Category:Big Bang

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The main article for this category is Big Bang.
Simulated image of the first stars, 400 Myr after the Big Bang.

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.


This category has only the following subcategory.