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|orbit=[[Oort cloud]] '''C/2020 F8 (SWAN)''', or '''Comet SWAN''', is an [[Oort cloud]] [[comet]] that was discovered in images taken by the Solar Wind Anisotrop ...

{{Short description|Oort cloud comet}} | orbit = [[Oort cloud]] ...

[[Oort cloud]] comet [[C/2017 K2]] was announced when it had a short 2.6 day observation ...n arc of about 200 days to rule out a Mars [[Impact event|impact]] by Oort cloud comet [[C/2013 A1 (Siding Spring)]].<ref name=esa/> ...

...eous corona that surrounds the Milky Way. Inspired by this proposal, [[Jan Oort]], of Leiden University, Netherlands, proposed that cold gas clouds might b ...well as their slower-moving counterparts known as [[intermediate-velocity cloud]]s (IVCs). Several astronomers proposed hypotheses (which later proved to b ...

...tside Neptune's orbit. Far beyond this region is the vast spherical [[Oort cloud]] enshrouding the Solar System, whose presence was deduced from the orbits ...d to determine the outer limit of the Kuiper belt and directly detect Oort cloud objects out to 10,000&nbsp;AU. Such objects are too small to detect with cu ...

...have a stable source located beyond 1,000 astronomical units (in the Oort cloud) where they come from", notes Carlos de la Fuente Marcos. "But if they are ==Oort cloud and comets== ...

{{short description|Oort cloud comet}} | orbit = [[Oort cloud]] ...

Antimatter comets thought to exist in the [[Oort cloud]] were in the 1990s hypothesized as one possible explanation for [[gamma-ra ...|title=Gamma-Ray Bursts from Comet-Antimatter Comet Collisions in the Oort Cloud|url=http://link.aip.org./link/?APCPCS/384/744/1|last=Dermer|first=Charles D ...

| orbit = [[Oort cloud]] '''C/2013 A1''' ('''Siding Spring''') is an [[Oort cloud]] [[comet]] discovered on 3 January 2013 by [[Robert H. McNaught]] at [[Sid ...

| [[Comet ISON|C/2012 S1 (ISON)]]<br />(weakly hyperbolic<br />Oort Cloud comet) || {{cvt|0.2|km/s|au/years|2|disp=br}}<ref name="Note-1" /> ...e="Valtonen" /> [[Amir Siraj]] and [[Avi Loeb]] demonstrated that the Oort Cloud could have been formed from ejected planetesimals from other stars in the S ...

...he gravitational collapse of a pocket of matter within a [[giant molecular cloud]]. The infalling material possesses some amount of [[angular momentum]], wh ...d]]; only the inner [[Oort cloud]] has a toroid-like shape. The outer Oort cloud is more spherical in shape. ...

...ng | first1 = RP | last2 = Merrifield | first2 = MR | title = Refining the Oort and Galactic constants | journal = Monthly Notices of the Royal Astronomic ...alo stars and hypervelocity stars. High-velocity stars were studied by Jan Oort, who used their kinematic data to predict that high-velocity stars have ver ...

...Galaxy rotation curve|galactic rotation]] by [[Bertil Lindblad]] and [[Jan Oort]]. In 1924, Dutch astronomer [[Jan Oort]] [[:Category:Discoveries by Jan Oort|discovered]] the [[galactic halo]], a group of stars orbiting the [[Milky W ...

...ttps://web.archive.org/web/20210126014353/https://www.space.com/16401-oort-cloud-the-outer-solar-system-s-icy-shell.html |url-status=live }}</ref> and in 19 [[File:Oort_cloud_Sedna_orbit.svg|thumb|The presumed distance of the [[Oort cloud]] compared to the rest of the Solar System.]] ...

...ions without Planet Nine an insufficient number are produced from the Oort cloud relative to observations, however.<ref name="Kaib_etal_2019" /> A few of th ====Oort cloud and comets==== ...

...awai‘i and Chile (iotw2225c).jpg|thumb|upright=2|The [[interplanetary dust cloud]] illuminated and visible as [[zodiacal light]], with its parts the ''false ...ch in turn feed and maintain the [[interplanetary dust cloud|Zodiacal dust cloud]].<ref>{{cite journal |last1=Whipple |first1=F.L. |title=A comet model. I. ...

|+ Inbound velocity at 200&nbsp;AU from the Sun<br />compared to Oort cloud objects ...that star system, and it probably just passed through the system's [[Oort cloud]] at a relative speed of about {{cvt|15|km/s|mph kph|abbr=}}.<ref name="Por ...

...ance, 2I/Borisov's nucleus was surrounded by a [[Coma (cometary)|coma]], a cloud of dust and gas.<ref name=Greskno2019/> ...w-resolution) visible spectrum of 2I/Borisov was similar to typical [[Oort Cloud]] comets.<ref name=IAC/><ref name=deLeón2019/> Its [[color index]]es also r ...

...nificant reduction in the [[perihelion]] distances of comets in the [[Oort cloud]]—a spherical region of icy bodies orbiting within half a [[light-year]] of ...ns. Among the deleterious effects resulting from a major impact event is a cloud of fine dust ejecta blanketing the planet, blocking some [[Diffuse sky radi ...

...gravitationally [[Perturbation (astronomy)|perturb]] members of the [[Oort cloud]], a halo of icy bodies orbiting at the edge of the Solar System, thereafte ...[[star formation]] ends in galaxies as galaxies are depleted of the [[gas cloud]]s they need to form stars.<ref name="dying" /> ...