Palimpsest (planetary astronomy): Difference between revisions - Wikipedia

Line 1:

{{Short description|Astronomical geographical feature}}

<!--The following text was taken from the existing "Palimpsest" article. It was thought that a specific article should be generated, as there are more and more references to palimpsests as we investigate planets and their moons. -->

[[File:Memphis Facula.gif|right|thumb|''[[Voyager 2]]'' image of [[Memphis Facula]] (white patch at lower right) on [[Ganymede (moon)|Ganymede]]]]

A '''palimpsest''' {{IPAc-en|'|p|ae|l|ᵻ|m|p|s|E|s|t}}, in [[Planetary science|planetary astronomy]], is an ancient [[Impact crater|crater]] onthat anhas [[icybeen moon]]degraded ofover thetime. [[SolarThey System#Outermay Solaralso System|outerbe Solar System]] whose [[relief]] has disappeared duereferred to creepas of"ghost thecraters", icy"degraded surfacecraters", ("viscousburied relaxationcraters"), or subsequent"pathological [[cryovolcanic]]craters". outpourings,Palimpsests leavinghave abeen circularidentified albedoon featureMercury, perhapsthe withEarth, athe "ghost"Moon, ofMars, aGanymede, rim.Callisto, [[Ice|Icy]]and surfacespossibly ofeven naturalTitan. satellitesOn likeMars, [[Callistothese (moon)|Callisto]]features andare [[Ganymedemorphologically (moon)|Ganymede]]described preserveas hintscraters ofthat theirare history"flat-floored, inrimless, theseextremely rings.shallow, Awithout typicalcentral examplepeaks, isand [[Memphiswould Facula]]probably onrepresent Ganymede,what aremains 340after kmerosion."<ref wide palimpsest.name=Barata_et_al_2012/>

On an [[icy moon]] of the [[Solar System#Outer Solar System|outer Solar System]], a palimpsest is a crater whose [[relief]] has disappeared due to creep of the icy surface ("viscous relaxation") or subsequent [[cryovolcanic]] outpourings, leaving a circular albedo feature, perhaps with a "ghost" of a rim. [[Ice|Icy]] surfaces of natural satellites like [[Callisto (moon)|Callisto]] and [[Ganymede (moon)|Ganymede]] preserve hints of their history in these rings. A typical example is [[Memphis Facula]] on Ganymede, a 340 km wide palimpsest.<ref name=Harland2000/>

==See also==

Line 9 ⟶ 12:

==References==

{{Reflist|refs =

# {{Cite book

| last = Harland | first = D. M. | authorlink =

<ref name=Barata_et_al_2012>{{cite journal

| title = Jupiter Odyssey | publisher = [[Springer Science+Business Media|Springer Praxis]]

| title=Characterization of palimpsest craters on Mars

| series = | edition = 1st | date = 2000-11-10 | location =

| last1=Barata | first1=T. | last2=Alves | first2=E. I.

| pages = 448 (see pp. 136–137) | language =

| last3=Machado | first3=A. | last4=Barberes | first4=G. A.

| url = http://google.com/books?id=QtxVTDhrRAEC&pg=PA136

| journal=Planetary and Space Science

| id = | isbn = 978-1-85233-301-0 | mr = | zbl = | jfm = | oclc = 44461919}}

| volume=72 | issue=1 | pages=62–69 | date=November 2012

| doi=10.1016/j.pss.2012.09.015 | bibcode=2012P&SS...72...62B }}</ref>

<ref name="Harland2000">{{Cite book |last=Harland |first=D. M. |url=http://google.com/books?id=QtxVTDhrRAEC&pg=PA136 |title=Jupiter Odyssey |date=2000-11-10 |publisher=[[Springer Science+Business Media|Springer Praxis]] |isbn=978-1-85233-301-0 |edition=1st |pages=136–137 |oclc=44461919 |ol=OL8974104M}}</ref>

}}

[[Category:Space science]]

Line 21 ⟶ 30:

[[Category:Surface features of bodies of the Solar System]]

[[Category:Impact craters]]

{{Planetary-geology-stub}}