An open cluster is a type of star cluster made of tens to a few thousand stars that were formed from the same giant molecular cloud and have roughly the same age. More than 1,100 open clusters have been discovered within the Milky Way galaxy, and many more are thought to exist. They are loosely bound by mutual gravitational attraction and become disrupted by close encounters with other clusters and clouds of gas as they orbit the Galactic Center. This can result in a loss of cluster members through internal close encounters and a dispersion into the main body of the galaxy. Open clusters generally survive for a few hundred million years, with the most massive ones surviving for a few billion years. In contrast, the more massive globular clusters of stars exert a stronger gravitational attraction on their members, and can survive for longer. Open clusters have been found only in spiral and irregular galaxies, in which active star formation is occurring.
Scorpius is a zodiac constellation located in the Southern celestial hemisphere, where it sits near the center of the Milky Way, between Libra to the west and Sagittarius to the east. Scorpius is an ancient constellation that pre-dates the Greeks; it is one of the 48 constellations identified by the Greek astronomer Ptolemy in the second century. Its old astronomical symbol is (♏︎).
Virgo is one of the constellations of the zodiac. Its name is Latin for maiden, and its old astronomical symbol is . Between Leo to the west and Libra to the east, it is the second-largest constellation in the sky and the largest constellation in the zodiac. The ecliptic intersects the celestial equator within this constellation and Pisces. Underlying these technical two definitions, the sun passes directly overhead of the equator, within this constellation, at the September equinox. Virgo can be easily found through its brightest star, Spica.
A galaxy cluster, or a cluster of galaxies, is a structure that consists of anywhere from hundreds to thousands of galaxies that are bound together by gravity, with typical masses ranging from 1014 to 1015 solar masses. They are the second-largest known gravitationally bound structures in the universe after galaxy filaments and were believed to be the largest known structures in the universe until the 1980s, when superclusters were discovered. One of the key features of clusters is the intracluster medium (ICM). The ICM consists of heated gas between the galaxies and has a peak temperature between 2–15 keV that is dependent on the total mass of the cluster. Galaxy clusters should not be confused with galactic clusters (also known as open clusters), which are star clusters within galaxies, or with globular clusters, which typically orbit galaxies. Small aggregates of galaxies are referred to as galaxy groups rather than clusters of galaxies. The galaxy groups and clusters can themselves cluster together to form superclusters.
A stratovolcano, also known as a composite volcano, is a conical volcano built up by many layers (strata) of hardened lava and tephra. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile with a summit crater and periodic intervals of explosive eruptions and effusive eruptions, although some have collapsed summit craters called calderas. The lava flowing from stratovolcanoes typically cools and hardens before spreading far, due to high viscosity. The magma forming this lava is often felsic, having high to intermediate levels of silica, with lesser amounts of less viscous mafic magma. Extensive felsic lava flows are uncommon, but have travelled as far as 15 km (9 mi).
The Rosette Nebula is an H II region located near one end of a giant molecular cloud in the Monoceros region of the Milky Way Galaxy. The open cluster NGC 2244 is closely associated with the nebulosity, the stars of the cluster having been formed from the nebula's matter.
Folliculitis is the infection and inflammation of one or more hair follicles. The condition may occur anywhere on hair-covered skin. The rash may appear as pimples that come to white tips on the face, chest, back, arms, legs, buttocks, or head.
Flushing is to become markedly red in the face and often other areas of the skin, from various physiological conditions. Flushing is generally distinguished from blushing, since blushing is psychosomatic, milder, generally restricted to the face, cheeks or ears, and generally assumed to reflect emotional stress, such as embarrassment, anger, or romantic stimulation. Flushing is also a cardinal symptom of carcinoid syndrome—the syndrome that results from hormones being secreted into systemic circulation.
Ardabil province is one of the 31 provinces of Iran. It is in the northwest of the country, in Region 3, bordering the Republic of Azerbaijan, and the provinces of East Azerbaijan, Zanjan, and Gilan. Its administrative centre is the city of Ardabil. The province was established in 1993 from the eastern part of East Azerbaijan.
Yongding is a district under the jurisdiction of Longyan prefecture-level city in the southwest of Fujian Province, People's Republic of China. The district is a center for Hakka culture, including the traditional Hakka tulou, and a local dialect of the Hakka Chinese called the Yongding Dialect. As of 2015, Yongding has a permanent population of about 361,000, of which more than 99% are Hakka, the rest being She people. In December 2014, the Fujian government signed legislation converting Yongding from a county to a district.
Sium sisarum, commonly known as skirret, is a perennial plant of the family Apiaceae sometimes grown as a root vegetable. The English name skirret is derived from the Middle English 'skirwhit' or 'skirwort', meaning 'white root'. In Scotland it is known as crummock and in Irish cearrachán. Its Danish name sukkerrod, Dutch name suikerwortel and German name "Zuckerwurzel" translate as 'sugar root'.
A deep-sky object (DSO) is any astronomical object that is not an individual star or Solar System object. The classification is used for the most part by amateur astronomers to denote visually observed faint naked eye and telescopic objects such as star clusters, nebulae and galaxies. This distinction is practical and technical, implying a variety of instruments and techniques appropriate to observation, and does not distinguish the nature of the object itself.
The Wild Duck Cluster is an open cluster of stars in the constellation Scutum. It was discovered by Gottfried Kirch in 1681. Charles Messier included it in his catalogue of diffuse objects in 1764. Its popular name derives from the brighter stars forming a triangle which could resemble a flying flock of ducks. The cluster is located just to the east of the Scutum Star Cloud midpoint.
The Dodger Dog is a hot dog named after the Major League Baseball franchise that sells them. It is a 10-inch pork wiener wrapped in a steamed bun. The hot dog is sold at Dodger Stadium located in Los Angeles, California. According to the National Hot Dog and Sausage Council, the projected number of 2011 season hot dogs sold at Dodger Stadium was 2 million—establishing Dodger Dogs as the leader in hot dog sales of all those sold in Major League Baseball ballparks.
Yichun (Chinese: 宜春; pinyin: Yíchūn; Wade–Giles: I2-ch'un1; postal: Ichun) is a mountainous prefecture-level city in the western/northwestern Jiangxi Province, China, bordering Hunan province to the west. It is located in the northwest of the province along a river surrounded by mountains. Yichun literally means "pleasant spring". Yichun has a profound Buddhist culture. "Can Lin Qing Gui", the monastic rules for Buddhists at the Buddhist temple, originated from Yichun. Yichun is also the birthplace of a number of literary figures, such as Tao Yuanming and Deng Gu, both of whom are famous poets in China history.
NGC 6231 is an open cluster in the southern sky located half a degrees north of Zeta Scorpii. NGC 6231 is part of a swath of young, bluish stars in the constellation Scorpius known as the Scorpius OB1 association. The star Zeta1 is a member of this association, while its brighter apparent partner, Zeta2, is only 150 ly from Earth and so is not a member.
Skookumchuck Hot Springs is a thermal spring in British Columbia. Its pre-colonial Native and preferred name is Tsek Hot Spring or T'sek Hot Spring. The former name is Saint Agnes Well. The springs are located near the First Nation community of Skookumchuck and more recently renamed /reverted to traditional name of Skatin ("ska-TEEN") is on the historic Harrison Lillooet Gold Rush trail in the Lillooet River valley, south of Lillooet Lake, in British Columbia, Canada.
Yangxi County is a coastal county in the southwest of Guangdong Province, China, facing the South China Sea to the south. It is under the administration of the prefecture-level city of Yangjiang. The county has a total area of 1,271 km2 (491 sq mi), and 126.6 km (78.7 mi) of coastline.
Radkan is a city in, and the capital of, Radkan District of Chenaran County, Razavi Khorasan province, Iran.
