Editing Mare Undarum (section)

{{Infobox Lunar mare
 | name        = Mare Undarum
 | image       = Mare Undarum (LRO).png
 | caption     = [[Lunar Reconnaissance Orbiter|LRO]] mosaic of Mare Undarum
 | eponym      = Sea of Waves
 | coordinates = {{coord|7.49|N|68.66|E|globe:moon_type:landmark|display=inline,title}}<ref name=USGS/>
 | diameter    = {{val|244.84|u=km}}<ref name=USGS/>
}}

'''Mare Undarum''' {{IPAc-en|V|n|'|d|ɛər|@|m}} (Latin ''undārum'', the "sea of waves") is a shallow, irregular [[lunar mare]] located just north of [[Mare Spumans]] on the lunar near side, between the crater [[Firmicus (crater)|Firmicus]] and the eastern limb. It lies within a trough between the third and fourth raised rings formed by the impact that created the [[Mare Crisium]].<ref name=DeHon1975/> The selenographic [[coordinate]]s of this mare are 7.5° N, 68.7° E. It has a maximum diameter of 245 km.<ref name=USGS/>

There are five known [[lunar dome]]s within the mare.<ref name=Lena_et_al_2008/> The surrounding basin material is of the [[Nectarian]] [[epoch (geology)|epoch]], with the mare [[basalt]] being of the [[Upper Imbrian]] epoch. The crater [[Dubyago (crater)|Dubyago]] can be seen on the southern edge of the mare. On the northeastern edge of the mare is the crater Condorcet P.

When [[Johann Heinrich von Mädler|Mädler]] observed this area in the 1830s, he noted variations in the curved dark streaks that form this mare, leading him to speculate that the changes were caused by vegetation.