Dear Jamil Kooli

If we seek a frame of reference for the universe beyond Einstein’s relativistic framework, we must consider an absolute or emergent structure that underlies spacetime itself. General relativity describes how mass and energy shape spacetime locally but does not provide a universal "rest frame" or a preferred perspective. However, quantum gravity, string theory, or causal set theory suggest that spacetime might emerge from more fundamental, discrete, or holographic structures. If a deeper frame exists, it might be rooted in the quantum vacuum, the entanglement network of the universe, or a cosmic-scale ordering principle yet to be discovered. This would challenge our notions of relativity and potentially redefine inertia, causality, and even time itself.

I hope this helps.