@article{El-Mongy_2022, title={A Theory for Galaxy Formation: Innovative Model for Evolution of Galaxies as a Function in the Initial Cloud 2π and 4π Geometry and Acceleration}, volume={20}, url={https://rajpub.com/index.php/jap/article/view/9280}, DOI={10.24297/jap.v20i.9280}, abstractNote={<p><span style="font-weight: 400;">The</span><strong> Big Bang idea </strong><span style="font-weight: 400;">is referred in the</span><strong> glorious Quran. </strong><span style="font-weight: 400;">As a matter of fact, there is no single integrated model describing the formation of all type of the galaxies. This work proposes a new theory and equations describing the controlling conditions and parameters of stars and galaxies formation. The derived equation called, Sayed`s galaxy formation formula </span><strong>(SGFF)</strong><span style="font-weight: 400;">, shows that the formation of the major disk (spiral) and elliptical galaxies is correlated to the 2π and 4π geometry of the initial cloud. Sayed`s temperature (Ts) , pressure (Ps) and radius (Rs) are among the effective parameters of galaxies formation. The mass of galaxy (Sayed`s galaxy mass formula- SGME) was also deduced based on acceleration and expansion and given as a new formula. The formulas were validated and verified by check of the units and comparison with the declared values. The minimum mass (0.0774M</span><span style="font-weight: 400;">ʘ</span><span style="font-weight: 400;">) for star formation was calculated and found to be fully matched with the reference range; 0.075 – 0.08 solar mass, for 4π geometry. The gas halo </span><span style="font-weight: 400;">mass</span><span style="font-weight: 400;"> of the Milky Way was calculated with ~2 % discrepancy. Our previous article; Dark matter-energy to Hydrogen-helium ratio should be considered in galaxy formation mechanism and calculation.</span></p>}, journal={JOURNAL OF ADVANCES IN PHYSICS}, author={El-Mongy, Sayed}, year={2022}, month={Sep.}, pages={192–300} }