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33 relations: Accelerating expansion of the universe, Atom, Big Bounce, Big Crunch, Cambridge University Press, Dark energy, Dartmouth College, Energy density, Entropy (arrow of time), Equation of state (cosmology), Expansion of the universe, False vacuum, Fundamental interaction, Future of an expanding universe, Galaxy, Gravitational singularity, Heat death of the universe, Hubble's law, Hypothesis, Infinity, Milky Way, Monthly Notices of the Royal Astronomical Society, Observable universe, Phantom energy, Physical cosmology, Quintessence (physics), Ratio, Robert R. Caldwell, Scale factor (cosmology), Solar System, Spacetime, Ultimate fate of the universe, Universe.
Accelerating expansion of the universe
The accelerating expansion of the universe is the observation that the universe appears to be expanding at an increasing rate, so that the velocity at which a distant galaxy is receding from the observer is continuously increasing with time.
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Atom
An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element.
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Big Bounce
The Big Bounce is a hypothetical cosmological model for the origin of the known universe.
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Big Crunch
The Big Crunch is one possible scenario for the ultimate fate of the universe, in which the metric expansion of space eventually reverses and the universe recollapses, ultimately causing the cosmic scale factor to reach zero or causing a reformation of the universe starting with another Big Bang.
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Cambridge University Press
Cambridge University Press (CUP) is the publishing business of the University of Cambridge.
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Dark energy
In physical cosmology and astronomy, dark energy is an unknown form of energy which is hypothesized to permeate all of space, tending to accelerate the expansion of the universe.
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Dartmouth College
Dartmouth College is a private Ivy League research university in Hanover, New Hampshire, United States.
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Energy density
Energy density is the amount of energy stored in a given system or region of space per unit volume.
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Entropy (arrow of time)
Entropy is the only quantity in the physical sciences (apart from certain rare interactions in particle physics; see below) that requires a particular direction for time, sometimes called an arrow of time.
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Equation of state (cosmology)
In cosmology, the equation of state of a perfect fluid is characterized by a dimensionless number w, equal to the ratio of its pressure p to its energy density \rho: It is closely related to the thermodynamic equation of state and ideal gas law.
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Expansion of the universe
The expansion of the universe is the increase of the distance between two distant parts of the universe with time.
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False vacuum
In quantum field theory, a false vacuum is a hypothetical vacuum that is somewhat, but not entirely, stable.
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Fundamental interaction
In physics, the fundamental interactions, also known as fundamental forces, are the interactions that do not appear to be reducible to more basic interactions.
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Future of an expanding universe
Observations suggest that the expansion of the universe will continue forever.
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Galaxy
A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter.
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Gravitational singularity
A gravitational singularity or spacetime singularity is a location in spacetime where the gravitational field of a celestial body becomes infinite in a way that does not depend on the coordinate system.
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Heat death of the universe
The heat death of the universe is a plausible ultimate fate of the universe in which the universe has diminished to a state of no thermodynamic free energy and therefore can no longer sustain processes that increase entropy.
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Hubble's law
Hubble's law is the name for the observation in physical cosmology that.
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Hypothesis
A hypothesis (plural hypotheses) is a proposed explanation for a phenomenon.
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Infinity
Infinity (symbol) is a concept describing something without any bound or larger than any natural number.
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Milky Way
The Milky Way is the galaxy that contains our Solar System.
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Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society (MNRAS) is a peer-reviewed scientific journal covering research in astronomy and astrophysics.
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Observable universe
The observable universe is a spherical region of the Universe comprising all matter that can be observed from Earth at the present time, because electromagnetic radiation from these objects has had time to reach Earth since the beginning of the cosmological expansion.
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Phantom energy
Phantom energy is a hypothetical form of dark energy satisfying the equation of state with w. It possesses negative kinetic energy, and predicts expansion of the universe in excess of that predicted by a cosmological constant, which leads to a Big Rip.
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Physical cosmology
Physical cosmology is the study of the largest-scale structures and dynamics of the Universe and is concerned with fundamental questions about its origin, structure, evolution, and ultimate fate.
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Quintessence (physics)
In physics, quintessence is a hypothetical form of dark energy, more precisely a scalar field, postulated as an explanation of the observation of an accelerating rate of expansion of the universe.
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Ratio
In mathematics, a ratio is a relationship between two numbers indicating how many times the first number contains the second.
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Robert R. Caldwell
Robert R. Caldwell is an American theoretical physicist and Professor of Physics and Astronomy at Dartmouth College.
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Scale factor (cosmology)
The relative expansion of the universe is parametrized by a dimensionless scale factor a. Also known as the cosmic scale factor or sometimes the Robertson–Walker scale factor, this is a key parameter of the Friedmann equations.
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Solar System
The Solar SystemCapitalization of the name varies.
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Spacetime
In physics, spacetime is any mathematical model that fuses the three dimensions of space and the one dimension of time into a single four-dimensional continuum.
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Ultimate fate of the universe
The ultimate fate of the universe is a topic in physical cosmology, whose theoretical restrictions allow possible scenarios for the evolution and ultimate fate of the universe to be described and evaluated.
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Universe
The Universe is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy.
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Redirects here:
Big RIP, Big rip, The big rip.
References
[1] https://en.wikipedia.org/wiki/Big_Rip
