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Our Mr. Sun
''Our Mr. Sun'' is a 1956 one-hour American television film in Technicolor written, produced, and directed by Frank Capra, with animation by UPA. It is a documentary that explains how the Sun works and how it also plays a huge part in human life. It was first broadcast on television by CBS in 1956. The film starred Frank Baxter as "Dr. Research", and Eddie Albert as "the fiction writer", the other recurring character in The Bell Laboratory Science Series. Marvin Miller voiced the animated sun. Sterling Holloway, who was uncredited, voiced an animated version of chlorophyll. The film is notable as the last project of actor Lionel Barrymore, who provided the voice of Father Time. The film was first broadcast on television two years after Barrymore's death in 1954. ''Our Mr. Sun'' and a companion film, '' Hemo the Magnificent'' (about blood circulation), were popular favorites for showing in primary and secondary school science classrooms from the late 1950s until the early ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Educational Film
An educational film is a film or movie whose primary purpose is to educate. Educational films have been used in classrooms as an alternative to other teaching methods. History Determining which films should count as the first educational films is controversial. Some researchers suggest that the first educational films were shown in St. Petersburg in 1897, while other studies determined that the first educational films were inspired by the newsreel in 1913. The increasing number of educational films prove that the production of such films started in the early 1900s. In the 1910s and 1920s, the production, distribution and exhibition of education film became gradually institutionalized, which happened differently in different countries. Usage of educational film Educational films are productions aiming to inform target audiences about designated issues.McClusky, F. Dean. "The nature of the educational film." Hollywood Quarterly 2.4 (1947): 371-380. The topic of study varies. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Father Time
Father Time is a personification of time, in particular the progression of history and the approach of death. In recent centuries, he is usually depicted as an elderly bearded man, sometimes with wings, dressed in a robe and carrying a scythe and an hourglass or other timekeeping device. As an image, the origins of "Father Time" are varied. The ancient Greeks themselves began to associate ''Chronos Protogenos'' with the god Cronos, who had the attribute of a harvester's sickle. The Romans equated Cronos with Saturn, who also had a sickle, and was treated as an old man, often with a crutch. The wings and hourglass were early Renaissance additions and he eventually became a companion of the Grim Reaper, personification of Death, often taking his scythe. He may have as an attribute a snake with its tail in its mouth, an ancient Egyptian symbol of eternity. New Year Around New Year's Eve, the media (in particular editorial cartoons) use the convenient trope of Father Time as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solar Corona
In astronomy, a corona (: coronas or coronae) is the outermost layer of a star's Stellar atmosphere, atmosphere. It is a hot but relatively luminosity, dim region of Plasma (physics), plasma populated by intermittent coronal structures such as solar prominence, prominences, coronal loops, and helmet streamers. The Sun's corona lies above the chromosphere and extends millions of kilometres into outer space. Coronal light is typically obscured by diffuse sky radiation and Glare (vision), glare from the solar disk, but can be easily seen by the naked eye during a total solar eclipse or with a specialized coronagraph. Spectroscopic measurements indicate strong ionization in the corona and a plasma temperature in excess of , much hotter than the surface of the Sun, known as the photosphere. is, in turn, derived . History In 1724, French-Italian astronomer Giacomo F. Maraldi recognized that the aura visible during a solar eclipse belongs to the Sun, not to the Moon. In 1809, Span ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gravity
In physics, gravity (), also known as gravitation or a gravitational interaction, is a fundamental interaction, a mutual attraction between all massive particles. On Earth, gravity takes a slightly different meaning: the observed force between objects and the Earth. This force is dominated by the combined gravitational interactions of particles but also includes effect of the Earth's rotation. Gravity gives weight to physical objects and is essential to understanding the mechanisms responsible for surface water waves and lunar tides. Gravity also has many important biological functions, helping to guide the growth of plants through the process of gravitropism and influencing the circulation of fluids in multicellular organisms. The gravitational attraction between primordial hydrogen and clumps of dark matter in the early universe caused the hydrogen gas to coalesce, eventually condensing and fusing to form stars. At larger scales this results in galaxies and clust ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helium
Helium (from ) is a chemical element; it has chemical symbol, symbol He and atomic number 2. It is a colorless, odorless, non-toxic, inert gas, inert, monatomic gas and the first in the noble gas group in the periodic table. Its boiling point is the lowest among all the Chemical element, elements, and it does not have a melting point at standard pressures. It is the second-lightest and second-most Abundance of the chemical elements, abundant element in the observable universe, after hydrogen. It is present at about 24% of the total elemental mass, which is more than 12 times the mass of all the heavier elements combined. Its abundance is similar to this in both the Sun and Jupiter, because of the very high nuclear binding energy (per nucleon) of helium-4 with respect to the next three elements after helium. This helium-4 binding energy also accounts for why it is a product of both nuclear fusion and radioactive decay. The most common isotope of helium in the universe is helium-4, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrogen
Hydrogen is a chemical element; it has chemical symbol, symbol H and atomic number 1. It is the lightest and abundance of the chemical elements, most abundant chemical element in the universe, constituting about 75% of all baryon, normal matter. Under standard conditions, hydrogen is a gas of diatomic molecules with the chemical formula, formula , called dihydrogen, or sometimes hydrogen gas, molecular hydrogen, or simply hydrogen. Dihydrogen is colorless, odorless, non-toxic, and highly combustible. Stars, including the Sun, mainly consist of hydrogen in a plasma state, while on Earth, hydrogen is found as the gas (dihydrogen) and in molecular forms, such as in water and organic compounds. The most common isotope of hydrogen (H) consists of one proton, one electron, and no neutrons. Hydrogen gas was first produced artificially in the 17th century by the reaction of acids with metals. Henry Cavendish, in 1766–1781, identified hydrogen gas as a distinct substance and discovere ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alpha Centauri
Alpha Centauri (, α Cen, or Alpha Cen) is a star system in the southern constellation of Centaurus (constellation), Centaurus. It consists of three stars: Rigil Kentaurus (), Toliman (), and Proxima Centauri (). Proxima Centauri is the List of nearest stars, closest star to the Sun at 4.2465 light-years (ly) which is 1.3020 parsecs (pc). Rigil Kentaurus and Toliman are Sun-like stars (G-type main-sequence star, class G and K-type main-sequence star, K, respectively) that together form the binary star system . To the naked eye, these two main components appear to be a single star with an apparent magnitude of −0.27. It is the brightest star in the constellation and the List of brightest stars, third-brightest in the night sky, outshone by only Sirius and Canopus. Rigil Kentaurus has 1.1 times the Solar mass, mass () and 1.5 times the Solar luminosity, luminosity of the Sun (), while Toliman is smaller and cooler, at and less than . The pair ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astrolabe
An astrolabe (; ; ) is an astronomy, astronomical list of astronomical instruments, instrument dating to ancient times. It serves as a star chart and Model#Physical model, physical model of the visible celestial sphere, half-dome of the sky. Its various functions also make it an elaborate inclinometer and an analog computer, analog calculation device capable of working out several kinds of problems in astronomy. In its simplest form it is a metal disc with a pattern of wires, cutouts, and perforations that allows a user to calculate astronomical positions precisely. It is able to measure the horizontal coordinate system, altitude above the horizon of a celestial body, day or night; it can be used to identify stars or planets, to determine local latitude given local time (and vice versa), to survey, or to triangulation, triangulate. It was used in classical antiquity, the Islamic Golden Age, the European Middle Ages and the Age of Discovery for all these purposes. The astrolabe, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Algebra
Algebra is a branch of mathematics that deals with abstract systems, known as algebraic structures, and the manipulation of expressions within those systems. It is a generalization of arithmetic that introduces variables and algebraic operations other than the standard arithmetic operations, such as addition and multiplication. Elementary algebra is the main form of algebra taught in schools. It examines mathematical statements using variables for unspecified values and seeks to determine for which values the statements are true. To do so, it uses different methods of transforming equations to isolate variables. Linear algebra is a closely related field that investigates linear equations and combinations of them called '' systems of linear equations''. It provides methods to find the values that solve all equations in the system at the same time, and to study the set of these solutions. Abstract algebra studies algebraic structures, which consist of a set of mathemati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anaxagoras
Anaxagoras (; , ''Anaxagóras'', 'lord of the assembly'; ) was a Pre-Socratic Greek philosopher. Born in Clazomenae at a time when Asia Minor was under the control of the Persian Empire, Anaxagoras came to Athens. In later life he was charged with impiety and went into exile in Lampsacus. Responding to the claims of Parmenides on the impossibility of change, Anaxagoras introduced the concept of '' Nous'' ( Cosmic Mind) as an ordering force. He also gave several novel scientific accounts of natural phenomena, including the notion of panspermia, that life exists throughout the universe and could be distributed everywhere. He deduced a correct explanation for eclipses and described the Sun as a fiery mass larger than the Peloponnese, and also attempted to explain rainbows and meteors. He also speculated that the sun might be just another star. Biography Anaxagoras was born in the town of Clazomenae in the early 5th century BC, where he may have been born into an aristoc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apollo
Apollo is one of the Twelve Olympians, Olympian deities in Ancient Greek religion, ancient Greek and Ancient Roman religion, Roman religion and Greek mythology, Greek and Roman mythology. Apollo has been recognized as a god of archery, music and dance, truth and prophecy, healing and diseases, the Sun and light, poetry, and more. One of the most important and complex of the Greek gods, he is the son of Zeus and Leto, and the twin brother of Artemis, goddess of the hunt. He is considered to be the most beautiful god and is represented as the ideal of the ''kouros'' (ephebe, or a beardless, athletic youth). Apollo is known in Greek-influenced Etruscan mythology as ''Apulu''. As the patron deity of Delphi (''Apollo Pythios''), Apollo is an oracular god—the prophetic deity of the Pythia, Delphic Oracle and also the deity of ritual purification. His oracles were often consulted for guidance in various matters. He was in general seen as the god who affords help and wards off e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mithra
Mithra ( ; ) is an ancient Iranian deity ('' yazata'') of covenants, light, oaths, justice, the Sun, contracts, and friendship. In addition to being the divinity of contracts, Mithra is also a judicial figure, an all-seeing protector of Truth (''Asha''), and the guardian of cattle, the harvest, and the Waters. The Romans attributed their Mithraic mysteries to Zoroastrian Persian sources relating to Mithra. Since the early 1970s, the dominant scholarship has noted dissimilarities between the Persian and Roman traditions, making it, at most, the result of Roman ''perceptions'' of Zoroastrian ideas. Etymology Together with the Vedic common noun ''mitra'', the Avestan common noun ''miθra'' derives from Proto-Indo-Iranian '' *mitrám'' (Mitra), from the root ''*mi-'' "to bind", with the "tool suffix" ''-tra-'' "causing to". Thus, etymologically ''mitra''/''miθra'' means "that which causes binding", preserved in the Avestan word for "Covenant, Contract, Oath". In Middle Ir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
