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
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 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
Universe Today - Space and Astronomy News Dark matter makes up roughly 85 percent of all the matter in the universe We have never directly detected a single particle of it
The Universe - Windows to the Universe The universe is filled with an amazing variety of celestial objects Find out about astronomy through history, how we understand the sky, constellations, sky maps and stars, exoplanets, galaxies, and strange stuff - like neutron stars and black holes
What is the universe? - Live Science 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 made
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
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