Observable Universe Wikipedia

Observable universe - Wikipedia.

The observable universe is a ball-shaped region of the universe comprising all matter that can be observed from Earth or its space-based telescopes and exploratory probes at the present time, because the electromagnetic radiation from these objects has had time to reach the Solar System and Earth since the beginning of the cosmological expansion.There may be 2 trillion galaxies in ....


Univers observable — Wikipédia.

L'Univers observable est, en cosmologie, la partie visible de notre Univers.Il est donc une boule dont la limite est situee a l'horizon cosmologique et dont la Terre constitue le centre. C'est ainsi une notion relative, d'autres observateurs situes ailleurs dans l'Univers n'ont pas la meme boule observable, mais une similaire de meme rayon..


Universe - Wikipedia.

The universe (Latin: universus) is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy.The Big Bang theory is the prevailing cosmological description of the development of the universe. According to this theory, space and time emerged together 13.787 +- 0.020 billion years ago, and the universe has been expanding ....


Multiverse - Wikipedia.

Black-hole cosmology is a cosmological model in which the observable universe is the interior of a black hole existing as one of possibly many universes inside a larger universe. This includes the theory of white holes, which are on the opposite side of space-time. Anthropic principle.


Tao - Wikipedia.

Tao or Dao is the natural order of the universe whose character one's intuition must discern to realize the potential for individual wisdom, as conceived in the context of East Asian philosophy, East Asian religions, or any other philosophy or religion that aligns to this principle.This intuitive knowing of life cannot be grasped as a concept. Rather, it is known through actual living ....


Big Bang - Wikipedia.

The Big Bang theory describes how the universe expanded from an initial state of high density and temperature. It is the prevailing cosmological model explaining the evolution of the observable universe from the earliest known periods through its subsequent large-scale form. The model offers a comprehensive explanation for a broad range of observed phenomena, ....


Observer effect (physics) - Wikipedia.

In physics, the observer effect is the disturbance of an observed system by the act of observation. This is often the result of instruments that, by necessity, alter the state of what they measure in some manner. A common example is checking the pressure in an automobile tire; this is difficult to do without letting out some of the air, thus changing the pressure. Similarly, seeing non ....


Age of the universe - Wikipedia.

In physical cosmology, the age of the universe is the time elapsed since the Big Bang.Today, astronomers have derived two different measurements of the age of the universe: a measurement based on direct observations of an early state of the universe, which indicate an age of 13.787 +- 0.020 billion years as interpreted with the Lambda-CDM concordance model as ....


Array data structure - Wikipedia.

In computer science, an array data structure, or simply an array, is a data structure consisting of a collection of elements (values or variables), each identified by at least one array index or key.An array is stored such that the position of each element can be computed from its index tuple by a mathematical formula. The simplest type of data structure is a linear array, also called one ....


Alcubierre drive - Wikipedia.

The Alcubierre drive is a speculative warp drive idea according to which a spacecraft could achieve apparent faster-than-light travel by contracting space in front of it and expanding space behind it, under the assumption that a configurable energy-density field lower than that of vacuum (that is, negative mass) could be created. Proposed by theoretical physicist Miguel Alcubierre ....


Olbers' paradox - Wikipedia.

The poet Edgar Allan Poe suggested that the finite size of the observable universe resolves the apparent paradox. More specifically, because the universe is finitely old and the speed of light is finite, only finitely many stars can be observed from Earth (although the whole universe can be infinite in space). The density of stars within this finite volume is sufficiently low that any line ....


Universe - Simple English Wikipedia, the free encyclopedia.

The Universe is huge and possibly infinite in volume. The matter which can be seen is spread over a space at least 93 billion light years across. For comparison, the diameter of a typical galaxy is only 30,000 light-years, and the typical distance between two neighboring galaxies is only 3 million light-years. As an example, our Milky Way Galaxy is roughly 100,000 light years in diameter, and ....


Sloan Great Wall - Wikipedia.

The wall measures 1.37 billion light-years (1.30 x 10 25 m) in length, located approximately one billion light-years away. In the sky, it is located within the region of the constellations Corvus, Hydra and Centaurus.It is approximately 1/60 of the diameter of the observable universe, making it the sixth largest known object after the large quasar groups Clowes-Campusano LQG, U1.11, ....


Big Bang nucleosynthesis - Wikipedia.

It was widespread, encompassing the entire observable universe. The key parameter which allows one to calculate the effects of Big Bang nucleosynthesis is the baryon/photon number ratio, which is a small number of order 6 x 10 -10. This parameter corresponds to the baryon density and controls the rate at which nucleons collide and react ....


Event horizon - Wikipedia.

In cosmology, the event horizon of the observable universe is the largest comoving distance from which light emitted now can ever reach the observer in the future. This differs from the concept of the particle horizon, which represents the largest comoving distance from which light emitted in the past could reach the observer at a given time. For events that occur beyond that distance, ....


Hubble volume - Wikipedia.

In cosmology, a Hubble volume (named for the astronomer Edwin Hubble) or Hubble sphere, subluminal sphere, causal sphere and sphere of causality is a spherical region of the observable universe surrounding an observer beyond which objects recede from that observer at a rate greater than the speed of light due to the expansion of the Universe. The Hubble volume is ....


History of the center of the Universe - Wikipedia.

The center of the Universe is a concept that lacks a coherent definition in modern astronomy; according to standard cosmological theories on the shape of the universe, it has no center.. Historically, different people have suggested various locations as the center of the Universe. Many mythological cosmologies included an axis mundi, the central axis of a flat Earth that ....


Stress - Wikipedia.

Science and medicine. Stress (biology), an organism's response to a stressor such as an environmental condition Stress (linguistics), relative emphasis or prominence given to a syllable in a word, or to a word in a phrase or sentence Stress (mechanics), the internal forces that neighboring particles of a continuous material exert on each other ....


Church of the Flying Spaghetti Monster.

Jul 03, 2022 . I want to share the Trailer from Mosey The Pirate - an upcoming game that features the Flying Spaghetti Monster in all of His glory. It'll be available on Steam soon. >> Read the full post and discuss.


Orders of magnitude (length) - Wikipedia.

886.48 Ym - 93.7 billion light-years - The diameter of the observable universe (twice the particle horizon); however, there might be unobserved distances that are even greater. cosmic light horizon, depending on its curvature; if the curvature is zero (i.e. the universe is spatially flat), the value can be infinite (see Shape of the ....


Comet - Wikipedia.

A comet is an icy, small Solar System body that, when passing close to the Sun, warms and begins to release gases, a process that is called outgassing.This produces a visible atmosphere or coma, and sometimes also a tail.These phenomena are due to the effects of solar radiation and the solar wind acting upon the nucleus of the comet. Comet nuclei range from a few ....


The Observable Universe | Science Mission Directorate.

The Observable Universe Everything you can see, and everything you could possibly see, right now, assuming your eyes could detect all types of radiations around you -- is the observable universe. In visible light, the farthest we can see comes from the cosmic microwave background, a time 13.8 billion years ago when the universe was opaque like ....


Solipsism - Wikipedia.

Solipsism (/ ' s ? l I p s I z ?m / (); from Latin solus 'alone', and ipse 'self') is the philosophical idea that only one's mind is sure to exist. As an epistemological position, solipsism holds that knowledge of anything outside one's own mind is unsure; the external world and other minds cannot be known and might not exist outside the mind..


Hubble's law - Simple English Wikipedia, the free encyclopedia.

Hubble's law or Hubble--Lemaitre's law is the name for the observation that: . All objects observed in deep space have a doppler shift-measured velocity relative to Earth, and to each other;; The doppler-shift-measured velocity of galaxies moving away from Earth, is proportional to their distance from the Earth and all other interstellar bodies.; In effect, the space-time volume of the ....