Editing Lineae (section)

{{short description|Long markings on a planet or moon}}
{{Other|La Linea (disambiguation){{!}}La Linea}} 
[[File:PIA00295 Europa dark bands.jpg|thumb|right|Low resolution view of lineae on Europa]]
'''Linea''' {{IPAc-en|ˈ|l|ɪ|n|iː|ə}} (plural: '''lineae''' {{IPAc-en|'|l|I|n|ᵻ|iː}}) is [[Latin]] for 'line'.<ref>[[NASA]]: [https://www.nasa.gov/image-feature/jpl/pia19918/recurring-lineae-on-slopes-at-horowitz-crater/ Sep 28 2015 Recurring Lineae on slopes at Horowitz Crater]</ref> In [[planetary geology]] it is used to refer to any long markings, dark or bright, on a [[planet]] or [[natural satellite|moon]]'s surface. The planet [[Venus]] and Jupiter's moon [[Europa (moon)#Lineae|Europa]] have numerous lineae; Saturn's moon [[Rhea (moon)|Rhea]] and the dwarf planet [[Pluto]] have several.<ref>{{Cite encyclopedia |title=Europa |encyclopedia=Encyclopedia of Astrobiology |publisher=Springer |location=Berlin |url=https://books.google.com/books?id=oEq1y9GIcr0C&pg=PA512 |last=Encrenaz |first=Therese |date=2011 |editor-last=Gargaud |editor-first=Muriel |series=Springer Reference |volume=1 |page=512 |isbn=978-3-642-11271-3 |oclc=537271559 |quote=The most striking features of Europa's surface are the series of dark streaks, called “lineae” that crisscross the whole globe |editor2-last=Amils |editor2-first=Ricardo |editor3-first=Henderson James |editor-last3=Cleaves |display-editors=1}} </ref><ref>{{Cite book |last=Hall III |first=James A. |title=Moons of the Solar System: from Giant Ganymede to Dainty Dactyl |date=2015 |publisher=Springer |isbn=978-3-319-20636-3 |series=Astronomers' Universe |location=Cham Heidelberg |page=[https://books.google.com/books?id=HgmVCgAAQBAJ&pg=PA93 93] |bibcode=2016mss..book.....H |doi=10.1007/978-3-319-20636-3|quote=Lineae: The lineae are lines that cross the surface}}</ref>

On [[Mars]], [[Seasonal flows on warm Martian slopes|recurring slope lineae]] form seasonally on warm Martian slopes as dark downhill streaks, growing during warm seasons and fading in cold seasons. They are thought to be either caused by salty liquid water flows during warm months, or dry grains flowing down in a kind of landslide.
[[File:Oblique View of Warm Season Flows in Newton Crater.jpg|thumb|Recurring slope lineae as seen on [[Newton (Martian crater)|Newton crater]] of Mars.]]