The branch of learning that deals with phenomena at the scale of many millions of light-years is called cosmology—a term derived from combining two Greek words, kosmos, meaning “order,” “harmony,” and “the world,” and logos, signifying “word” or “discourse.”

Cosmology is the science of the universe's origin and evolution, from the Big Bang to today and beyond. Learn about the history of cosmology, the common questions it faces, and the missions that explore it.

Learn about the study of the universe as a whole, from its origin to its fate, and the mysteries of dark matter and dark energy. Explore the research projects and tools of cosmologists at the Center for Astrophysics, including simulations, surveys, and telescopes.

a. : a branch of metaphysics that deals with the nature of the universe. b. : a theory or doctrine describing the natural order of the universe. 2. : a branch of astronomy that deals with the origin, structure, and space-time relationships of the universe. also : a theory dealing with these matters. cosmological.

Cosmology (the study of the physical universe) is a science that, due to both theoretical and observational developments, has made enormous strides in the past 100 years. It began as a branch of theoretical physics through Einstein’s 1917 static model of the universe (Einstein 1917) and was developed in its early days particularly through the ...

Cosmology is the scientific field that explores the origin, structure, and evolution of the universe. Learn about the history of cosmology, from ancient beliefs to modern theories, and the key concepts and figures that shaped our understanding of the cosmos.

Cosmology is the scientific study of the universe as a unified whole, from its earliest moments through its evolution to its ultimate fate. The currently accepted cosmological model is the big bang. In this picture, the expansion of the universe started in an intense explosion 13.8 billion years ago. In this primordial fireball, the temperature ...

Cosmology and astronomy 4 units. Unit 1 Scale of the universe. Unit 2 Stars, black holes and galaxies. Unit 3 Earth geological and climatic history. Unit 4 Life on earth and in the universe. Science.

Learn about the origin, development, structure, and future of the entire universe from the DOE Office of Science. Find out how cosmology draws on many scientific disciplines and what are the main topics and challenges of modern cosmology.