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...ughnut]] shape. While no firm theoretical understanding as to how toroidal planets could [[Planetary formation|form naturally]] is necessarily known, the shap ...d matter such as the typical [[silicate]]-[[ferrous]] composition of rocky planets [[Lane–Emden equation|behaves fluidly]], and satisfies the condition for ev ...

| exosolar planets = ...ability of natural satellites|habitability]] is instead considered for its hypothetical exomoons.<ref>{{Cite web |last=Cowing |first=Keith |date=2024-09-20 |title= ...

...ini|author10= D. Segransan|title=The HARPS search for southern extra-solar planets. XIII. A planetary system with 3 Super-Earths (4.2, 6.9, & 9.2 Earth masses ...ess massive than the [[Sun]]. The star has six known [[extrasolar planet|planets]], three discovered in 2008<ref name=sb /><ref name=msnbc>{{cite web |url=h ...

== Hypothetical planet == {{OrbitboxPlanet hypothetical ...

...many colors are needed to color political maps of the Earth and Moon, in a hypothetical future where each Earth country has a Moon colony which must be given the s ...has been extended to analogous problems of coloring maps on any number of planets. For this extension the [[lower bound]]s and [[upper bound]]s on the number ...

...to [[Romulus]] the founder of [[Rome]], but also alluding to the fictional planets of [[Vulcan (Star Trek planet)|Vulcan]] and [[Romulans#Homeworld|Romulus]] ...net]] inside the orbit of Mercury, as well as having given its name to the hypothetical [[vulcanoid]]s.<ref name="Marcia Dunn" /><ref>{{cite web |publisher=[[SPACE ...

...''' and the '''normal color index''' (or '''intrinsic color index'''), the hypothetical true color index of the star, unaffected by extinction. Color indices can also be determined for other celestial bodies, such as planets and moons: ...

The hypothetical [[Planet Nine]] would modify the orbits of extreme trans-Neptunian objects ...the perihelia of their orbits decline, causing them to encounter the other planets, leading to their ejection.<ref name="Khain_etal_2018">{{cite journal|last1 ...

...of the light curve are likely to help confirm the presence of one or both planets.<ref name="Qian"/> A 2022 study found that at least the 2012 model fails to [[Category:Hypothetical planetary systems]] ...

{{Short description|Hypothetical object}} '''Antimatter comets''' and '''antimatter meteoroids''' are hypothetical [[comet]]s and [[meteoroid]]s composed solely of [[antimatter]] instead of ...

The '''skin temperature of an atmosphere''' is the temperature of a hypothetical thin layer high in the [[atmosphere]] that is transparent to incident [[Sun ...

...d to detect an orbiting object. These observations further constrained the hypothetical object to be 5–20 times the mass of Jupiter, orbiting between 10 and 20 AU ...ane]], [[carbon dioxide]], and [[carbon monoxide]] commonly found in giant planets. This might be confirmed in the future with a spectrum. Alternatively this ...

{{Short description|Hypothetical airship that is evacuated rather than filled with a lighter-than-air gas}} A '''vacuum airship''', also known as a '''vacuum balloon''', is a hypothetical [[airship]] that is [[Vacuum|evacuated]] rather than filled with a lighter- ...

{{Short description|Hypothetical spacecraft propulsion concept using external force fields momentum for tran ...ield|gravitational]] and [[Magnetic field|magnetic fields]] from stars and planets. Proposed drives that use field propulsion are often called a [[Reactionles ...

...in [[solar sails]], precise [[astrometry]], the discovery of [[extrasolar planets]], [[extremophiles]] and microbial [[genetic engineering]]. [[Cosmological] ...scous drag at the target, and capture of the colonizing micro-organisms by planets. A possible objection is potential interference with local life at the targ ...

...hat of the Earth's and the Sun's diameter is about 10 times Jupiter's. The planets are not shown at the appropriate distance from the Sun.]] ...Near East, believed the sky was a solid dome with the [[Sun]], [[Moon]], [[planets]] and [[stars]] embedded in it.<ref>{{cite journal |journal=Westminster The ...

...e object's unusually high [[proper motion]] while searching for [[Nemesis (hypothetical star)#Past, current, and pending searches for Nemesis|potential binary comp ...hosphate clouds exist. This would make it similar to class III (cloudless) planets on the [[Sudarsky's gas giant classification|Sudarsky]] scale ...

The first interstellar objects discovered were [[rogue planet]]s, planets ejected from their original stellar system (e.g., [[OTS 44]] or [[Cha 11091 ...a host star and have become unbound since. Different processes can cause planets and smaller objects (planetesimals) to become unbound from their host star. ...

{{Short description|Hypothetical Solar System planet}} {{About|the hypothetical planet first suggested in 2014|the dwarf planet previously classified as th ...

...jectile]]s, parts of [[Machine (mechanical)|machinery]], [[spacecraft]], [[planets]], [[star]]s, and [[galaxies]]. The development of classical mechanics invo ...chanics]].) Objects with non-zero size have more complicated behavior than hypothetical point particles, because of the additional [[degrees of freedom (physics an ...