Rather than unfolding evenly, the universe evolves in pulses-leaps of increasing complexity that mark its deep structure. This work introduces a logarithmic model of astronomical time, charting five major nodes in the universe's evolution. Each pulse represents a threshold: from formless beginnings to galaxies, from planetary habitability to life itself. The First Node (~32 Gya) is speculative and foundational, proposing a formative reality from which the universe can arise-a necessity implied by the basic scientific and philosophic principle that something cannot come from nothing. The Second Node (~16 Gya) marks-within 25% log distance-the observable detection of galaxies and large-scale cosmic structure. The Third Node (~8 Gya) aligns with the emergence of interactive, layered rocky planets capable of supporting complex chemistry. The Fourth Node (~4 Gya) coincides with the emergence of living matter-a quantum leap in the universe's capacity to self-organize. The Fifth Node (~2 Gya) captures a triple transformation: the oxygenation of Earth's atmosphere, the full mobilization of global plate tectonics, and the radical complexification of life with the emergence of symbiotic eukaryotic cells-foundational for multicellular life to come. At the heart of this model is the recognition that time is not merely a backdrop, but a structure that reveals order-where major events cluster in patterns visible through logarithmic scaling. This approach not only maps what is known, but frames what remains to be discovered. By drawing connections between the astronomical and the biological worlds, it offers a unified perspective on how complexity unfolds across the cosmos.