About the Book
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 20. Chapters: List of maria on the Moon, Mare Imbrium, Oceanus Procellarum, Lunar mare, Mare Tranquillitatis, Mare Orientale, Lacus Veris, Mare Serenitatis, Mare Moscoviense, Sinus Medii, Lacus Felicitatis, Mare Marginis, Sinus Iridum, Mare Crisium, Lacus Somniorum, Mare Humboldtianum, Mare Vaporum, Mare Nectaris, Palus Epidemiarum, Mare Nubium, Mare Humorum, Mare Undarum, Mare Insularum, Mare Australe, Mare Ingenii, Mare Smythii, Mare Fecunditatis, Lacus Excellentiae, Mare Frigoris, Mare Cognitum, Sinus Lunicus, Lacus Autumni, Sinus Roris, Palus Putredinis, Mare Anguis, Lacus Mortis, Lacus Solitudinis, Palus Somni, Sinus Amoris, Lacus Aestatis, Mare Spumans, Lacus Spei, Lacus Temporis, Sinus Honoris, Sinus Aestuum, Sinus Asperitatis, Mare Desiderii, Sinus Successus, Lacus Bonitatis, Sinus Concordiae, Lacus Perseverantiae, Lacus Timoris, Lacus Hiemalis, Lacus Lenitatis, Sinus Fidei, Lacus Gaudii, Lacus Doloris, Lacus Odii, Lacus Oblivionis, Lacus Luxuriae. Excerpt: The lunar maria (singular: mare ) are large, dark, basaltic plains on Earth's Moon, formed by ancient volcanic eruptions. They were dubbed maria, Latin for "seas," by early astronomers who mistook them for actual seas. They are less reflective than the "highlands" as a result of their iron-rich compositions, and hence appear dark to the naked eye. The maria cover about 16 percent of the lunar surface, mostly on the near-side visible from Earth. The few maria on the far-side are much smaller, residing mostly in very large craters. The traditional nomenclature for the Moon also includes one oceanus (ocean), as well as features with the names lacus (lake), palus (marsh) and sinus (bay). The latter three are smaller than maria, but have the same nature and characteristics. The ages of the mare basalts have been determined both by direct radiometric dating and by the techni...
