What are alternative scenarios to inflation for explaining the initial conditions of the Big Bang, such as the ekpyrotic or cyclic models?

Mar 1, 2012 ... The Big Bang Model is a broadly accepted theory for the origin and evolution of our universe. It postulates that 12 to 14 billion years ago, the ... Jun 20, 2014 ... Most astronomers believe the Universe began in a Big Bang about 14 billion years ago. At that time, the entire Universe was inside a bubble ... Nov 14, 2011 ... The guy identifies the bird as a Blue Jay. It isn't. It's a Black-throated Magpie-Jay, a Mexican species that is sometimes kept in captivity. One of the strongest proofs of the theory is the observation of Edwin Hubble that the farther the galaxies are, the faster they recede. Jan 29, 2025 ... According to this theory, the universe began as an infinitely small, hot, and dense point, which rapidly expanded and continued to stretch over ... Jun 20, 2016 ... It offers in particular physical models for the origins of the atomic nuclei, of matter and of the large scale structure. This text summarizes ... Jan 14, 2024 ... The hot big bang does not even occur at the beginning of the BB theory timeline. It's own timeline includes the final fraction of a second of ... The big bang is how astronomers explain the way the universe began. It is the idea that the universe began as just a single point, then expanded and stretched. Theories about the Universe's development, such as the Big Bang theory, are based on astronomical observations such as red-shift and cosmic microwave ... Most physicists believe the universe was born in a big bang 13.8 billion years ago. In it, the energy making up everything in the cosmos we see today was ...