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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 matter and energy, and the structures they form, from sub-atomic particles to entire galactic filaments.
The Universe is an elementary verse forming the basis of containment hierarchies. Universes in a Multiverse share common laws of physics, and systems of logic, but differ in initial starting conditions upon being formed, and thus have entirely different timelines.
Studies show that the observable universe is isotropic and homogeneous on the largest scales. If the observable universe encompasses the entire universe, we might determine its structure through observation.
The observable universe is a spherical region of the universe consisting of all matter that can be observed from Earth or its space-based telescopes and exploratory probes at the present time; the electromagnetic radiation from these objects has had time to reach the Solar System and Earth since the beginning of the cosmological expansion.
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.
The universe is nearly 14 billion years old, our solar system is 4.6 billion years old, life on Earth has existed for maybe 3.8 billion years, and humans have been around for only a few hundred thousand years. In other words, the universe has existed roughly 56,000 times longer than our species has.
Discover the universe: Learn about the history of the cosmos, what it's made of, and so much more.
universe, the whole cosmic system of matter and energy of which Earth, and therefore the human race, is a part. Humanity has traveled a long road since societies imagined Earth, the Sun , and the Moon as the main objects of creation, with the rest of the universe being formed almost as an afterthought.
The history of the universe and how it evolved is broadly accepted as the Big Bang model, which states that the universe began as an incredibly hot, dense point roughly 13.7 billion years ago....
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. Here is the history of the universe according […]