cosmology, the shape of the universe refers to both its local and global geometry. Local geometry is defined primarily by its curvature, while the global...

The expansion of the universe is the increase in distance between gravitationally unbound parts of the observable universe with time. It is an intrinsic...

universe. There is a strong consensus among cosmologists that the shape of the universe is considered "flat" (parallel lines stay parallel) and will continue...

The Big Bang is a physical theory that describes how the universe expanded from an initial state of high density and temperature. The notion of an expanding...

The heat death of the universe (also known as the Big Chill or Big Freeze) is a hypothesis on the ultimate fate of the universe, which suggests the universe...

the shape of the universe, it has no distinct spatial center. Historically, different people have suggested various locations as the center of the Universe...

cosmology, the age of the universe is the time elapsed since the Big Bang. Astronomers have derived two different measurements of the age of the universe: a measurement...

Starobinsky and Yakov Zeldovich at the Landau Institute in Moscow proposed a cosmological model where the shape of the universe is a 3-torus. Overbeye, Dennis...

If the shape of the universe is hyperspherical and Rt is the radius of curvature (R0 at the present), then a = ⁠Rt/R0⁠. If k is positive, then the universe...

The universe is all of space and time and their contents. It comprises all of existence, any fundamental interaction, physical process and physical constant...

modern cosmology, there was considerable talk about the size and shape of the universe. In 1920, the Shapley–Curtis debate took place between Harlow Shapley...

Observations show that the expansion of the universe is accelerating, such that the velocity at which a distant galaxy recedes from the observer is continuously...

spaces between filaments (the largest-scale structures in the universe), which contain very few or no galaxies. In spite of their size, most galaxies...

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

The multiverse is the hypothetical set of all universes. Together, these universes are presumed to comprise everything that exists: the entirety of space...

dodecahedron, the children's story, toys, and painting arts. It can also be found in nature and supramolecules, as well as the shape of the universe. The skeleton...

The observable universe is a ball-shaped region of the universe consisting of all matter that can be observed from Earth or its space-based telescopes...

observations suggest that the expansion of the universe will continue forever. The prevailing theory is that the universe will cool as it expands, eventually...

inflation, is a theory of exponential expansion of space in the very early universe. Following the inflationary period, the universe continued to expand...

of creation out of nothing. Many atheist philosophers have argued against the idea of the Universe having a beginning – the universe might simply have...

cosmological model) is a cosmological model in which the observable universe is the interior of a black hole. Such models were originally proposed by...

of several cosmological models in which the universe follows infinite, or indefinite, self-sustaining cycles. For example, the oscillating universe theory...

correct, then solutions beyond the existing ΛCDM model might be needed. The ΛCDM model assumes that the shape of the universe is of zero curvature (is flat)...

(cosmos) 'the universe, the world' and λογία (logia) 'study of') is a branch of physics and metaphysics dealing with the nature of the universe, the cosmos...

The characterization of the universe as finely tuned intends to explain why the known constants of nature, such as the electron charge, the gravitational...

a static universe (also referred to as stationary, infinite, static infinite or static eternal) is a cosmological model in which the universe is both spatially...

proposed form of energy that affects the universe on the largest scales. Its primary effect is to drive the accelerating expansion of the universe. Assuming...

Friedmann–Lemaître–Robertson–Walker metric, including the current version of the ΛCDM model, or is the universe inhomogeneous or anisotropic? (more unsolved problems...

to the Planck epoch, the universe had no boundary in space-time; before the Big Bang, time did not exist and the concept of the beginning of the universe...

Comoving distance factors out the expansion of the universe, giving a distance that does not change in time due to the expansion of space (though this may change...