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..., the '''quadrupole formula''' describes the rate at which [[gravitational wave]]s are emitted from a system of masses based on the change of the (mass) [[ ...ation of the metric, i.e. the gravitational wave. <math> G </math> is the gravitational constant, <math> c </math> the speed of light in vacuum, and <math>I_{ij}</ ...

{{Short description|Gravitational wave detection tool}} ...background).<ref name=":1">{{Cite web |title=Evidence for a Gravitational-Wave Background {{!}} NANOGrav |url=https://nanograv.org/15yr/Summary/Background ...

...s-sectional area.<ref name=":0">{{Citation |last=Barnes |first=Rory |title=Gravitational Focusing |date=2011 |url=https://doi.org/10.1007/978-3-642-11274-4_670 |enc ...s2cid=119484707 |issn=1538-4357|doi-access=free |arxiv=1702.00279 }}</ref> Gravitational focusing plays a significant role in the formation of planets, as it shorte ...

...al decay|inspiral]] phase. In [[gravitational-wave astronomy|gravitational wave data analysis]], it is easier to measure the chirp mass than the two compon ...ate=April 1996 |doi=10.1088/0264-9381/13/4/002 |arxiv=gr-qc/9602024 |title=Gravitational waveforms from inspiralling compact binaries to second-post-Newtonian order ...

{{short description|Gravitational wave observation}} ...initially '''S190521g''')<ref name="PRL-20200902" /> was a [[gravitational wave]] signal resulting from the merger of two [[black hole]]s. It was possibly ...

...dom walk]] in orientation of a [[binary star]]'s orbital plane, induced by gravitational perturbations from passing stars. the latter expression is valid in the limit that [[gravitational focusing]] dominates the encounter rate. The rate of encounters with stars ...

...017 |title=Challenges to Cosmic Self Acceleration in Modified Gravity from Gravitational Waves and Large-Scale Structure |url=https://www.youtube.com/watch?v=b-tTcL ...Cosmology and Gravitation, University of Portsmouth]] and the Institute of Astronomy, [[Royal Observatory Edinburgh]], [[University of Edinburgh]]. He joined th ...

...with ordinary star clusters of similar [[luminosity]]. This is because the gravitational force from the supermassive black hole keeps the stars moving in very tight ...m the theory of [[binary black hole#Black-hole merger recoil|gravitational wave recoil]], and would prove that supermassive black holes can exist outside g ...

...trasting meridional structures of stratospheric and tropospheric planetary wave variability in the northern hemisphere, Tellus A, 66 (2014)</ref> [[Category:Equations of astronomy]] ...

...the '''Lyth argument''' places a theoretical upper bound on the amount of gravitational waves produced during inflation, given the amount of departure from the hom * During slow-roll inflation, the ratio of gravitational waves to inhomogeneities of the [[Cosmic microwave background|CMB]] is corr ...

...ns governing fluid mechanics.--><ref>University of Cambridge Department of Astronomy. Part II Astrophysical Fluid Dynamics [http://www.ast.cam.ac.uk/students/u ...iscs]] of galaxies. Since supersonic motions almost always involve [[shock wave]]s, shock waves must be accounted for in calculations. The galaxy also cont ...

{{Short description|Gravitational-wave astronomy technique}} ...onomers are now seeking to pinpoint the origins of an exciting new form of gravitational waves that was announced earlier this year.}}</ref> ...

...nstellation)|Taurus]]. It was discovered in 2007 with the [[National Radio Astronomy Observatory]]'s [[Robert C. Byrd Green Bank Telescope]] in a drift-scan sur ...a measurement of the orbital decay due to the emission of [[gravitational wave]]s, as observed for [[PSR B1913+16]] and [[PSR J0737−3039]]. ...

...ld Theory|quantum fields]] and [[gravitational memory effect|gravitational wave memories]]. ...es of spacetime seen by observers located far away from all sources of the gravitational field, would be to extend and reproduce the symmetries of flat spacetime of ...

...of compact objects in binary mergers is a key goal of [[gravitational-wave astronomy]]. ...

...round experiments|experiments]]. They aim to measure the [[Polarization in astronomy|polarization]] of the CMB; in particular, measuring the [[B-modes|''B''-mod [[File:History of the Universe.svg|thumb|left|200px|[[Gravitational waves]] may arise from [[Inflation (cosmology)|inflation]], a phase of [[ac ...

...rbital periods. But after roughly one [[relaxation (physics)#Relaxation in astronomy|relaxation time]], most of the stars in the nucleus will have exchanged ene ...of roughly one-fifth the supermassive black hole's [[sphere of influence (astronomy)|influence radius]]. ...

...elativity]] predicts their orbits are gradually decaying due to emitting [[gravitational waves]], which will eventually lead to a [[neutron star merger]] and a [[ki ...quatorial coordinate system|equatorial coordinates]] based on the [[Epoch (astronomy)#Julian dates and J2000|J2000 epoch]] are [[Right ascension|RA]] {{RA|19|46 ...

...named in honor of [[Loránd Eötvös]], Gundlach did research in experimental gravitational physics. With his colleagues he searched for the confirmation or refutation ...theeshkumar |first1=V. H. |last2=Suresh |first2=P. K. |journal=Advances in Astronomy |volume=2011 |pages=1–12 |arxiv=hep-th/0606194 |bibcode=2011AdAst2011E..14S ...

...orking Group |title=Science with the space-based interferometer eLISA. II: Gravitational waves from cosmological phase transitions |journal=JCAP |date=2016 |volume= ...ransition.<ref name="weir">{{cite journal |last1=Weir |first1=David |title=Gravitational waves from a first order electroweak phase transition: a brief review |jour ...