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Physical cosmology. The Big Crunch is a hypothetical scenario for the ultimate fate of the universe, in which the expansion of the universe eventually reverses and the universe recollapses, ultimately causing the cosmic scale factor to reach zero, an event potentially followed by a reformation of the universe starting with another Big Bang.
The Big Crunch. The vertical axis can be considered as expansion or contraction with time. The Big Crunch hypothesis is a symmetric view of the ultimate fate of the universe. Just as the theorized Big Bang started as a cosmological expansion, this theory assumes that the average density of the universe will be enough to stop its expansion and ...
Jan 31, 2021 · How will the universe end? Learn about the two main scenarios: a Big Crunch, where gravity overpowers expansion, and a Big Freeze, where dark energy prevails. Find out how astronomers discovered dark energy and why the Big Crunch is unlikely.
Sep 28, 2023 · The big crunch is a possible scenario in which the universe stops expanding and starts contracting under the influence of gravity. Learn about the evidence for the big bang, the role of dark energy and the debate over the fate of the cosmos.
Aug 8, 2009 · The Big Crunch is a scenario where the Universe collapses into a black hole after expanding from the Big Bang. Learn about the factors that influence this possibility, such as dark energy and critical density, and how NASA observatories are studying it.
Sep 13, 2019 · WFIRST is a space telescope that will map the structure and evolution of matter in the cosmos, and measure the acceleration of the universe caused by dark energy. Learn how dark energy may affect the future of the universe, and how WFIRST will help uncover its nature and origin.
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Aug 10, 2020 · Astrophysicist Katie Mack's book explores four possible scenarios for the end of the Universe: Big Crunch, Big Freeze, Big Rip and vacuum decay. She explains the physics and evidence behind each scenario, and their implications for life and cosmology.
