Dark Energy by Varun Sahni

Explore the mysteries of dark energy in this comprehensive lecture, the first in a series on cosmology. Delve into the puzzling nature of the Universe's expansion and the role of dark energy as a potential explanation. Learn about the Lambda cold dark matter (LCDM) paradigm and its implications for our understanding of the cosmos. Examine the latest observational evidence and theoretical models that attempt to explain this enigmatic force. Gain insights into the ongoing debates surrounding dark energy, including whether it's a cosmological constant or a more dynamic phenomenon. Discover how this topic fits into the broader context of modern cosmology and its potential impact on our understanding of gravity and the fundamental laws of physics.