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'''C/1980 E1''' is a [[non-periodic comet]] discovered by [[Edward L. G. Bowell]] on 11 February 1980 and which *[[List of hyperbolic comets]] ...

| title= Destruction of Long-period Comets {{Comets}} ...

...ttps://web.archive.org/web/20110617092654/http://spaceobs.org/en/asteroids-comets/faq/ |url-status=dead }}</ref> but more recent estimates place the pre-brea |title = International Visual Observations of Comets (I.V.O.C.) ...

...name="GC1680"/> Further observations of ISON, however, showed that the two comets are not related.<ref name="Kirch"/> ...f name="sekharandasher2013"/> In addition, meteor showers from long-period comets that make just one pass into the inner solar system are very rare, if ever ...

{{For|other comets discovered by the Siding Spring Observatory|Comet Siding Spring (disambigua Comet Siding Spring passed [[Astronomy on Mars#Comets and meteors|extremely close]] to [[Mars]] on 19 October 2014 at 18:28 ± 0:0 ...

...ucted research confirming that <math>k=2</math> for the delta effect for [[comets]]. He has written four books – two about [[Association football|football]] ...s as an independent scholar, including work with exoplanets, brown dwarfs, comets and Mars. He was a member of South Yorkshire's [[Mexborough and Swinton Ast ...

...<math>\dot\omega=0</math>, the motion of <math>\omega(t)</math> must be a periodic motion around each cycle. ...<math>\dot\omega=0</math>, the motion of <math>\omega(t)</math> must be a periodic motion around each cycle. ...

...tley, South Australia|page=25}}</ref> Babylonians were able to make use of periodic appearances of the Moon to generate a time source - a calendar. This was de ...e stars are just a highly dense vapour that floats freely in space with no periodic motion.<ref>{{Cite book|title=Early astronomy|last=Thurston|first=Hugh|publ ...

...isher=NPR|access-date=8 October 2011}}</ref> and it is possibly present in comets.<ref>{{cite web|title= The cosmic ice laboratory – Cometary molecules|url=h ...nown as sulfanido for a ligand or sulfanide as an anion. Further down the periodic table, HSe^• is known as selanyl, and HTe^• is termed t ...

...5–1848), astronomer, discovered a number of [[comet]]s, including periodic comets [[54P/de Vico-Swift-NEAT]] and [[122P/de Vico]] ...did extensive research on the element [[technetium]], the last gap in the periodic table and the first element produced artificially ...

...tion]] to analyze several earlier cometary sightings. He observed that the comets of 1531, 1607, and 1682 had very similar orbital elements, and he theorized ...ast1=Whipple |first1=F.L. |title=A Comet Model. II. Physical Relations for Comets and Meteors. |journal=Astrophysical Journal |date=May 1951 |volume=113 |pag ...

...milar to how the aphelion distances of [[Short-period comet|Jupiter-family comets]] cluster near its orbit.<ref name=Millholland_Laughlin_2017/><ref name=For ...e distances to the ascending nodes of the ETNOs, and those of centaurs and comets with large semi-major axes, may be [[bimodal]]. They suggest it is due to t ...

...dřejov Observatory]] in the Czech Republic. Dimorphos was detected through periodic dips in Didymos's brightness due to mutual [[eclipse]]s and [[occultation ( |conference = Asteroids, Comets, Meteors Conference 2023 ...

...mathematician and crystallographer, identified [[Periodic graph (geometry)|Periodic graph]] in geometry, the first to catalogue all of the 230 [[space groups]] *'''[[Nikolai Chernykh]]''', astronomer, discovered 537 [[asteroid]]s and 2 [[comets]] ...

...ant implications for the planets' climates. These interactions could force periodic or episodic full rotations of the planets' surfaces with respect to the sta ...and redistributing nutrients;{{sfn|Lingam|Loeb|2018b|p=972}} and stimulate periodic expansions of marine organisms similar to [[red tide]]s on Earth.{{sfn|Ling ...

...tatine-discoverer/|title=Astatine – Discoverer – Year of Discovery|website=periodic-table.org|date=11 November 2020}}</ref> ...'s origin, demonstrated by [[Giovanni Schiaparelli]] to be the remnants of comets. He also conducted studies on [[Binary star|double stars]], [[Mercury (plan ...