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The universe is all of space and time [a] and their contents. [10] It comprises all of existence, any fundamental interaction, physical process and physical constant, and therefore all forms of energy and matter, and the structures they form, from sub-atomic particles to entire galactic filaments.
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The universe is everything, including space, time, matter and energy. Learn how old the universe is, what it is made of, and how it has changed over time.
Learn how the universe evolved from the big bang to the present day, and what mysteries remain to be explored. Discover the key events, eras, and discoveries that shaped our cosmic story, from cosmic inflation to dark energy.
- 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 gravity.
5 days ago · Learn about the universe, the whole cosmic system of matter and energy, from its origin in the big bang to its current state of expansion and evolution. Explore the observable universe, the solar system, the galaxies, and the possible multiverse with Britannica.
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.
