The term Big Bang generally refers to the idea that the Universe has expanded from a primordial hot and dense initial condition at some finite time in the past. According to the ESA/Planck data, released in February 2015, the initial conditions occurred 13.799 ± 0.021 billion years ago, and the Universe continues to expand to this day and onwards.
Wikimedia Commons has media related to Big Bang.
Pages in category "Big Bang"
The following 32 pages are in this category, out of 32 total. This list may not reflect recent changes.