Tag: Cosmology

Introduction: The Cosmological Puzzle of Existence The question of how the universe began—where all the matter, energy, space, and time ...

Introduction: The Triumphs and Limits of General Relativity The study of the cosmos has been utterly transformed by Albert Einstein's ...

Introduction: A New Window on the Universe For over three decades, the Hubble Space Telescope (HST) provided humanity with breathtaking ...

Introduction: The Universe's Great Cosmic Mystery For centuries, astronomy has relied on the simple principle that what we observe through ...