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...e mass and radius that must be satisfied for static, spherically symmetric matter configurations under certain conditions. In particular, for areal radius <m ...ion to the [[Einstein equations]] (without [[cosmological constant]]) with matter confined to areal radius <math> R </math> that behaves as a [[perfect fluid ...

== Magnetic toroidal moments in condensed matter physics == In [[condensed matter]] magnetic toroidal order can be induced by different mechanisms:<ref>{{cit ...

...iverse is exactly [[zero]]: its amount of positive energy in the form of [[matter]] is exactly cancelled out by its negative energy in the form of [[gravity] ...gies and time reversal in Quantum Field Theory and General Relativity: The Dark Side of Gravity]", ''HAL Open Science'', 2004. ⟨hal-00001476v1⟩</ref> ...

...from nothingness", although the zero-energy universe model requires both a matter field with positive energy and a gravitational field with negative energy t ...nal field. So the universe can start off with zero energy and still create matter. Obviously, the universe starts off at a certain time. Now you can ask: wha ...

...of energy called [[dark energy]]. Some physicists speculate that a form of dark energy called [[quintessence (physics)|quintessence]] could be a fifth forc ...s, to municipal scales, to the scale of the [[Earth]], the Sun, and [[dark matter]] at the center of the galaxy. ...

...own the tube from the cathode toward the anode, until the tube was totally dark. But at the anode (positive) end of the tube, the glass of the tube itself ...rther, on average, before they struck a gas atom. By the time the tube was dark, most of the electrons could travel in straight lines from the cathode to t ...

...zed values of the present radiation energy density, matter density, and "[[dark energy]] density", respectively (the latter representing the [[cosmological ...arameter 72 km/s/Mpc, <math>\Omega_\Lambda=0.732</math>, <math>\Omega_{\rm matter}=0.266</math>, <math>\Omega_{\rm radiation}=0.266/3454</math>, and <math>\O ...

...n by Grib and Pavlov (2007, 2008) envisages the decay of superheavy [[dark matter]]&nbsp;by means of the [[Penrose process]]. ...le|Sigma0}} baryons]]). This will then combust the entire star to strange matter, at which point the neutron star becomes a strange star and its magnetic fi ...

...age:World line.svg|upright=1.2|right|thumb|A visualisation of the present (dark blue plane) and past and future [[light cone]]s in 2D space.]] The original ...era]], after the universe's matter content has become diluted enough for [[dark energy]] to dominate the total energy density. It is also in the universe's ...

'''[[Physics]]''' – [[natural science]] that involves the study of [[matter]]<ref name="feynman">[[Richard Feynman]] begins [[The Feynman Lectures on P |title=Matter and Motion ...

...luctuations|url=https://www.newscientist.com/article/dn16095-its-confirmed-matter-is-merely-vacuum-fluctuations/|access-date=2020-06-18|website=New Scientist ...is released in the explosion as would correspond to the initial antimatter matter annihilation.<ref>{{cite book |last=Zimmerman |first=Herman |author2=Rick S ...

...try|matter–antimatter asymmetry]], and the nature of [[dark matter]] and [[dark energy]].<ref name=sym-v2-feb-05>{{cite web ...tandard Model does not supply any fundamental particles that are good dark matter candidates. ...

...operties of [[galaxies]]. It is an alternative to the hypothesis of [[dark matter]] in terms of explaining why galaxies do not appear to obey the currently u ...a [[Elementary particle|particle]], or do the phenomena attributed to dark matter actually require a modification of the laws of gravity? ...

...right-hand y-axis is the scale factor. This model of the universe includes dark energy which causes an accelerating expansion after a certain point in time ...ies just outside the [[galaxy group|group]] local to the observed "lump of matter"). ...

...colliders, non-standard [[Higgs boson|Higgs]] physics and particle [[dark matter]]. Most of her publications relate directly to experiment, from computing t ...

...ltra-high-energy cosmic ray#Relation with dark matter|a relation with dark matter]], or decays of exotic super-heavy particles beyond those known in the [[St ...he correlation of the highest energy cosmic rays with nearby extragalactic matter |journal=Astropart. Phys. |volume=34 |issue=5 |pages=314&ndash;326 |doi=10. ...

{{Distinguish|dark fluid|dark flow|dark matter}} ...ro/dareng.html |url-status=live }}</ref><ref>{{Cite web |title=Dark Matter(Dark Energy) |url=http://ngm.nationalgeographic.com/2015/01/hidden-cosmos/ferris ...

...pose only in accord with its proper role in the whole cycle of inquiry. No matter how much it may be necessary to study these processes in abstraction from e ...It occurs to him that it is probably going to rain; looking up, he sees a dark cloud between him and the sun, and he then quickens his steps. What, if any ...

...udy of technology.<ref>{{cite book|last=Pinch|first=Trevor|title=How Users Matter: The Co-Construction of Users and Technology|year=2003|publisher=MIT Press| ...This results in a sociology that says nothing about how such technologies matter in the broader context. ...

...gies]]. SNSPDs are available with very high detection efficiency, very low dark count rate and very low timing jitter, compared to other types of single-ph ...r the Detection of Low-Energy Electron Recoils from MeV/c² Dark Matter". IEEE Transactions on Nuclear Science. 66 (11): 2333–2337. Bibcode:2019ITN ...