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A positive vacuum energy density resulting from a cosmological constant implies a negative pressure, and vice versa. If the energy density is positive, the associated negative pressure will drive an accelerated expansion of the universe, as observed. (See Dark energy and Cosmic inflation for details.)
The magnitude of the energy of cosmic ray flux in interstellar space is very comparable to that of other deep space energies: cosmic ray energy density averages about one electron-volt per cubic centimetre of interstellar space, or ≈1 eV/cm 3, which is comparable to the energy density of visible starlight at 0.3 eV/cm 3, the galactic magnetic ...
Alan Guth and Alexei Starobinsky proposed in 1980 that a negative pressure field, similar in concept to dark energy, could drive cosmic inflation in the very early universe. Inflation postulates that some repulsive force, qualitatively similar to dark energy, resulted in an enormous and exponential expansion of the universe during its earliest ...
Other high-energy cosmic messengers zipping through space are not as reliable. For instance, the path of cosmic rays gets bent by magnetic fields, so they cannot be traced back to their place of ...
In cosmology, the cosmological constant problem or vacuum catastrophe is the substantial disagreement between the observed values of vacuum energy density (the small value of the cosmological constant) and the much larger theoretical value of zero-point energy suggested by quantum field theory.
Vacuum energy is an underlying background energy that exists in space throughout the entire universe. [1] The vacuum energy is a special case of zero-point energy that relates to the quantum vacuum. [2]
Cosmic ray astronomy is a branch of observational astronomy where scientists attempt to identify and study the potential sources of extremely high-energy (ranging from 1 MeV to more than 1 EeV) charged particles called cosmic rays coming from outer space.
Cosmic Energy, a 2020 extended play in the Katy Perry discography "Cosmic Energy", a song by Kool and the Gang from the 1976 album Love & Understanding; Power Cosmic, the source of the superpowers of Galactus and the Silver Surfer