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See all on WikipediaUniverse - Wikipedia
The universe is all of space and time and their contents. It comprises all of existence, any fundamental interaction, physical process and physical constant, and therefore all forms of matter and energy, and the structures they form, from sub-atomic particles to entire galactic filaments. Since the early 20th century, the field … See more
Of the four fundamental interactions, gravitation is the dominant at astronomical length scales. Gravity's effects are cumulative; by contrast, the effects of positive and negative … See more
The frequency of life in the universe has been a frequent point of investigation in astronomy and astrobiology, being the issue of the See more
Model of the universe based on general relativity
General relativity is the geometric theory of gravitation published by Albert Einstein in 1915 and the current … See moreThe word universe derives from the Old French word univers, which in turn derives from the Latin word universus, meaning 'combined into one'. … See more
The universe is composed almost completely of dark energy, dark matter, and ordinary matter. Other contents are electromagnetic radiation (estimated to constitute from 0.005% to close to 0.01% of the total mass–energy of the universe) and See more
Wikipedia text under CC-BY-SA license What is the Universe? - NASA Science
Oct 29, 2024 · The universe is everything. It includes all of space, and all the matter and energy that space contains. It even includes time itself and, of course, it includes you. Earth and the Moon are part of the universe, as are the other …
Universe - NASA Science
- Exoplanets. Worlds beyond our solar system.
- Stars. Giant balls of hot gas that burn for millions to billions of years.
- Black Holes. Concentrations of matter with gravity so powerful not even light can escape.
- Galaxies. Collections of stars, planets, and vast clouds of gas and dust bound together by …
- The Search for Life. Earth is the only planet we know of with life on it ... so far.
Universe | Definition & Facts | Britannica
- universe, the whole cosmic system of matter and energy of which Earth, and therefore the hum…
The “observable universe” is the region of space that humans can actually or theoretically observe with the aid of technology. It can be thought of as a bubble with Earth at its centre. It is differentiated from the entirety of the universe, which is the whole cosmic system of matter and …
- universe, the whole cosmic system of matter and energy of which Earth, and therefore the hum…
What is the universe? - Live Science
May 3, 2022 · The universe is literally everything, the sum of all existence. It includes all matter, like stars and galaxies. The universe also includes all radiation and all other forms of energy.
Overview - NASA Science
Oct 22, 2024 · Here is the history of the universe according to cosmologists’ current theories. Around 13.8 billion years ago, the universe expanded faster than the speed of light for a fraction of a second, a period called cosmic inflation. …
The Universe - NASA+
Jan 31, 2025 · Discover how the universe works, explore how it began and evolved, and search for life on planets around other stars as we seek to understand the universe and
The origins of the universe facts and information
Aug 16, 2024 · How did the universe begin—and what were its early days like? The most popular theory of our universe's origin centers on a cosmic cataclysm unmatched in all of history—the big bang.
Explore the Universe with Interactives and Videos
ViewSpace videos tell the stories of the planets, stars, galaxies, and universe, giving viewers the opportunity to experience space and Earth as seen with satellites and telescopes. Astronomy: Explore the sky with stories told through …
Universe - Simple English Wikipedia, the free …
The universe is space and everything in it. [1][2][3][4] It is made of many billions of stars and planets and enormous clouds of gas separated by big spaces. The Big Bang started the expansion of the universe. Astronomers use telescopes …
