Universe - Wikipedia
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.
What is the Universe? - NASA Science
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 …
Universe - NASA Science
Discover the universe: Learn about the history of the cosmos, what it's made of, and so much more. Worlds beyond our solar system. Scientists have long speculated about the geometry of a black hole’s corona, a region created by strong magnetic …
Universe | Definition & Facts | Britannica
5 天之前 · 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.
What is the universe? - Live Science
2022年5月3日 · 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
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. Scientists aren’t sure what came before inflation or what powered it.
The origins of the universe facts and information - National …
2024年8月16日 · 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.
The Universe - NASA+
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
ViewSpace
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 spectacular imagery from space telescopes.
The history of the universe: Big Bang to now in 10 easy steps
2022年2月2日 · 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....