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...ctants. It determines the rates of [[nuclear fusion]] reactions that occur in the cores of [[star]]s. [[Category:Concepts in astrophysics]] ...

...=Rolfs |first1=C.E. |last2=Rodney |first2=W.S. |year=1988 |title=Cauldrons in the Cosmos |url=https://books.google.com/books?id=BHKLFPUS1RcC&pg=PA156|loc ...des, {{math|''v''}} is the magnitude of the relative incident [[velocity]] in the center-of-mass frame, {{math|''α''}} is the unitless [[fine-structure c ...

...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 ...

<!--Removed sections have been commented out instead of deleted, in case they can be improved and put back into the article.--> ...ns governing fluid mechanics.--><ref>University of Cambridge Department of Astronomy. Part II Astrophysical Fluid Dynamics [http://www.ast.cam.ac.uk/students/u ...

...[[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 ...

...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 ...

...istance between microscopic particles (usually [[atoms]] or [[molecules]]) in a macroscopic body. ...fails to define the parameter exactly. On the other hand, it is often used in qualitative statements where such a numeric factor is either irrelevant or ...

...ne approximation formula''' is a [[rational fraction|rational expression]] in one [[Variable (mathematics)|variable]] for the [[computation]] of the [[ap This [[formula]] is given in his treatise titled ''Mahabhaskariya''. It is not known how Bhāskara I arri ...

...nt from the 1-D case, because the multi-dimensional [[polynomials]] cannot in general be factored. This means that an arbitrary transfer function cannot ...n signal analysis and processing technology. Filters also play a main role in signal acquisition, transmission, processing and exchange. ...

...ite parameters to estimate the power spectrum of multidimensional signals. In this article, we will be looking into the basics of methods used to estimat ...Antenna (radio)|antennas]] and vibrational analysis. In the field of radio astronomy,<ref name="James"/> it is used to synchronize the outputs of an array of te ...

{{Short description|Celestial orbit whose trajectory is a conic section in the orbital plane}} ...[[Parametrization (geometry)|parametrized]] into six [[orbital elements]] in various ways. ...

...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 ...

...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 ...

...lain, and predict [[List of natural phenomena|natural phenomena]]. This is in contrast to [[experimental physics]], which uses experimental tools to prob ...eoretical formulation.<ref name="Ref_s">{{cite web|title = The Nobel Prize in Physics 1921|publisher =The [[Nobel Foundation]]|url = http://nobelprize.or ...

{{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 ...

{{Short description|Mathematical transformation in physics}} ...5|publisher=Penguin Books Limited|isbn=978-1-84614-702-9|chapter=3}}</ref> In mathematics, the set of all time translations on a given system form a [[Li ...

{{Short description|Notable events in the history of geometry}} ...he other [[Vedic civilization|Vedic]] "[[Sulba Sutras]]" ("rule of chords" in [[Sanskrit]]) use [[Pythagorean triples]], contain a number of geometrical ...

...branch of physics in which we study the object and properties of an object in form of a motion under the action of the force. ...that ''all things are made up of atoms – little particles that move around in perpetual motion, attracting each other when they are a little distance apa ...

{{Short description|Orbit in which natural drifting has been minimized}} .../display?_EXT_KNOVEL_DISPLAY_bookid=1586&VerticalID=0}}</ref> This results in a long-term stable orbit that minimizes the use of [[orbital station-keepin ...

...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 ...