Revised Auust 2026 There is also a video about the Steady State theory on the Explaining Science YouTube channel. https://youtu.be/aUmQjmw4jhE The Steady State theory is an elegant alternative to the Big Bang theory of the origin of the Universe . It was very popular among astronomers in the 1950s, but is now obsolete. What is the… Continue reading The Steady State Theory
This post, which is the latest in my series on cosmology, is about the ultimate fate of the Universe, a subject which has engaged scientists, philosophers and religious leaders for centuries. There are many possible endings to the Universe, but the outline I will present here, which is sometimes called "The Big Freeze", is the most commonly held… Continue reading Ultimate Fate of the Universe.
Updated August 2026 This post gives a (brief!) history of the Universe from the Big Bang until the the present day. As I am sure you'll agree, it's a big topic; so I'll only give a outline of some of the key events and when we believed they happened. This post is one of many… Continue reading A Brief History of the Universe
The Universe is all existing matter and space, including all stars, planets, galaxies and the space between them. This post, which is the first in a series about cosmology discusses the origins of the Universe and its ultimate future. (All my posts on this topic can be found at https://explainingscience.org/tag/cosmology/) How large is the Universe ?… Continue reading The Universe Past, Present and Future.
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