<p align="right">Last Update: <font color="#4f81bd">January 07, 2025</font></p> ## BIG IDEAS - Attributed to Belgian astronomer Georges Lemaître. - The term "Big Bang" itself was coined by British astronomer Fred Hoyle during a BBC radio broadcast in 1949. - Describes how the universe started from an initial state of high density and temperature. - The universe since the Big Bang has been expanding and cooling. This theory posits that the universe began as a singular, extremely hot and dense point approximately 13.8 billion years ago. It has since expanded and cooled, leading to the formation of galaxies, stars, and other cosmic structures. The evidence supporting this includes the cosmic microwave background radiation and the observable expansion of the universe. ### Slide Deck <div style="position: relative; width: 100%; height: 0; padding-top: 56.2500%; padding-bottom: 0; box-shadow: 0 2px 8px 0 rgba(63,69,81,0.16); margin-top: 1.6em; margin-bottom: 0.9em; overflow: hidden; border-radius: 8px; will-change: transform;"> <iframe loading="lazy" style="position: absolute; width: 100%; height: 100%; top: 0; left: 0; border: none; padding: 0;margin: 0;" src="https://www.canva.com/design/DAGaEJ5aRH4/pFyvf5GEWakK9vtCYdTxyg/view?embed" allowfullscreen="allowfullscreen" allow="fullscreen"> </iframe> </div> ### Source [The Big Bang - NASA Science](https://science.nasa.gov/universe/the-big-bang/) --- Return [[Home|Home]] | [[The Universe]] | [[The Big Bang|The Big Bang Theory]] | [[Solar System]] | [[Galaxies]] | [[Star Clusters]] | [[Superclusters]] | [[Black Holes]]