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  1. Universe - Wikipedia

    The universe comprises all of existence: all forms of matter and energy, and the structures they form, from sub-atomic particles to entire galactic filaments. Since the early 20th century, the field of …

  2. What is the Universe? - Science@NASA

    Oct 29, 2024 · The universe is everything. It includes all of space, and all the matter and energy that space contains. It even includes time itself and, of course, it includes you.

  3. Scale of the Universe

    Scale of Universe is an interactive experience to inspire people to learn about the vast ranges of the visible and invisible world.

  4. Universe Map

    Universe Map is your definitive guide to galaxies, stars, and cosmic structures — mapped, analyzed, and optimized for discovery and research.

  5. Universe | Definition & Facts | Britannica

    Mar 2, 2026 · 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, …

  6. What is the universe made of? - Harvard–Smithsonian Center for ...

    Home > Big Questions > What is the universe made of? Matter and energy are the two basic components of the entire Universe. An enormous challenge for scientists is that most of the matter in …

  7. What is the universe? - Live Science

    May 3, 2022 · It's quite a big question and a lot is still unknown about the universe, but we'll tell you everything that we do know, from how the universe was created, how old it is and what it's even …

  8. Mysteries of the Universe - Smithsonian Institution

    What is the universe made of? How did it begin? How has it evolved over the 13.8 billion years since its origin? These are some of the questions addressed by cosmology, the study of the universe as a …

  9. Universe Facts - Space Facts

    Universe Facts The universe is the sum total of all the planetary systems, stars, nebulae, galaxies, galactic clusters, black holes, and the atoms and molecules that make all these objects. It also …

  10. The origins of the universe, explained - National Geographic

    Jan 18, 2017 · The most popular theory of our universe's origin centers on a cosmic cataclysm unmatched in all of history—the big bang.