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...[[supermassive black hole]], then such supermassive black holes must exist in our local universe as "dead" quasars. ...of several of the closest [[supermassive black hole]]s including the ones in the [[Milky Way]], [[Andromeda Galaxy|M31]], [[Messier 32|M32]], [[Messier ...

{{short description|Hypothetical force carrier particle connected to dark matter}} ...t1=Bob|bibcode=1986PhLB..166..196H}}</ref> and could thus be detected. The dark photon can also interact with the Standard Model if some of the fermions ar ...

...ravitational force from the supermassive black hole keeps the stars moving in very tight orbits about the center of the cluster. ...is happens when two SMBHs in a binary system coalesce, after losing energy in the form of [[gravitational wave]]s. Because the gravitational waves are no ...

{{Distinguish|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 ...

|caption = At the award ceremony for the Charles University Medal in Potsdam, September 2007 |work_institutions = [[University of Hamburg]]<br/>[[Max Planck Institute for Astrophysics]]<br/>[[Max Planck Institute for Gravitational Physics]] ...

...l survived the whole of stellar evolution. Such a disc can manifest itself in various ways. ...10⁻⁹ solar masses per year (rates for typical systems presented in Hartmann et al.<ref>{{Cite journal|last1=Hartmann|first1=L|last2=Calvet|fir ...

...to the lower-right (cooler and less bright), called the [[main sequence]]. In the lower-left is where [[white dwarf]]s are found, and above the main sequ ...pendently in 1911 by [[Ejnar Hertzsprung]] and by [[Henry Norris Russell]] in 1913, and represented a major step towards an understanding of [[stellar ev ...

{{Short description|Change in the apparent position of celestial bodies when seen from two different posi ...w-filled circle). The lower diagram shows the equal angle swept by the Sun in a geostatic model. A similar diagram can be drawn for a star except that th ...

...e:Barnard2005.gif|thumb|[[Barnard's Star]], showing position every 5 years in the period 1985–2005. Barnard's Star is the star with the highest [[proper In [[astronomy]], '''stellar kinematics''' is the [[Observational astronomy|ob ...

...enormalization#Renormalizability|perturbatively nonrenormalizable]] ones. In this respect, it is similar to [[quantum triviality]]. ...nations remain finite. This suffices to avoid unphysical divergences, e.g. in [[S-Matrix|scattering amplitudes]]. The requirement of a UV fixed point res ...

This '''glossary of physics''' is a list of definitions of terms and concepts relevant to [[physics]], its sub-disciplines, and related fields, including {{defn|In {{gli|optics}} and lens design, a measure of a transparent material's {{gli ...

...672–2680}}</ref> In a GAN, two [[neural network]]s contest with each other in the form of a [[zero-sum game]], where one agent's gain is another agent's ...Stefano |title=Generative Adversarial Imitation Learning |journal=Advances in Neural Information Processing Systems |pages=4565–4573 |url=http://papers.n ...

{{Short description|List of definitions of terms and concepts commonly used in aerospace engineering}} ...or (in [[broadcast engineering]]) [[height above average terrain]] (HAAT). In other words, these expressions (AGL, AMSL, HAAT) indicate where the "zero l ...

...'glossary of engineering terms''' is a list of definitions about the major concepts of [[engineering]]. Please see the bottom of the page for glossaries of spe ...de potential]]|content='''[[Absolute electrode potential]]'''}}{{defn|defn=In [[electrochemistry]], according to an [[IUPAC]] definition,<ref>[https://go ...

...m³ is sometimes quoted as a commonly used criterion and is used in the body of this article. ...harmless (such as [[ruthenium]], silver and [[indium]]), but can be toxic in larger amounts or certain forms. Other heavy metals, such as [[arsenic]], [ ...