Universe dimensions

A parallel universe, also known as a parallel dimension, alternate universe or alternate reality, is a hypothetical self-contained plane of existence, co-existing with one's own. While the three terms are generally synonymous and can be used interchangeably in most cases, there is sometimes an additional connotation implied with the term "alternate universe/reality" that implies that the reality is a variant of our own, with some overlap with the similarly-named alternate history..

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Designed by London-based photographer Cameron Baxter A Comprehensive Guide To Navigating Parallel Dimensions is a lovely bought of retro-themed fakery...

One of the most successful theories of 20th century science is cosmic inflation, which preceded and set up the hot Big Bang. We also know how quantum fields generally work, and if inflation is a quantum field (which we strongly suspect it is), then there will always be more "still-inflating" space out there. Whenever and wherever inflation ends, you get a hot Big Bang. If inflation and quantum field theory are both correct, a Multiverse is a must.

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How is a supernova different from a hypernova? Learn about the different types of exploding stars that astronomers have identified.

Journey through the universe without leaving home. This poster offers a striking look into the world of planets.