25 Key Facts About The Big Bang Theory You Might Not Know

Accepted by majority of the modern astronomical community, the Big Bang Theory is the prevailing cosmological model and leading explanation of how the Universe began. While the main principle of the theory is quite well known (the Universe was formed by a sort of a massive blast of some ancient energy and has been expanding ever since), there are many facts about it that most people actually don’t know. What are these facts? From the Cosmic Egg to the Big Crunch, here are 25 Key Facts About The Big Bang Theory You Might Not Know.


Proponents of the Big Bang Theory believe that the Universe-forming Big Bang occurred around 13.7 billion years ago.

big bangSource: big-bang-theory.com

According to the theory, the Universe ballooned faster than the speed of light in the first second after it was born. That, by the way, does not violate Einstein's principles of speed as he said that the speed of light is the maximum speed anything can travel within the Universe...not the Universe itself.

speed of lightSource: space.com


Talking about Albert Einstein, the legendary physicist actually dismissed the theory when it was presented to him as a possibility. He rejected the idea that the Universe might have emerged from a much smaller and denser state.

Albert EinsteinSource: forbes.com

The concept that the expanding Universe could be traced back in time to an originating single point was first conceived by Belgian astrophysicist and cosmologist A. G. Lemaitre in 1927.

outer spaceSource: encyclopedia.com


Known as the cosmic microwave background, a cosmic fog that permeates the universe in every direction is considered the best evidence of the Big Bang Theory.

cosmic microwave backgroundSource: space.com

Photos: Feature Image: shutterstock, 25. pixabay (public domain), 24. wikimedia commons (public domain), 23. pixabay (public domain), 22. static.pexels (public domain), 21. wikimedia commons (public domain), 20. Design Alex Mittelmann, Coldcreation, Lambda-Cold Dark Matter, Accelerated Expansion of the Universe, Big Bang-InflationCC BY-SA 3.0, 19. wikimedia commons (public domain), 18. static.pexels (public domain), 17. antony_mayfield via flickr, CC BY 2.0, 16. wikimedia commons (public domain), 15. JohnKeatBlack ScreenCC BY-SA 4.0, 14.  NASA/JPL-Caltech (public domain), 13. Mark Hurn, Plaque to Sir Fred Hoyle – geograph.org.uk – 1409956CC BY-SA 2.0, 12. pixabay (public domain), 11. Greg WilliamsCalvin wikiworldCC BY-SA 2.5, 10. Biswarup Ganguly, Understanding the Universe Exhibition – BITM – Kolkata-2015-02-28 3340CC BY 3.0, 9. Max Pixel (public domain), 8. pixabay (public domain), 7. wikimedia commons (public domain), 6. ESO/VPHAS+ team, VST images the Lagoon NebulaCC BY 4.0, 5-3. wikimedia commons (public domain), 2. ESO, Two very different glowing gas clouds in the Large Magellanic CloudCC BY 4.0, 1. anonymous, Big crunchCC BY-SA 3.0

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