All articles starting with O

Otygen Corona

Otygen Corona is a 400-km-wide Type 1 corona on Venus at 57S, 30.5E in Lada Terra, named in 1991 for a Mongolian earth mother, with circumferential dyke swarms and the nearby Tsects Chasma rift.

Otyken

Otyken (OTYKEN) is a Siberian folk-pop group from Krasnoyarsk Krai, Russia, founded by producer Andrey Medonos, singing in Khakas, Chulym, and Dolgan with throat singing and traditional instruments.

Otylia Jędrzejczak, Polish swimmer born 1983, first Polish Olympic swimming champion (200 m butterfly, Athens 2004), two world titles, three 200 m butterfly world records, later president of the Polish Swimming Federation.

Ötzi

Ötzi, the Iceman or Similaun Man: a 5,300-year-old Copper Age glacier mummy found in 1991 by Erika and Helmut Simon on the Tisenjoch, South Tyrol, Italy; displayed in Bolzano, with 92% Anatolian farmer ancestry, dark skin, and an arrow-wound death.

Otzma Yehudit (אוצמה יהודית)

Otzma Yehudit (Jewish Power), far-right Israeli party led by Itamar Ben-Gvir, heir to Kahanist Kach; founded 2012, six Knesset seats since 2022, three ministers in the 37th government, briefly exited the coalition in January 2025.

Sep 21, 2026

Ou Chen

Ou Chen (陈鸥) is a materials chemist and Professor of Chemistry at Brown University, known for building the first single-component quasicrystalline nanocrystal superlattice, reported in Science in 2018.

Ou Isto ou Aquilo

Ou Isto ou Aquilo is a 1964 collection of 57 children's poems by the Brazilian writer Cecília Meireles, published in the year of her death.

Sep 19, 2026

Ou Jinfeng

Ou Jinfeng (欧锦锋, born 1978) is a Chinese businessman who founded Higold Group, a home hardware and outdoor furniture maker based in Shunde, Foshan, Guangdong, which listed on the Shenzhen Stock Exchange in 2025.

OU812

OU812: Van Halen's eighth studio album, released May 24, 1988 on Warner Bros., second with Sammy Hagar ("Van Hagar"), titled as a pun on David Lee Roth's Eat 'Em and Smile; hit number 1 on the Billboard 200, sold 4 million US copies, 4x Platinum.

Ouabain

Ouabain (strophanthin-G), C29H44O12, is a cardiotonic cardiac glycoside from Strophanthus gratus and Acocanthera, an Na+/K+-ATPase inhibitor once used intravenously for heart failure, not US-approved, and the namesake of the proposed adrenal hormone endogenous ouabain.

Ouachita Highlands

The Ouachita Highlands are the Ouachita Mountains of western Arkansas and southeastern Oklahoma, which with the Ozark Plateau form the U.S. Interior Highlands, with east-west ridges and elevations up to 839 m.

Ouachita Mountains

Ouachita Mountains: east-west fold-and-thrust belt in west-central Arkansas and southeastern Oklahoma, formed by the late Paleozoic Ouachita Orogeny (soft collision, ~280 Ma), part of the Appalachian-Ouachita-Marathon chain, home to Hot Springs National Park and Ouachita National Forest.

Ouachita Parish

Ouachita Parish, Louisiana: parish in northeastern Louisiana, seat Monroe, part of Monroe MSA. Formed 1807 as one of 19 original Territory of Orleans districts; 160,368 residents (2020); cities Monroe and West Monroe.

Ouachita River Lock and Dam No. 8

Ouachita River Lock and Dam No. 8 was a movable-wicket lock and dam on the Ouachita River at Calion, Arkansas, built by the U.S. Army Corps of Engineers in 1907 and 1916.

Ouadaï Region

Ouadaï (Ouaddaï, Dar Wadai) is an eastern Chadian province on the Sudan border, capital Abéché, former heart of the 1611 Wadai Sultanate; about 997,000 people, millet and trade economy, and a major destination of Sudanese refugees since 2023.

Ouadane

Ouadane (ودان) is a ruined medieval caravan town on the Adrar Plateau in northern Mauritania, once the most important commercial center of the west Saharan trade.

Ouagadougou

Ouagadougou (Ouaga) is the capital and largest city of Burkina Faso, population 2.5 million in 2015, founded by the Mossi in the 12th century, on the Abidjan railway, facing rapid growth, sanitation gaps, and extreme Sahel heat.

Oualata

Oualata, also spelled Walata (Arabic ولاته), is a historic fortified town in southeastern Mauritania that served for centuries as the western terminus of the Saharan trade route from Timbuktu.

Oualidia Surfcamp

Oualidia Surfcamp is a surf camp and school in Oualidia, Casablanca-Settat, Morocco, run by certified instructor Zakaria Germouni, offering surf, kitesurf, and paddleboard lessons, packages from $299, and lagoon-side lodging.

Ouargla

Ouargla (Arabic ورقلة) is an oasis city and provincial capital in the Algerian Sahara, near the Hassi Messaoud oil fields, with a 6,000 ha palm grove, a historic walled ksar, and a university founded in 1988.

Ouargla Province

Ouargla Province is an Algerian wilaya, number 30, in the northeastern Algerian Sahara with its capital at Ouargla; one of Algeria's largest provinces, it depends almost entirely on groundwater.

Oct 20, 2026

Ouarville

Ouarville is a commune in the canton of Voves, Eure et Loir, France, with 548 inhabitants. Located in the Beauce plain southeast of Chartres, it has a rich recorded history.

Ouarzazate

Ouarzazate (Warzazat, Tamghazt), Morocco's 'door of the desert', a Drâa-Tafilalet provincial capital near Marrakech known for the Kasbah of Taourirt, Atlas Studios film hub, and the 582 MW Noor solar complex.

Sep 19, 2026

Ouazebas

Ouazebas, also known as Wazebas, was a king of Aksum in the late 4th century AD, known from his gilt bronze coins bearing the Greek legend "King Ouazebas".

Oubei Shihua

Oubei Shihua (瓯北诗话) is a work of poetry criticism by the Qing historian and poet Zhao Yi, published in 1802, with each chapter examining one poet in depth.

Sep 24, 2026

Ōuchi clan

The Ōuchi clan (大内氏) was a powerful medieval warrior house of western Japan based at Yamaguchi, ruling Suō and Nagato and dominating licensed trade with Ming China until its destruction in 1557.

Sep 24, 2026

Ōuchi Yoshihiro

Ōuchi Yoshihiro (大内義弘) was a Japanese warrior and provincial governor who held six western provinces before rebelling against the shogun and dying at Sakai in 1399.

Ōuchi Yoshitaka

Ōuchi Yoshitaka (大内義隆) was the 31st head of the Ōuchi clan, a shugo daimyo who dominated western Japan from Yamaguchi until his forced suicide in 1551.

Oud

The oud (Arabic: al-ʿūd) is a fretless, pear-shaped short-necked lute, the principal traditional instrument of Arabic cultures; its fretless neck allows the microtones of the maqam system, and in Iran it is known as the barbat.