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{{short description|Second brightest naked-eye comet of 2020}} {{Use mdy dates|date=May 2020}} ...

| caption = Peter Jalowiczor in his study (taken 2010) showing PCs set-up for the analysis of extrasolar pl ...ucted research confirming that <math>k=2</math> for the delta effect for [[comets]]. He has written four books – two about [[Association football|football]] ...

...escription|Interstellar comet passing through the Solar System, discovered in 2019}} {{redirect|Comet Borisov|other comets discovered by Gennadiy Borisov|List of comets discovered by Gennadiy Borisov}} ...

...2I/Borisov]] comet, the second confirmed interstellar object, photographed in late-2019 beside a distant galaxy]] ...g the first interstellar interloper|journal=Nature Astronomy|date=13 April 2020|volume=4|issue=9|issn=2397-3366|pages=835–836|doi=10.1038/s41550-020-1064-9 ...

...The inclination of Planet Nine's orbit weakens this protection, resulting in a chaotic variation of semi-major axes as objects hop between resonances. T ...nge:circulating. Crossing orbits above black line.{{efn-ua|Similar figures in articles by Beust<ref name="Beust_2016" /> and Batygin and Morbidelli<ref n ...

...oduced by the Minor Planet Center}}{{For|the quantification of uncertainty in general|Measurement uncertainty}}[[File:NEA-sizes-vs-uncertainties-compact. ...e"/> The ''U'' value should not be used as a predictor for the uncertainty in the future motion of [[near-Earth object]]s.<ref name="MPC-Uncertainty"/> ...

...lFuture" >{{Cite journal|last = Mautner |first = Michael N. | title = Life in the cosmological future: Resources, biomass and populations | journal = Jo ...]]'' by [[Olaf Stapledon]], first published in 1930. It details the manner in which the last humans, upon discovering that the [[Solar System]] will soon ...

...cess-date=February 16, 2020 |people=[[Derek Muller]] }}</ref> and included in standard physics textbooks such as [[Classical Mechanics (Goldstein)|''Clas ...r to the handle (ê₂ in the diagram), and then catch the handle. In almost all cases, during that rotation the face will also have completed a ...

...m the outer regions of the [[asteroid belt]], approximately 4.6 kilometers in diameter. ...tist Christophe Dumas. The asteroid's [[minor-planet moon]] was discovered in 2004.<ref name="Tamblyn-2004" /> ...

...ement in March 2018, it was the third most distant observed natural object in the [[Solar System]], after [[Eris (dwarf planet)|Eris]] and {{mpl|2014 UZ| ...quires an [[observation arc]] of several years to refine the uncertainties in the approximately 700-year [[orbital period]] and determine whether it is c ...

...atch]] program at [[Kitt Peak National Observatory]] near Tucson, Arizona, in the United States.<ref name="MPC-object"/> ...r 2020, the asteroid was removed from the Sentry risk table on 19 November 2020. ...

{{Short description|Interstellar object passed near Earth in 2017}} ...sive 4.2 meter diameter telescope is tracking the rapidly moving A/2017 U1 in the field of view. |url-status=live}}</ref>}} ...

.... The models of the Solar System throughout history were first represented in the early form of [[Cave painting|cave markings]] and drawings, [[calendar] ...previous models, thus, the early models are kept track of by intellectuals in astronomy, an extended progress from trying to perfect the [[Geocentric orb ...

{{Distinguish||text=the [[Planet X]] proposed in 1906 by [[Percival Lowell]]}} {{About|the hypothetical planet first suggested in 2014|the dwarf planet previously classified as the Solar System's ninth pla ...

...|PR]]; and [[Ondrejov Observatory]], Ondřejov, [[Czech Republic|CZ]]. <!-- In addition to those institutions, team members were affiliated with < ! - - ¿ | named_after = Greek word for "having two forms"<ref name=IAU-2020-06-23/> ...

...electron microscope]] (SEM) photo of a dust particle collected by [[NASA]] in the [[stratosphere]] together with its [[energy-dispersive X-ray spectrosco ...n in order to obtain information on the [[astronomical object]]s occurring in [[outer space]]. Dust astronomy overlaps with the fields of [[Planetary sci ...

...Comet or meteoroid streams, and even [[interstellar dust]] were identified in the data. ...elios orbit the spacecraft was in [[Conjunction (astronomy)|conjunction]] (in front or behind the Sun) and no data transmission was possible for a few we ...

{{Short description|Dwarf planet in the scattered-disc}} | epoch = 17 December 2020 ([[Julian day|JD]] 2459200.5) ...

...|Reaka-Kudla|Wilson|Wilson|1997|pp=132–33}} In turn, technology may result in the [[extinction of humanity]], leaving the planet to gradually return to a ..., Earth's axial tilt may begin to undergo chaotic variations, with changes in the axial tilt of up to 90°.<ref name=aaa318/> ...

...geology until the ''[[Voyager 2]]'' spacecraft flew by the Neptune system in 1989, marking the first and only up-close observations of the moon as of 20 ...roviding adequate heat alongside heat generated from [[radioactive decay]] in its core to maintain a subsurface ocean at present.<ref name="Nimmo2015"/>< ...