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...r/academie/membre/Laskar_Jacques.htm |date=2012-04-30 }} at French Academy of Sciences</ref> ...al mechanics, finishing his thesis in 1984. He became a CNRS researcher at the [[Bureau des Longitudes]] in 1985. ...

{{Short description|Ratio of gravitational forces on a satellite from the Sun and host planet}} ...ral satellite]]. The term was coined by [[Isaac Asimov]] in ''The Magazine of Fantasy and Science Fiction'' in 1963.<ref name="Asimov">{{cite book |first ...

{{Short description|Unit of measurement in astronomy}} ...} in The Astrophysical Journal, 713, p. 816</ref> and in practice, this is the observable characteristic defining one zodi. ...

| image= Orbit of 2005 HC4.gif | [[List of Mercury-crossing minor planets|Mercury Crosser]] ...

{{Short description|Two objects on opposite sides of the celestial sphere}} [[File:Positional astronomy.svg|thumb|400px|Diagram of [[positional astronomy]]]] ...

...d our Solar System|website=Exoplanet Exploration: Planets Beyond our Solar System|access-date=2018-07-03}}{{dead link|date=June 2021|bot=medic}}{{cbignore|bo ...lanets-sub-jupiter-type/|title=HD 89345b and HD 286123b, two exoplanets of the sub-Jupiter type are discovered in orbits around bright stars - Upcosmos.co ...

...sical constant used to calculate the equatorial magnetic field strength of planets. This constant, introduced by Armen Markarian, shows a direct relationship The formula for calculating the magnetic field ''B'' at the equator of a planet is as follows:<math display="block">B=\frac{V_e*V_o*m*\vartriangle ...

...2015 he was an [[emeritus]] professor of [[astronomy]] at the [[University of California, Berkeley]]. ...ry]], where he performed [[Spectroscopy|spectroscopic]] studies of [[Solar System]] [[planet]]s and smaller bodies. In 1964 Spinrad was invited to return to ...

| image = Kepler-90 MultiExoplanet System - 20171214.jpg ...he inner solar system. Kepler-90h is the outermost planet of the Kepler-90 system. ...

...Though differing in size and temperature, terrestrial planets of the Solar System were reported to have high Earth Similarity Index values – [[Mercury (plane ...It was designed to be a scale from zero to one, with Earth having a value of one; this is meant to simplify planet comparisons from large databases. ...

{{Short description|A measure for the size of planets and other Solar System objects}} ......528A..41L }}</ref> In the case of a sphere, the mean radius is equal to the radius. ...

{{Short description|Mira-type long period variable star in the constellation Corona Borealis}} |radius={{solar radius calculator|type=LT|5300|1800|decimals=-1}}{{efn|name=radius}} ...

...anus]]<ref>{{cite web |url=http://djm.cc/constellation.html |title=Finding the constellation which contains given sky coordinates |date=2 August 2008 |web ...rent magnitude]] of 18, is the faintest star with exoplanets discovered by the [[Transiting Exoplanet Survey Satellite]].<ref>{{Cite web |title=Planetary ...

[[File:IRS46 nasa.jpg|right|300px|thumb|Illustration of a dusty disk in orbit around a young star]] ...inner Solar System resulting in smaller terrestrial planets, a small mass of [[Mars]] and a low mass asteroid belt. ...

...structure, composition, and dynamics of planets and moons within a stellar system. ...k R. |date=July 1978 |title=Planetesimals to planets: Numerical simulation of collisional evolution |url=https://linkinghub.elsevier.com/retrieve/pii/001 ...

{{short description|Lowest possible mass of the celestial object}} ...viewer's line-of-sight and the Doppler spectroscopy method will not detect the planet at all. ...

{{Short description|Theory to explain slowing of a star's spin}} ...oint <math> r_c </math> escape the magnetic field lines and thus take away the Sun's angular momentum.]] ...

{{Short description|F-type main sequence star in the constellation Virgo}} ...emperature and <math>\begin{smallmatrix}\sigma \end{smallmatrix}</math> is the [[Stefan–Boltzmann constant]].</ref> ...

| caption = An artist's impression of Gliese 667 Cc | discovery_method = [[Methods of detecting extrasolar planets#Radial velocity|Radial velocity]] ([[European Southern Observatory]]) ...

...ur Sun ([[Exoplanet|exoplanets]]). This is a nascent field of study due to the challenges in directly observing their [[Atmosphere|atmospheres]]. ...offers insights into the diverse climates that may exist beyond our solar system. ...