taking under consideration the attraction and mass-unloading. we have a tendency to use the small-perturbation methodology to see conditions of the eruptive instability caused by vertical displacements. it’s been shown that the higher limit of the magnetic-field decay index describing the flux-rope stability will increase with a rise of its mass. The decrease of the flux-rope mass results in activation and later eruption of the filament. potential mechanisms of the solar-filament destabilization are mentioned. **[3]**

**Circumnutation observed without a significant gravitational force in spaceflight**

For over [*fr1] a century and particularly since the 1960’s variety of plant physiologists, seeking to elucidate the imposingly present mechanism that drives and regulates circumnutation all told growing plant organs, are unable to agree on whether or not the differential growth method that results in circumnutational oscillations is gravity dependent. There has been fairly general agreement that the question may be answered, if take a look at plants can be bereft of all important gravitative stimuli as would be doable within the close to lightness or free fall atmosphere of satellite orbit. Such associate experiment was meted out throughout the Spacelab one mission. Circumnutational oscillations were discovered that incontestable that a drawn-out input of gravitative data from the atmosphere wasn’t needed for initiation or maintenance of circumnutation in flower hypocotyls. **[4]**

**The Graviton Field as the Source of Mass and Gravitational Force in the Modernized Le Sage’s Model**

The formula for the gravitation within a spherical body comes, furthermore as for the Newtonian force of attraction between bodies from the stance of the gravitons’ model. The parameters of the graviton field are calculable, together with its energy density, energy flux and therefore the cross section of interaction with matter. The equation comes, from that it follows that the body mass is proportional to the ability of radiation energy of the body from those of gauge boson that interacted with the matter and gave their momentum to the body. The conclusion is created supported the idea of infinite nesting of matter that gauge boson are generated the least bit matter levels by the densest objects like nucleons and nucleon stars. **[5]**

** ****Reference**

**[1]** Liu, S. and Xiong, H., 2019. On the Thermodynamic Origin of Gravitational Force by Applying Spacetime Entanglement Entropy and the Unruh Effect. *Entropy*, *21*(3), p.296. (Web Link)

**[2]** Wöske, F., Kato, T., Rievers, B. and List, M., 2019. GRACE accelerometer calibration by high precision non-gravitational force modeling. *Advances in Space Research*, *63*(3), pp.1318-1335. (Web Link)

**[3]** Tsap, Y.T., Filippov, B.P. and Kopylova, Y.G., 2019. Eruptive Instability of the Magnetic-Flux Rope: Gravitational Force and Mass-Unloading. Solar Physics, 294(3), p.35. (Web Link)

**[4]** Circumnutation observed without a significant gravitational force in spaceflight

- AH Brown,
- DK Chapman

See all authors and affiliations

*Science * 13 Jul 1984:

Vol. 225, Issue 4658, pp. 230-232

DOI: 10.1126/science.11540799 (Web Link)

**[5] **The Graviton Field as the Source of Mass and Gravitational Force in the Modernized Le Sage’s Model

**Sergey G. Fedosin
**Sviazeva Str. 22-79, Perm, 614088, Perm Region, Perm State University, Russian Federation (Web Link)