- Universe - Wikipedia
The physical universe is defined as all of space and time [a] (collectively referred to as spacetime) and their contents [9] Such contents comprise all of energy in its various forms, including electromagnetic radiation and matter, and therefore planets, moons, stars, galaxies, and the contents of intergalactic space [17][18][19] The universe also includes the physical laws that influence
- Universe - NASA Science
Discover the universe: Learn about the history of the cosmos, what it's made of, and so much more Concentrations of matter with gravity so powerful not even light can escape Collections of stars, planets, and vast clouds of gas and dust bound together by gravity Worlds beyond our solar system
- Universe | Definition Facts | Britannica
Universe, the whole cosmic system of matter and energy of which Earth is a part
- UNIVERSE MAP
Universe Map is your definitive guide to galaxies, stars, and cosmic structures — mapped, analyzed, and optimized for discovery and research
- What is the Universe? Humanity’s Grandest Mystery
It tells us that the universe began nearly 13 8 billion years ago in a cataclysmic event known as the Big Bang From a state of unimaginable density and heat, space itself expanded, carrying with it energy and matter that would eventually form galaxies, stars, planets, and life
- How will the universe end?
Will the universe keep existing forever? An astrophysicist explains how scientists aren’t entirely sure, but they can make predictions
- What is the Universe? - AMNH
The universe is all the matter, energy, and space that exist We can observe only a part of it - the observable universe The entire, universe, including the part we cannot see, may be infinite Matter is the physical substance of things--of stars, planets, people, and atoms
- Mysteries of the Universe - Smithsonian Institution
These are some of the questions addressed by cosmology, the study of the universe as a whole Smithsonian astronomers and astrophysicists use observational and theoretical techniques to help us answer other "big questions" of the universe
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