Encyclopedia

Helene Stöcker Helene Stöcker (born 13 November 1869 in Wuppertal; died 24 February 1943 in New York) was a German feminist, pacifist and publicist. In 1903, she founded the "Bund für Mutterschutz und Sexualreform" for protection of unmarried mothers and their children.
Helengrad Helengrad is a satirical or pejorative neologism in New Zealand politics applied to New Zealand's capital city Wellington. However, it is sometimes used by Labour's opponents and critics to describe New Zealand as a whole and occasionally the fifth Labour government itself.
Helenio Herrera Helenio Herrera (born April 17 1910 in Buenos Aires; died November 9, 1997 in Venice) was a French-Argentine football player and manager. Herrera had a relatively modest career as a player but, with 16 major titles, he became not only one of the most successful, but also one of the most influential managers in the history of the game.
HelenOS The HelenOS project aims to develop a general-purpose and portable operating system with elements of microkernel design and fully preemptive kernel. It currently runs on X86 64, IA32, IA64, MIPS, PowerPC (32-bit only) and sparc64 architectures.
Helensburgh Central railway station Helensburgh Central railway station serves the town of Helensburgh on north shore of the Firth of Clyde, near to Glasgow. The station is a terminus on the North Clyde Line 38 km (24 miles) north west of Glasgow Queen Street railway station.
Helenswood School The Helenswood Girls School, is a secondary school in Hastings, East Sussex in the United Kingdom, and has achieved specialist Arts College status. It takes girls from age 11 to age 16, and there is a separate Sixth form which is shared with William Parker School, a local boys' school.
Heleomyzidae Heleomyzidae is a small family of true flies in the insect order Diptera. There are over 500 described species of Heleomyzidae in about 65 genera and 22 tribes distributed throughout the world; the greatest number occur in the Holarctic Region.
Helf Alliance The Helf Alliance or Tripartite Alliance (Arabic: الحلف الثلاثي), is a right-wing coalition formed in 1968 by the big three mainly Christian parties in Lebanon: The Pierre Gemayel's Kataeb, the National Liberal Party of former President Camille Chamoun, and National Bloc of Raymond Eddé. The coalition called for a Lebanese Nationalism as Regional and internal tensions rise, and as relations with PLO spoils.
Helfaer Field Helfaer Field, in Milwaukee, Wisconsin, is a Little League baseball field that is located directly next to Miller Park, home of the Milwaukee Brewers. Home plate at Helfaer Field lies where the former Milwaukee County Stadium home plate was.
Helfer (rank) Helfer is a German word which translates as "Helper", and the word was used as a paramilitary rank of the Nazi Party between the years of 1938 and 1945. The Nazi rank of Helfer was a junior position of the Political Leadership Corps, ranking only above Anwärter.
Helford Passage Helford Passage is a small village in Cornwall, England, UK,close to the mouth of the picturesque, heavily wooded Helford Estuary. There is a pub and holiday cottages, with the gardens at Trebah, and the National Trust's Glendurgan Garden, a short walk away.
Helford River Helford River is not a river or an estuary but a ria located in Cornwall which passes the Trebah and Glendurgan gardens, and the Durgan village. At the Head of the Helford River is Gweek, containing a boat building and repair centre, and the Gweek seal sanctuary, where injured Atlantic grey seals are nursed back to health before being released to the freedom of the Atlantic Ocean.
Helga Helga (derived from Old Norse heilagr - "holy", "blessed") is a female name, used mainly in Russia (Olya, Olenka, or Olechka), Ukraine (Ольга), Scandinavia (Hege, Helle, Helge, Helga, Helka or Oili), Bulgaria, Serbia (Олга), Germany (Helga or Hella), Croatia, Poland (Olga), Hungary (Olga or Helga) Romania and Slovenia. The name was in use in England before the Norman Conquest, but appears to have died out afterwards.
Helga Deen Helga Deen (Stettin, April 6 1925 – Sobibor, July 16 1943) was the author of a diary, discovered in 2004, which describes her stay in a Dutch prison camp, Kamp Vught, during World War II at the age of eighteen. After her last diary entry, in early July 1943, she was deported to Sobibór extermination camp and murdered.
Helga Estby Helga Estby and her 19-year-old daughter, Clara, were Norwegian immigrants who tried to save their family farm in eastern Washington state in 1896 by walking 3,500 miles across North America in an effort to win a $10,000 prize. On Christmas Eve, 1896, the New York World reported their arrival in New York City.
Helga Nowotny Helga Nowotny (born 9 August 1937) is Vice President of ERC Scientific Council and has been Professor for Social Studies of Science at ETH Zurich since 1996. From 1998 on she was also Director of the Collegium Helveticum.
Helga Zepp-LaRouche Helga Zepp-LaRouche (born August 25, 1948, Trier) is a German political activist, wife of controversial American political activist, Lyndon LaRouche, and founder of the LaRouche movement's Schiller Institute and the German Bürgerrechtsbewegung Solidarität party (BüSo) (Civil Rights Movement Solidarity).
Helgakviða Hjörvarðssonar Helgakviða Hjörvarðssonar (Lay of Helgi Hjörvarðsson) is an Eddic poem, found in the Codex Regius manuscript where it follows Helgakviða Hundingsbana I and precedes Helgakviða Hundingsbana II. The portion of text which constitutes the poem is unnamed in the manuscript and may never have been intended to be viewed as a single poem, though scholars have assigned it a name for convenience.
Helgøy Helgøy is an island in Troms in Norway, and the former seat of an independent municipality in the western part of present Karlsøy. Helgøy today a more or less abandoned village of picturesque wooden houses and an old church.
Helge Boes Helge Boes, an operations officer with the Central Intelligence Agency, was killed on February 5, 2003, while participating in United States counterterrorism efforts in eastern Afghanistan. Boes was taking part in a live-fire exercise when a grenade detonated prematurely, killing him and wounding two others.
Helge Brendryen Helge Brendryen (born February 17 1972) is a former Norwegian ski jumper who competed from 1993 to 1995. He won a gold medal in the team large hill at the 1993 FIS Nordic World Ski Championships and finished fifth in the individual large hill at those same championships.
Helge Bronée Helge Christian Bronée (28 March 1922, Nybølle — 3 June 1999, Dronningmølle) was a Danish footballer. He played four games as a winger for the amateur Denmark national football team, before moving abroad to play professionally.
Helge Ingstad Helge Marcus Ingstad (30 December 1899 – 29 March 2001) was a Norwegian explorer. After mapping some Norse settlements, Ingstad and his wife Anne Stine, an archaeologist, in 1961 found remnants of a Viking settlement in L'Anse aux Meadows on Newfoundland.
Helge Krabye Helge Krabye (born 1953 in Oslo) is a Norwegian composer, sound designer and video editor, and he has composed music for more than eighty television documentaries (many of these produced by NRK "Brennpunkt"), radio plays, fantasy stories and art projects as well as more than a hundred signature melodies and musical jingles.
Helge Skoog Helge Skoog, born 6th August 1938 in Borås, Västra Götalands län (Västergötland) is a Swedish actor, who became well known during the 1980s appearing on the TV series Teatersport. During the 2000s he took part in the TV program Parlamentet.
Helge Thiis Helge Thiis was a Norwegian architect who lived from 1897 to 1972. He was also an art critic in Nationen, Oslo from 1924 to 1929 and leader of Nidaros domkirkes restaureringsarbeider (Nidaros Cathedral's Restoration Works) from 1930 to 1972.
Helge von Koch Niels Fabian Helge von Koch (January 25, 1870 - March 11, 1924) was a Swedish mathematician, who gave his name to the famous fractal known as the Koch snowflake, which was one of the earliest fractal curves to have been described.
Helgeandsholmen Helgeandsholmen is a small island in central of Stockholm, Sweden. It is located north of Stadsholmen, and east of Strömsborg, with which, together with Riddarholmen, it forms Gamla stan, the old town of Stockholm.
Helgelandsmoen Helgelandsmoen is a village and site of an abandoned military camp in the municipality of Hole, Norway. Its population (2005) is 325, of which 53 people live within the border of the neighboring municipality Ringerike .
Helgeseter Abbey Helgeseter Abbey was an Augustinian abbey in what is now Elgeseter in Trondheim, Norway across the river Nidelven from Trondheim Cathedral. The abbey was founded by Archbishop Eistein in 1183 and closed during the reformation in 1537, and in 1564 the building burnt down.
Helghast (Killzone) The Helghast are the main enemy in the game Killzone. A humanoid race with a passion for vengeance and hardship, they are led by Scolar Visari and General Lente and have a striking appearance, based on a Fascist-like army.
Helgi Ă“lafsson Helgi Ă“lafsson (born August 15, 1956, Vestmannaeyjar, Iceland) is a chess grandmaster, one of a group of young Icelandic grandmasters that emerged after the World Chess Championship 1972 between Bobby Fischer and Boris Spassky, dubbed the Match of the Century, was held in ReykjavĂ­k. Helgi Ă“lafsson became grandmaster in 1985 and has won the Icelandic Chess Championship six times.
Helgi Hundingsbane Helgi Hundingsbane was a hero in the Norse sagas, who appears in the Volsunga saga and in two lays in the Poetic Edda named Helgakviða Hundingsbana I and II. The Poetic Edda relates that Helgi and his mistress Sigrún were Helgi Hjörvarðsson and Sváva of the Helgakviða Hjörvarðssonar reborn.
Helgo Zettervall Helgo Zettervall, older spelling Zetterwall, (November 21, 1831 – 1907) was a Swedish architect and professor of the Royal Swedish Academy of Arts. He is best known for his drastic restorations of churches and other buildings around Sweden.
Helgoland (Bruckner) Helgoland is a piece by Anton Bruckner for full orchestra and male choir with a duration from twelve to thirteen minutes. It was composed in 1893 for the Men's Choir of Vienna to celebrate its fiftieth birthday, and thus constitutes, if one takes account of the incompletion of the Ninth symphony, the last complete work of Bruckner.
Helgoland Island Air Disaster The Helgoland Island Air Disaster occurred on September 9, 1913 and is traditionally considered the first air disaster involving more than ten (10) fatalities. A German Navy Zeppelin L-1 airship with 20 passengers and crew on board flew into a thunderstorm and encountered a severe downdraft, crashing 20 miles north of Heligoland Island into the North Sea.
Heli Attack (series) The Heli Attack series is a series of run-and-gun shooter games created by the company squarecircleco. in which the player takes on the role of a soldier (later a paratrooper) who must use a number of weapons to destroy helicopters, or helis, whilst these enemies simultaneously attempt to kill the player.
Heli Attack 2 Heli Attack 2 is an Internet game created by Squarecircleco. Players take the role of a soldier in a jungle-type environment, and must take down as many helicopters, or "helis", as possible before the player dies, using a wide array of weapons.
Heliacal rising The heliacal rising of a star (or other body such as the moon or a planet) occurs when it first becomes visible above the eastern horizon at dawn, after a period when it was hidden below the horizon or when it was just above the horizon but hidden by the brightness of the sun. Each day after the heliacal rising, the star will appear to rise slightly earlier and remain in the sky longer before it is hidden by the sun (the sun appears to drift eastward relative to the stars along a path called the ecliptic).
Heliaia Heliaia (Greek: Ἡλιαία) or Halia (Greek: ἁλία) was the supreme court of ancient Athens. Τhe generally held scientific view is that the court drew its name from the ancient Greek verb , which means συναθροίζεσθαι, namely congregate.
Heliamphora The genus Heliamphora (Greek: helos = marsh, amphoreus = amphora) contains 16 species of pitcher plants native to South America. The species are collectively known as sun pitchers, based on the mistaken notion that the heli of Heliamphora is from the Greek helios, meaning "sun".
Heliamphora heterodoxa Heliamphora heterodoxa (Greek: heteros = other, doxa = opinion, belief) is a species of Marsh Pitcher Plant native to Gran Sabana and the plateau of the Ptari-Tepui in Venezuela. It was first discovered in 1951 upon Mt.
Helian Bobo Helian Bobo (赫連勃勃) (381-425), né Liu Bobo (劉勃勃), courtesy name Qujie (屈孑), formally Emperor Wulie of Xia (夏武烈帝), was the founding emperor of the Chinese/Xiongnu state Xia. He is generally considered to be an extremely cruel ruler, one who betrayed every benefactor that he had, and whose thirst for killing was excessive even for the turbulent times that he was in.
Helianthella castanea The perennial herb Helianthella castanea is a rare plant endemic to California, and is only found in the San Francisco Bay Area, mostly in and around Mount Diablo State Park. Its common names include Mount Diablo helianthella, Mount Diablo sunflower, and Diablo rockrose.
Helianthemum Helianthemum (rockrose, sunroses, rushrose, or helianthemum) is a genus of about 110 species of evergreen or semi-evergreen subshrubs. They are widely distributed in the Americas, Europe, and from North Africa to Asia Minor and Central Asia, with the centre of diversity in the Mediterranean region.
Helianthos Helianthos is a program focused on the development of solar cell modules that can be manufactured via roll-to-roll processes on long foil substrates. Helianthos is being carried out by a core group of industrial partners and is supported by universities, technology institutes, and other partners.
Helibase The Incident Helibase is the location where the helicopters are parked, serviced, and refueled. Often, this temporary facility is located at a nearby airport, a helibase can be made out in a field near the incident.
Helical cone beam computed tomography Helical (or spiral) cone beam computed tomography is a type of three dimensional computed tomography (CT) in which the source (usually of x-rays) describes a helical trajectory relative to the object while a two dimensional array of detectors measures the transmitted radiation on part of a cone of rays eminating from the source. Willi Kalender, who is credited with the invention prefers the term Spiral scan CT, arguing that spiral is synonymous with helical: for example as used in 'spiral staircase'.
Helical railgun Helical railguns are multi-turn railguns that reduce rail and brush current by a factor equal to the number of turns. Two rails are surrounded by a helical barrel and the projectile or re-useable carrier is also helical.
Helical wheel A helical wheel is a type of plot or visual representation used to illustrate the properties of alpha helices in proteins. The sequence of amino acids that make up a helical region of the protein's secondary structure are plotted in a rotating manner where the angle of rotation between consecutive amino acids is 100°, so that the final representation looks down the helical axis.
Helicarrier The Helicarrier, an aircraft carrier specifically designed to be itself capable of independent powered flight in addition to the conventional functions of aircraft carriers, is the signature capital ship of the fictional intelligence/defence agency S.H.
Helicase Helicases are a class of enzymes vital to all living organisms. They are motor proteins that move unidirectionally along single-stranded nucleic acids using energy derived from nucleotide hydrolysis, often separating the two strands of a nucleic acid double helix in the process.
Helicene Helicenes in organic chemistry are ortho-condensed polycyclic aromatic compounds in which benzene rings or other aromatic compounds are angularly annulated so as to give helically shaped molecules. The chemistry of helicenes has attracted continuing attention because of their unique structural, spectral, and optical features Diels-Alder Additions of Benzynes within Helicene Skeletons David Zhigang Wang, Thomas J.
Helicity (fluid mechanics) In fluid mechanics, helicity is the extent to which corkscrew-like motion occurs. If a parcel of fluid is moving, undergoing solid body motion rotating about an axis parallel to the direction of motion, it will have helicity.
Helicobacter Helicobacter is a genus of Gram-negative bacteria possessing a characteristic spiral shape. Some species have been found living in the lining of the upper gastrointestinal tract, as well as the liver of mammals and some birds.
Helicoid The helicoid is one of the first minimal surfaces discovered. Its name derives from its similarity to the helix: for every point on the helicoid there is a helix contained in the helicoid which passes through that point.
Helicon (planet) In Isaac Asimov's Foundation Series, Helicon is the name of the home planet of Hari Seldon, discoverer and developer of psychohistory. Helicon was small in population and not particularly rich in resources, and tended to be bullied by its more powerful neighbours.
Helicon Filter Helicon Filter, often referred to more simply as Helicon and sometimes as Filter, is a proprietary commercial and freeware photo editing software program, similar to such programs as Adobe Photoshop and GIMP, developed and published by Helicon Soft Limited based in Kharkov, Ukraine. Helicon Filter's interface has easy-access edits and simple menu controls while still providing advanced features in labeled "filter" tabs.
Helicon Focus Helicon Focus, or more simply Focus, is a proprietary commercial digital image processing tool, first released in 2003, developed and published by Helicon Soft Limited. Like programs such as CombineZM, Helicon Focus is designed to blend the focused areas of several partially focused digital photographs in order to increase the Depth of field (DOF) possible in an image.
Helicon Photo OS Helicon Photo OS is a digital image organizational photo library software tool in early developmental stages designed by Helicon Soft Limited. Similar to such image library programs as Google's Picasa and Adobe's Photoshop Album, the program is intended to allow the user to import, organize, and find photographs with integrated tools for editing with Helicon Soft's image editor, Helicon Filter.
Helicon Records Helicon, (Hebrew: הליקון), is a record label which was founded in Israel. Aside from being the label of countless Israeli artists, Helicon also distributes many foreign artists to Israel such as Robbie Williams.
Heliconia Heliconia is a genus of about 100 to 200 species of flowering plants native to the tropical Americas and the Pacific Ocean islands west to Indonesia. It is the sole genus of family Heliconiacae, but was formerly included in the family Musaceae.
Heliconia chartacea Heliconia chartacea is a species of Heliconia native to the American tropics, mainly Guiana and Brazil. It is a common upland species of disturbed sites, young secondary forest, and abandoned cultivation, and is often found near human habitation.
Heliconia tortuosa Heliconia tortuosa is an herbaceous tropical perennial commonly found in secondary succession in montane forests. It has also been widely cultivated as a garden plant for its showy, usually twisted (hence the name tortuosa) inflorescences.
Heliconius erato Heliconius erato is commonly known under a variety of names, such as the "Red Postman", the "Small Postman", the "Red Passion Flower Butterfly", or the "Crimson-Patched Longwing". It is one of about 40 different Neotropical species belonging to the genus Heliconius.
Helicoprion Helicoprion ("Spiral Saw") was an ancient genus of sharks that lived from the Carboniferous to the Triassic periods. It grew to approximately 20 ft long and had a bizarre "buzz saw" teeth structure with a longer lower jaw comprising many rows of progressively larger teeth.
Helicopter (song) "Helicopter" is a song by British indie rock band Bloc Party. It was first released as a single from their 2004 EP Little Thoughts on October 25, 2004 in the Europe and released again on February 21, 2006 in the US.
Helicopter Aircrew Breathing Device The Helicopter Aircrew Breathing Device or HABD is a piece of military survival gear which was adpoted in order to increase the chances of survival for embarked troops and aircrew trapped in an aircraft which has ditched (crashed into a body of water.) Similar in function to SCUBA gear, it consists of a small cylinder pressurized with atmospheric air and first stage regulator worn in a pouch on the user's flotation vest; a pressure gauge; an air hose and a special second-stage regulator (the part that delivers air via the user's mouth).
Helicopter drop point A Helicopter drop point, or drop point is similar to a helispot, but used for ground supplies. Large supply vehicles can drive up to a drop point and literally drop supplies off on the edge of an incident for the ground teams to come by and pick up.
Helicopter noise reduction Helicopter noise reduction is a topic of research into designing helicopters which can be operated more quietly, reducing the public-relations problems with night-flying or expanding an airport. In addition, it is useful for military applications in which stealth is required: long-range propagation of helicopter noise can alert an enemy to an incoming helicopter in time to re-orient defenses.
Helicopter parent A helicopter parent is a term for a person who pays extremely close attention to his or her child or children, particularly at educational institutions. They rush to prevent any harm from befalling them or letting them learn from their own mistakes, sometimes even contrary to the children's wishes.
Helicopter support team The Helicopter Support Team (HST) is a unit of organization within the United States Marine Corps that manages the activities of a helicopter landing zone (LZ). It consists of a team of eight Landing Support Marines who are trained to hook up external loads to the hooks of primarily military helicopters.
Helicopter Shark [Shark]Helicopter Shark is a composition of two photographs that gives the impression that a Great White shark is leaping out of the water attacking either a special forces UH-60 Blackhawk helicopter or the military personnel that is climbing a suspended ladder attached to the helicopter. The photo was widely ciculated via an email in 2001.
Helicopters (band) Helicopters were an Australian new wave, ska-influenced pop band who formed in Perth, Western Australia in 1980. They released two albums, a self titled album and a career retrospective, Great Moments In Aviation.
Helicoverpa armigera The Cotton Bollworm, Corn Earworm, Tobacco Budworm or Old World Bollworm (Helicoverpa armigera, also known as the Scarce Bordered Straw in the UK, where it is an immigrant) is a moth whose larvae are known to feed on a wide array of plants including a range of plants cultivated by humans. They are among the most polyphagous and cosmopolitan pests.
Helictite A helictite is a speleothem found in limestone caves that changes its axis from the vertical at one or more stages during its growth. They have a curving or angular form that looks as if they were grown in zero gravity.
Helidon, Queensland Helidon is a town in the Lockyer Valley region of south east Queensland, Australia. Helidon is located on the Warrego Highway, 106 kilometres west of the state capital, Brisbane and 21 kilometres east of Toowoomba.
Helier Saint Helier, a 6th century ascetic hermit, is patron saint of Jersey in the Channel Islands, and in particular of the town and parish of Saint Helier, the island’s capital. He is also invoked as a healing saint for diseases of the skin and eyes.
Heligoland (band) Heligoland are a four-piece band from Melbourne, Australia that plays sparse, dreamy and evocative music. Heligoland's songs and sound have been compared to the atmospheric textures and soaring female vocals of the Cocteau Twins, the spartan soulfulness of Low and the wistful melancholy of Mojave 3.
Heligoland Bight The Heligoland Bight (also known as Helgoland Bight) is the southern part of the German Bight, itself a bay of the North Sea, located at the mouth of the Elbe river. Named after the Heligoland Island, it was the location of the Battle of Heligoland Bight.
Heligoland-Zanzibar Treaty The Heligoland-Zanzibar Treaty (German: Helgoland-Sansibar-Vertrag) was an 1890 agreement between the United Kingdom and the German Empire - hence also Anglo-German Agreement of 1890 - concerning mainly territorial interests in Africa.
Heligolandic Heligolandic (Halunder) is the dialect of the North Frisian language spoken on the North Sea island of Heligoland. It is spoken today by only a few hundred of the island's 1650 inhabitants and is also taught in schools.
Helike (mythology) In Greek mythology, Helike was one of the nymphs who nurtured Zeus in his infancy on Crete (Aratus, Phaenomena 27 and also Her name suggests that she was a "willow]-nymph", just as there were [[oak-tree nymphs and ash-nymphs (Dryads and Meliai).
Helikite A helikite is a unique combination of a helium balloon and a kite, that forms a single, aerodynamically sound tethered aircraft, that exploits both wind and helium for its lift. The balloon is generally oblate-spheroid in shape although this is not essential.
Helikon vortex separation process The Helikon vortex separation process is an aerodynamic uranium enrichment process designed around a device called a vortex tube. This method was designed and used in South Africa for producing reactor fuel with a uranium-235 content of around 3–5% in addition to making 80–93% enrichment for the weapons program.
Helikopter-Streichquartett The Helikopter-Streichquartett is one of Karlheinz Stockhausen's best-known pieces from recent years, and one of the most complex to perform. It involves a string quartet, four helicopters with pilots, as well as audio and video equipment and technicians.
Heliobacteria The heliobacteria are a small family of bacteria that produce energy through photosynthesis. The primary pigment involved is bacteriochlorophyll g, which is unique to the group and absorbs at different frequencies than other photosynthetic pigments, giving the heliobacteria their own environmental niche.
Heliodon A heliodon (HEE-leo-don) is a device for adjusting the angle between a flat surface and a beam of light to match the angle between a horizontal plane at a specific latitude and the solar beam. Heliodons are used primarily by architects and students of architecture.
Heliodor Píka Brigade general Heliodor Píka (July 3 1897 Štítina (near Opava) – June 21 1949 Prague) was a Czechoslovak army officer, who was executed by the Communist regime after a fabricated trial, mainly because of his pro-Western attitude during his appointment as the head of Czechoslovak military mission to the Soviet Union during the World War II.
Heliodorus of Emesa Heliodorus of Emesa, from Emesa, Syria, was a Greek writer generally dated in the 3rd century of the Common Era, and is known for the ancient Greek romance or novel called the Aethiopica (the Ethiopian Story) or sometimes "Theagenes and Chariclea".
Heliodorus pillar The Heliodorus pillar was erected around 110 BCE in central India in Vidisha near modern Besnagar, by Heliodorus, a Greek ambassador of the Indo-Greek king Antialcidas to the court of the Sunga king Bhagabhadra. The site is located only 5 miles from the famous Buddhist stupa of Sanchi.
Heliochrome Heliochrome, a term derived from the roots "helios" = sun and "chroma" = color, (literally sun colors), is a term referring to any color photograph. However, it is specifically used to refer to a group of old, incomplete color processes from the late 1800s and early 1900s.
Heliometer Heliometer (from Greek sun and measure) is an instrument originally designed for measuring the variation of the sun's diameter at different seasons of the year, but applied now to the modern form of the instrument which is capable of much wider use. The present article also deals with other forms of double-image micrometer.
Heliophysics Heliophysics is the study of the system composed of the Sun's heliosphere and the objects that interact with it -- most notably, but not limited to, plantary atmospheres and magnetospheres, the solar corona, and the interstellar medium. Heliophysics combines several other disciplines, including several branches of space physics, plasma physics, and solar physics.
Heliopolis (ancient) Heliopolis (Greek: or ), was one of the most ancient cities of Egypt, and capital of the 13th Lower Egyptian nome. Confusingly, its name also refers (in European languages) to an unrelated modern suburb of Cairo, properly known as مصر الجديدة, Miṣr al-ǧidīdah (literally "New Egypt").
Heliopolis (Cairo Suburb) Modern Heliopolis (also known as مصر الجديدة, Masr el-gidīdah – literally "New Egypt" ) is a district of Cairo, Egypt. The town was established by the Heliopolis Oasis Company, headed by the Belgian industrialist Édouard Louis Joseph, Baron Empain, beginning in 1905.
Helios Airways Flight 522 Helios Airways Flight 522 (HCY 522 or ZU522) was a Helios Airways Boeing 737-31S flight that crashed on August 14, 2005 at 12:04 EEST into a mountain north of Marathon and Varnavas, Greece. Rescue teams located wreckage near the community of Grammatiko 40 kilometres (25 miles) from Athens.
Helioseismography Helioseismography is the study of the properties of the sun by using (sound)waves to determine the temperature, density, composition, and motion of the interior of the sun. These sound waves, and the modes of vibration they produce, can be used to probe the interior of the sun the same way that geologists uses seismic waves from earthquakes to probe the inside of the earth.
Heliosphere The heliosphere is a bubble in space produced by the solar wind. Although electrically neutral atoms from interstellar space can penetrate this bubble, virtually all of the material in the heliosphere emanates from the Sun itself.
Heliospheric current sheet The Heliospheric current sheet (HCS) is the surface within the Solar System where the polarity of the Sun's magnetic field changes from north to south. This field extends from the Sun's equatorial plane throughout the entire Solar System out to the heliosphere.

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