Five Ages of the Universe, the astrophysicists Fred Adams and Gregory Laughlin divided the past and future history of an expanding universe into five eras...

on expanding space". arXiv:0809.4573 [astro-ph]. Eddington, Arthur. The Expanding Universe: Astronomy's 'Great Debate', 1900–1931. Press Syndicate of the...

Future of an expanding universe#Galaxies outside the Local Supercluster are no longer detectable. Loeb, Abraham (2002). "The Long-Term Future of Extragalactic...

Ages of the Universe is a popular science book written by astrophysicists Fred Adams and Gregory P. Laughlin about the future of an expanding universe first...

solved in such a way as to allow the universe to be expanding at the present and contracting in the far future, he added to those equations what he called...

Big Bang is a physical theory that describes how the universe expanded from an initial state of high density and temperature. It was first proposed in...

cosmological constant, the universe will continue expanding forever, and a heat death is expected to occur, with the universe cooling to approach equilibrium...

of an open universe in the sense that space will continue expanding forever. A flat universe can have zero total energy. A positively curved universe...

evidence that the universe is not static but expanding. The first estimate of the age of the universe came from the calculation of when all of the objects must...

The chronology of the universe describes the history and future of the universe according to Big Bang cosmology. Research published in 2015 estimates the...

For timelines of the future of the universe, see: Timeline of the Big Bang Future of an expanding universe Timeline of the far future This article includes...

steady state theory is an alternative to the Big Bang theory. In the steady-state model, the density of matter in the expanding universe remains unchanged...

considered the possibility of a cyclic model for the universe as an (everlasting) alternative to the model of an expanding universe. In 1922, Alexander Friedmann...

the constants of proportionality depend on conventions. It is common to describe a patch of this solution as an expanding universe of the FLRW form where...

Gillespie, Stuart (21 October 2016). "The universe is expanding at an accelerating rate – or is it?". University of Oxford – News & Events – Science Blog...

spatially and temporally infinite, and space is neither expanding nor contracting. Such a universe does not have so-called spatial curvature; that is to...

theory of the Big Bang, emerged together 13.787±0.020 billion years ago, and the universe has been expanding ever since. Today the universe has expanded into...

scenario for the ultimate fate of the universe, in which the expansion of the universe eventually reverses and the universe recollapses, ultimately causing...

different universes within the multiverse are called "parallel universes", "flat universes", "other universes", "alternate universes", "multiple universes", "plane...

was the period in the evolution of the early universe when, according to inflation theory, the universe underwent an extremely rapid exponential expansion...

According to the Friedmann equations that describe the dynamics of an expanding universe, a fluid with sufficiently negative pressure exerts gravitational...

average matter density of the Universe, the voids look almost empty to an observer. Voids typically have a diameter of 10 to 100 megaparsecs (30 to 300...

to vanish completely (see Future of an expanding universe). Planet Earth, the Milky Way, and the Local Group of galaxies of which the Milky Way is a part...

November 2018, an auction of 22 personal possessions of Stephen Hawking, including his doctoral thesis ("Properties of Expanding Universes", PhD thesis...

“big bang” as an explosion inside a black hole, producing the expanding volume of space and matter that includes the observable universe. This black hole...

an expanding universe, fluids with larger equations of state disappear more quickly than those with smaller equations of state. This is the origin of...

universe. In 1927, the Belgian physicist Georges Lemaitre proposed an expanding model for the universe to explain the observed redshifts of spiral...

watershed point between an expanding and a contracting Universe. To date, the critical density is estimated to be approximately five atoms (of monatomic hydrogen)...

density increases as the universe expands. A universe dominated by phantom energy is an accelerating universe, expanding at an ever-increasing rate. However...

observations of supernovae determined that not only is the universe expanding, it is expanding at an increasing rate. A better understanding of the acceleration...