Understanding Our Universe: Current Status and Open Issues
T. Padmanabhan
TL;DR
This paper reviews the current state of cosmology, highlighting key discoveries, conceptual challenges, and open questions related to the universe's composition, structure formation, and fundamental physics.
Contribution
It critically examines recent developments in cosmology, emphasizing unresolved issues and conceptual debates in understanding the universe's nature and evolution.
Findings
Confirmation of the standard cosmological model
Identification of the universe's mysterious composition
Discussion of open questions in structure formation and dark energy
Abstract
Last couple of decades have been the golden age for cosmology. High quality data confirmed the broad paradigm of standard cosmology but have thrusted upon us a preposterous composition for the universe which defies any simple explanation, thereby posing probably the greatest challenge theoretical physics has ever faced. Several aspects of these developments are critically reviewed, concentrating on conceptual issues and open questions. [Topics discussed include: Cosmological Paradigm, Growth of structures in the universe, Inflation and generation of initial perturbations, Temperature anisotropies of the CMBR, Dark energy, Cosmological Constant, Deeper issues in cosmology.]
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