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1. Feb. 2022 · Spacetime may not be fundamental, but emerge from a more basic reality. Learn how string theory, holography and other concepts suggest that space and time could arise from something else.
17. Feb. 2022 · Roughly 80% of all of the mass in the universe is made up of what scientists have dubbed "dark matter," but it's not known what it actually is or if it is even matter by our current definition ...
16. Dez. 2003 · ESA / Science & Exploration / Space Science / Extreme space The Universe is thought to consist of three types of substance: normal matter, ‘dark matter’ and ‘dark energy’. Normal matter consists of the atoms that make up stars, planets, human beings and every other visible object in the Universe.
Outer space (or simply space) is the expanse beyond celestial bodies and their atmospheres. It contains ultra-low levels of particle densities, constituting a near-perfect vacuum [1] of predominantly hydrogen and helium plasma, permeated by electromagnetic radiation, cosmic rays, neutrinos, magnetic fields and dust.
11. Aug. 2018 · Space is not empty, but full of hydrogen, dark matter and dark energy. Learn how astronomers measure and understand these components of the universe, and how they affect its expansion and structure.
The universe is mostly composed of dark matter and dark energy, which are invisible and mysterious. Learn how scientists at CfA are studying these phenomena using telescopes, satellites, and simulations.
The universe is everything, including space, time, matter and energy. Learn how the universe began, how old it is, and what it is made of from NASA's experts.
