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HD 32518
HD 32518 (HR 1636) is a solitary star in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 6.42, placing it near the max naked eye visibility. Located about 400 light years away, it is receding with a heliocentric radial velocity of . HD 32518 has a stellar classification of K1 III, indicating that it is an orange giant star. Located in the cool end in the red clump, the object is currently on the horizontal branch. At present it has 1.2 the mass of the Sun but has expanded to a radius of . It shines at 46.4 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,731 K, giving it an yellowish orange glow. HD 32518 is older than the Sun with an age of 6.4 billion years and spins slowly with a projected rotational velocity of 1.2 km/s−1. However, this amount is poorly constrained. As for its metallicity, studies place it around solar level. Planetary System In August 2009, a group of astrome ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Billion Years
A billion years or giga-annum (109 years) is a unit of time on the petasecond scale, more precisely equal to seconds (or simply 1,000,000,000 years). It is sometimes abbreviated Gy, Ga ("giga-annum"), Byr and variants. The abbreviations Gya or bya are for "billion years ago", i.e. billion years before present. The terms are used in geology, paleontology, geophysics, astronomy, and physical cosmology. The prefix giga- is preferred to billion- to avoid confusion in the long and short scales over the meaning of billion; the postfix annum may be further qualified for precision as a sidereal year or Julian year: :1 Gaj = s, :1 Gas = s (epoch J2000.0). :1 Gas = y Byr was formerly used in English-language geology and astronomy as a unit of one billion years. Subsequently, the term gigaannum (Ga) has increased in usage, with Gy or Gyr still sometimes used in English-language works (at the risk of confusion with Gy as abbreviation for the gray, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
11 Ursae Minoris
11 Ursae Minoris is a single star located approximately 410 light years away in the northern circumpolar constellation of Ursa Minor. The star is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 5.15. It is moving closer to the Earth with a heliocentric radial velocity of −17.5 km/s. This is an aging K-type giant star with a stellar classification of K4 III. It is 1.2 billion years old with twice the mass of the Sun. As a consequence of exhausting the hydrogen at its core, the star has expanded to 28 times the Sun's radius. It is radiating 258 times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,358 K. 11 Ursae Minoris is sometimes named ''Pherkard'' or ''Pherkad Minor'', the later name to distinguish it from ''Pherkad'' (Major) which is γ Ursae minoris. It has also been designated as γ1 Ursae minoris, in which case the brighter Pherkad is called γ2 Urs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HD 32518 B
HD 32518 b, formally named Neri, is an extrasolar planet which orbits the K-type giant star HD 32518, located 399.7 light years away in the constellation Camelopardalis. It has a minimum mass three times greater than Jupiter and orbits the intermediate-mass giant star at a distance of only 0.59 AU in a very circular orbit. The orbit takes 10.35 months to complete one round trip around the star. This planet was detected by the radial velocity method on August 12, 2009. For the 100th anniversary of the IAU HD 32518 and the planet HD 32518b were selected NameExoWorlds campaigns for Germany. The approved name of the planet HD 32518 b is Neri, named after the river Neri in Ethiopia, which runs through parts of the Mago National park Mago may refer to: Places *Mago Island, an island in Fiji * Mago, Minorca, a Carthaginian and later Roman town in Menorca * Mago, Russia, a rural locality (a settlement) in Khabarovsk Krai, Russia *Mago National Park, in Ethiopia ** Mount Mago a m . ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neckargemünd
Neckargemünd ( pfl, Neggergmin) is a town in Germany, in the district of Rhein-Neckar-Kreis, state of Baden-Württemberg. It lies on the Neckar, 10 km upriver from Heidelberg at the confluence with the river Elsenz. This confluence of the two rivers is the origin of the name, as Neckargemünd means ''confluence of the Neckar''. As of 2006, there were 14,122 inhabitants. History The region has been occupied by people for a half a million years as shown by the find of Homo heidelbergensis in nearby Mauer in 1907. Stone shards and stone axes have been found from the Early Stone Age. During Roman times the area was settled by Celts and Suebi. Grave stones from the 2nd and 3rd century in Kleingemünd show Celtic names. From the end of the 5th century the Franks held sway over the region. An iron spear tip and two iron arrow heads were left behind in Neckargemünd. Neckargemünd was founded in the 10th century, most likely as a fishing village. Neckargemünd was first mentioned ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Giraffe
The giraffe is a large African hoofed mammal belonging to the genus ''Giraffa''. It is the tallest living terrestrial animal and the largest ruminant on Earth. Traditionally, giraffes were thought to be one species, ''Giraffa camelopardalis'', with nine subspecies. Most recently, researchers proposed dividing them into up to eight extant species due to new research into their mitochondrial and nuclear DNA, as well as morphological measurements. Seven other extinct species of ''Giraffa'' are known from the fossil record. The giraffe's chief distinguishing characteristics are its extremely long neck and legs, its horn-like ossicones, and its spotted coat patterns. It is classified under the family Giraffidae, along with its closest extant relative, the okapi. Its scattered range extends from Chad in the north to South Africa in the south, and from Niger in the west to Somalia in the east. Giraffes usually inhabit savannahs and woodlands. Their food source is leaves, frui ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ethiopia
Ethiopia, , om, Itiyoophiyaa, so, Itoobiya, ti, ኢትዮጵያ, Ítiyop'iya, aa, Itiyoppiya officially the Federal Democratic Republic of Ethiopia, is a landlocked country in the Horn of Africa. It shares borders with Eritrea to the north, Djibouti to the northeast, Somalia to the east and northeast, Kenya to the south, South Sudan to the west, and Sudan to the northwest. Ethiopia has a total area of . As of 2022, it is home to around 113.5 million inhabitants, making it the 13th-most populous country in the world and the 2nd-most populous in Africa after Nigeria. The national capital and largest city, Addis Ababa, lies several kilometres west of the East African Rift that splits the country into the African and Somali tectonic plates. Anatomically modern humans emerged from modern-day Ethiopia and set out to the Near East and elsewhere in the Middle Paleolithic period. Southwestern Ethiopia has been proposed as a possible homeland of the Afroasiatic langua ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mago National Park
Mago may refer to: Places *Mago Island, an island in Fiji * Mago, Minorca, a Carthaginian and later Roman town in Menorca * Mago, Russia, a rural locality (a settlement) in Khabarovsk Krai, Russia *Mago National Park, in Ethiopia ** Mount Mago a mountain in Mago National Park, Ethiopia **Mago River a tributary of the Omo river in Mago National Park, Ethiopia People * Mago (agricultural writer), Carthaginian writer quoted and drawn on by Columella * Mago Barca (243–203 BCE), Carthaginian general, son of Hamilcar Barca and brother of Hannibal * Mago (fleet commander) (died 383 BCE), Carthaginian fleet commander, active in Sicily * Mago (general), Carthaginian general active in Sicily in the mid 4th century BCE * The Magonids of the ruling dynasty of Carthage from 550 BCE to 340 BCE ** Mago I of Carthage (reigned c. 550 – c. 530 BCE) ** Mago II of Carthage (reigned 396–375 BCE) ** Mago III of Carthage (reigned 375–344 BCE) * Andrea Bargnani known as "Il Mago" (b. 1985), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Germany
Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated between the Baltic and North seas to the north, and the Alps to the south; it covers an area of , with a population of almost 84 million within its 16 constituent states. Germany borders Denmark to the north, Poland and the Czech Republic to the east, Austria and Switzerland to the south, and France, Luxembourg, Belgium, and the Netherlands to the west. The nation's capital and most populous city is Berlin and its financial centre is Frankfurt; the largest urban area is the Ruhr. Various Germanic tribes have inhabited the northern parts of modern Germany since classical antiquity. A region named Germania was documented before AD 100. In 962, the Kingdom of Germany formed the bulk of the Holy Roman Empire. During the 16th ce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NameExoWorlds
NameExoWorlds (also known as IAU NameExoWorlds) is the name of various projects managed by the International Astronomical Union (I.A.U.) to encourage names to be submitted for astronomical objects, which would later be considered for official adoption by the organization. History The first such project (NameExoWorlds I), in 2015, regarded the naming of stars and exoplanets. 573,242 votes were submitted by members by the time the contest closed on October 31, 2015, and the names of 31 exoplanets and 14 stars were selected from these. Many of the names chosen were based on world history, mythology and literature. In June 2019, another such project (NameExoWorlds II), in celebration of the organization's hundredth anniversary, in a project officially called IAU100 NameExoWorlds, welcomed countries of the world to submit names for exoplanets and their host stars. A star with an exoplanet was assigned to each country, and members of the public submitted names for them. In August 2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Astronomical Union
The International Astronomical Union (IAU; french: link=yes, Union astronomique internationale, UAI) is a nongovernmental organisation with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreach, education, and development through global cooperation. It was founded in 1919 and is based in Paris, France. The IAU is composed of individual members, who include both professional astronomers and junior scientists, and national members, such as professional associations, national societies, or academic institutions. Individual members are organised into divisions, committees, and working groups centered on particular subdisciplines, subjects, or initiatives. As of 2018, the Union had over 13,700 individual members, spanning 90 countries, and 82 national members. Among the key activities of the IAU is serving as a forum for scientific conferences. It sponsors nine annual symposia and holds a triannual General Assembly that sets policy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doppler Spectroscopy
Doppler spectroscopy (also known as the radial-velocity method, or colloquially, the wobble method) is an indirect method for finding extrasolar planets and brown dwarfs from radial-velocity measurements via observation of Doppler shifts in the spectrum of the planet's parent star. 1,018 extrasolar planets (about 19.5% of the total) have been discovered using Doppler spectroscopy, as of November 2022. History Otto Struve proposed in 1952 the use of powerful spectrographs to detect distant planets. He described how a very large planet, as large as Jupiter, for example, would cause its parent star to wobble slightly as the two objects orbit around their center of mass. He predicted that the small Doppler shifts to the light emitted by the star, caused by its continuously varying radial velocity, would be detectable by the most sensitive spectrographs as tiny redshifts and blueshifts in the star's emission. However, the technology of the time produced radial-velocity meas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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