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...986 | title = Collective relaxation of stellar systems | url = | journal = Astronomy & Astrophysics | volume = 160 | issue = | page = 203 | bibcode = 1986A&A... ...= 1994| title = Ergodic Concepts in Stellar Dynamics |series=Lecture Notes in Physics, 430|publisher= Springer |isbn=978-3-662-13986-8}}</ref><ref>{{cite ...

<!--Removed sections have been commented out instead of deleted, in case they can be improved and put back into the article.--> ...of the applications of astrophysical fluid dynamics include dynamics of [[stellar systems]], [[accretion disks]], [[astrophysical jet]]s,<ref>Smith, Michael ...

...nation correction<ref name=ofek2012/>). Instrumental magnitude is defined in various ways, and so when working with instrumental magnitudes, it is impor ...ired for any instrumental magnitudes that are employed. The factor of 2.5 in the above formula originates from the established fact that the human eye c ...

A '''hypercompact stellar system''' ('''HCSS''') is a dense [[star cluster|cluster of stars]] around ...ravitational force from the supermassive black hole keeps the stars moving in very tight orbits about the center of the cluster. ...

...escription|Scatter plot of stars showing the relationship of luminosity to stellar classification}} ...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 ...

{{Short description|Change in the apparent position of celestial bodies when seen from two different posi [[File:ParallaxV2.svg|thumb|Stellar parallax motion from annual parallax. Half the apex angle is the parallax a ...

{{redirect-distinguish|Space velocity (astronomy)|radial velocity|proper motion|peculiar velocity}} ...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 ...

...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 ...

'''Yves Pomeau''', born in 1942, is a French [[mathematician]] and [[physicist]], emeritus research di ...70. After his thesis, he spent a year as a postdoc with [[Ilya Prigogine]] in Brussels.<ref>{{cite journal|title=Introduction: Pattern formation at the t ...

...[[Ptolemy's table of chords|calculation of chords]], while mathematicians in India created the earliest-known tables of values for trigonometric ratios ...: with its application to navigation and surveying, nautical and practical astronomy and geodesy, with logarithmic, trigonometrical, and nautical tables|url=htt ...

{{short description|Structure formed by diffuse material in orbital motion around a massive central body}} ...ivistic beaming|relativistic effects]] imposed on light when it is emitted in [[Gravitational singularity|regions]] subject to extreme [[Gravitational fi ...

...of [[mass–energy]]. A stationary [[Field (physics)|field]] is one that is in a steady state, but the masses causing that field may be non-static ⁠— rota ...on its rotation. The Lense–Thirring effect is very small – about one part in a few trillion. To detect it, it is necessary to examine a very massive obj ...

{{Short description|Region in spacetime from which nothing can escape}} ...4''', 133–153 (2002), doi: 10.1023/A:1015347106729] |title=Visual Horizons in World Models |journal=Monthly Notices of the Royal Astronomical Society |da ...

The following list is composed of objects, concepts, phenomena and processes that were discovered or invented by people from th ...ossils of ''Pithecanthropus erectus'' (now ''Homo erectus'') found in Java in 1891. Estimated to be between 700,000 and 1,000,000 years old, at the time ...

...sity]] is very low: {{val|7e-30|u=g/cm3}} ({{val|6e-10|u=J/m³}} in [[mass-energy]]), much less than the density of ordinary matter or dark mat ...entists thought that the gravitational attraction of [[matter]] and energy in the universe would cause the universe's expansion to slow over time. Since ...

{{Short description|Problem in physics and celestial mechanics}} {{About|the problem in classical mechanics|the problem in quantum mechanics|Many-body problem|engineering problems and simulations in ...

...erary language by combining [[Old Church Slavonic]] with vernacular tongue in his early grammar; influenced [[Russian poetry]] through his [[ode]]s ...ed earth]] technology for northern climate and built the [[Priory Palace]] in [[Gatchina]], pioneered [[HVAC]] technology, invented [[carton-pierre]] ...

| image4 = Space Shuttle Atlantis in the sky on July 21, 2011, to its final landing.jpg | image5 = Fire in a fire pit.jpg ...

{{Short description|Overview of scientific and technological developments in Iran/Persia}} ...using its [[safir (rocket)|own launcher]] and the sixth to send [[animals in space]].]] ...

...inantly for scientific purposes. The kelvin is one of the seven base units in the [[International System of Units]] (SI). ...it can be approached very closely but not actually reached, as recognized in the [[third law of thermodynamics]]. It would be impossible to extract ener ...