History Of Universe
The physical universe is defined as all of space and time collectively referred to as spacetime and their contents.
History of universe. The background of this box approximates the original 4000 k color of the photons released during decoupling before they became redshifted to form the cosmic microwave background. A number of themes will emerge as we follow this story. The universe has become transparent to visible light radio waves and other electromagnetic radiation for the first time in its history.
Observations by nasa s cosmic background explorer and wilkinson anisotropy microwave probe revealed. Our universe began in a tremendous explosion known as the big bang about 13 7 billion years ago left side of strip. The universe was born with the big bang as an unimaginably hot dense point.
The most popular theory of our universe s origin centers on a cosmic cataclysm unmatched in all of history the big bang. Such contents comprise all of energy in its various forms including electromagnetic radiation and matter and therefore planets moons stars galaxies and the contents of intergalactic space. Learn about the big bang theory and how our universe got started.
The study of the history of the universe is sometimes called big history a discipline established by historian professor david christian.