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Explore the expansion history of the universe and dark energy properties through this comprehensive lecture by Arman Shafieloo from the Korea Astronomy and Space Science Institute. Delve into the reconstruction of dark energy using the most recent cosmological observations, including DESI-2025 BAO (Baryon Acoustic Oscillations) observations, various supernova compilations, and Planck CMB (Cosmic Microwave Background) data. Examine both parametric and non-parametric reconstruction methods and their theoretical implications for understanding one of the most mysterious components of our universe. Gain insights into current observational techniques and analytical approaches used in modern physical cosmology to unravel the nature of dark energy and its role in cosmic expansion.
