Euclidean Cosmology (EC) is introduced as an alternative framework to General Relativity (GR) and the ΛCDM model. EC retains Euclidean space and proposes that gravity is a residual effect of electromagnetism rather than a fundamental force. The theory replaces the standard expansion model with cyclic expansion and contraction phases governed by large-scale gravitational oscillations. The redshift in EC is explained through a combination of Dopplermotion and a refined tired-light mechanism. Time dilation and light deflection arise from neutrino scattering rather than space-time curvature, preserving a Euclidean structure.EC naturally explains the Cosmic Microwave Background (CMB) power spectrum without requiring inflation, aligns with observed large-scale structure, and provides a resolution to the Hubble tension within a non-expanding spaceframework. The theory predicts a self-regulating cosmic equilibrium maintained by an outer shell of the intergalactic medium, preventing energy loss and sustaining cyclic dynamics. The observed galactic rotation curves, large-scalefilament-and-void cosmic structures, and elemental recycling in Active Galactic Nuclei (AGN) are also consistent with the EC gravitational model.