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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.
The universe contains all the energy and matter there is. Much of the observable matter in the universe takes the form of individual atoms of hydrogen, which is the simplest atomic element, made of only a proton and an electron (if the atom also contains a neutron, it is instead called deuterium).
The origin, evolution, and nature of the universe have fascinated and confounded humankind for centuries. New ideas and major discoveries made during the 20th century transformed cosmology – the term for the way we conceptualize and study the universe – although much remains unknown.
2 days ago · Unlike the observable universe, the universe is possibly infinite and without spatial edges. Zoom out from Earth's solar system to the Milky Way Galaxy, the Local Group, and beyond Scale of the universe.
Apr 26, 2012 · Join astronomers and astrophysicists as they probe light years beyond the Milky Way, in Understanding The Universe, part of Discovery's popular television series.
Jun 3, 2024 · Welcome to the Universe. Discover the universe: Learn about the history of the cosmos, what it's made of, and so much more. Explore: 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
Mar 15, 2022 · The universe was born with the Big Bang as an unimaginably hot, dense point. When the universe was just 10 -34 of a second or so old — that is, a hundredth of a billionth of a trillionth of...
