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 and ...

Isotropy · Particle horizon · Recombination (cosmology) · Ball (mathematics)

The observable universe is a spherical volume (a ball) centered on the observer, regardless of the shape of the universe as a whole. Every place in 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 ...

Observable universe · Ultimate fate · Chronology · Shape

The scale is such that the fine grains represent collections of large numbers of superclusters. The Virgo Supercluster—home of Milky Way—is marked at the center ...

Physics is one of the most fundamental scientific disciplines, with its main goal being to understand how the universe behaves. A scientist who specializes in ...

Branches · History · Physics education · Portal

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

Ekpyrotic universe · Hydrogen line · Cosmic time · Reionization

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

Intrinsic and extrinsic · Gravitational binding energy · Friedmann–Lemaître

In physical 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 ...