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Bright Spots On Ceres
Several bright surface features (also known as ) were discovered on the dwarf planet Ceres by the ''Dawn'' spacecraft in 2015. The brightest cluster of spots ("Spot 5") is located in an crater called Occator. The largest and brightest component of the cluster is in the center of the crater, with dimmer spots located towards this crater's eastern rim. Early in the orbital phase of the ''Dawn'' mission, the high albedo of these spots was speculated to be due to some kind of outgassing, and subsequent closer images helped scientists determine that it is a material with a high level of reflection, and suggested ice and salt as possibilities. These bright features have an albedo of about 40%, four times brighter than the average of Ceres's surface. On 9 December 2015, scientists reported that the bright spots on Ceres may be related to a type of salt, particularly a form of brine containing hydrated magnesium sulfate (MgSO4·6H2O); the spots were also found to be associated ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phys
Physics is the scientific study of matter, its Elementary particle, fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force. "Physical science is that department of knowledge which relates to the order of nature, or, in other words, to the regular succession of events." It is one of the most fundamental scientific disciplines. "Physics is one of the most fundamental of the sciences. Scientists of all disciplines use the ideas of physics, including chemists who study the structure of molecules, paleontologists who try to reconstruct how dinosaurs walked, and climatologists who study how human activities affect the atmosphere and oceans. Physics is also the foundation of all engineering and technology. No engineer could design a flat-screen TV, an interplanetary spacecraft, or even a better mousetrap without first understanding the basic laws of physics. (...) You will come to see physics as a towering achievement of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isostasy
Isostasy (Greek wikt:ἴσος, ''ísos'' 'equal', wikt:στάσις, ''stásis'' 'standstill') or isostatic equilibrium is the state of gravity, gravitational mechanical equilibrium, equilibrium between Earth's crust (geology), crust (or lithosphere) and mantle (geology), mantle such that the crust (geology), crust "floats" at an elevation that depends on its thickness and density. This concept is invoked to explain how different topographic heights can exist at Earth's surface. Although originally defined in terms of continental crust and mantle, it has subsequently been interpreted in terms of lithosphere and asthenosphere, particularly with respect to oceanic island volcanoes, such as the Hawaiian Islands. Although Earth is a dynamic system that responds to loads in many different ways, isostasy describes the important limiting case in which crust and mantle are in static equilibrium. Certain areas (such as the Himalayas and other convergent margins) are not in isostatic equili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mascon
In astronomy, astrophysics and geophysics, a mass concentration (or mascon) is a region of a planet's or moon's crust that contains a large positive gravity anomaly. In general, the word "mascon" can be used as a noun to refer to an excess distribution of mass on or beneath the surface of an astronomical body (compared to some suitable average), such as is found around Hawaii on Earth. However, this term is most often used to describe a geologic structure that has a positive gravitational anomaly associated with a feature (e.g. depressed basin) that might otherwise have been expected to have a negative anomaly, such as the "mascon basins" on the Moon. Lunar mascons The Moon is the most gravitationally "lumpy" major body known in the Solar System. Its largest mascons can cause a plumb bob to hang about a third of a degree off expected vertical, pointing toward the mascon, and increase the force of gravity by one-half percent. Typical examples of mascon basins on the Moon are the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Space
Space is a three-dimensional continuum containing positions and directions. In classical physics, physical space is often conceived in three linear dimensions. Modern physicists usually consider it, with time, to be part of a boundless four-dimensional continuum known as '' spacetime''. The concept of space is considered to be of fundamental importance to an understanding of the physical universe. However, disagreement continues between philosophers over whether it is itself an entity, a relationship between entities, or part of a conceptual framework. In the 19th and 20th centuries mathematicians began to examine geometries that are non-Euclidean, in which space is conceived as '' curved'', rather than '' flat'', as in the Euclidean space. According to Albert Einstein's theory of general relativity, space around gravitational fields deviates from Euclidean space. Experimental tests of general relativity have confirmed that non-Euclidean geometries provide a bet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scientific American
''Scientific American'', informally abbreviated ''SciAm'' or sometimes ''SA'', is an American popular science magazine. Many scientists, including Albert Einstein and Nikola Tesla, have contributed articles to it, with more than 150 Nobel Prize-winners being featured since its inception. In print since 1845, it is the oldest continuously published magazine in the United States. ''Scientific American'' is owned by Springer Nature, which is a subsidiary of Holtzbrinck Publishing Group. History ''Scientific American'' was founded by inventor and publisher Rufus Porter (painter), Rufus Porter in 1845 as a four-page weekly newspaper. The first issue of the large-format New York City newspaper was released on August 28, 1845. Throughout its early years, much emphasis was placed on reports of what was going on at the United States Patent and Trademark Office, U.S. Patent Office. It also reported on a broad range of inventions including perpetual motion machines, an 1860 devi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sky & Telescope
''Sky & Telescope'' (''S&T'') is a monthly magazine covering all aspects of amateur and professional astronomy, including what to see in the sky tonight and new findings in astronomy. Other topics covered include: *observing guides for planets, galaxies, star clusters, and other objects visible in the night sky *reviews of telescopes and other astronomical equipment, books, and software *events in the amateur astronomy community * amateur telescope making * astrophotography The articles are intended for the informed lay reader and include detailed discussions of current discoveries, frequently by participating scientists. The magazine is illustrated in full color, with both amateur and professional photography of celestial sights, as well as tables and charts of upcoming celestial events. History ''Sky & Telescope'' was founded by Charles A. Federer and his wife Helen Spence Federer. The duo had formed the Sky Publishing Corporation in late 1939 to manage a magazine called '' T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BBC News
BBC News is an operational business division of the British Broadcasting Corporation (BBC) responsible for the gathering and broadcasting of news and current affairs in the UK and around the world. The department is the world's largest broadcast news organisation and generates about 120 hours of radio and television output each day, as well as online news coverage. The service has over 5,500 journalists working across its output including in 50 foreign news bureaus where more than 250 foreign correspondents are stationed. Deborah Turness has been the CEO of news and current affairs since September 2022. In 2019, it was reported in an Ofcom report that the BBC spent £136m on news during the period April 2018 to March 2019. BBC News' domestic, global and online news divisions are housed within the largest live newsroom in Europe, in Broadcasting House in central London. Parliamentary coverage is produced and broadcast from studios in London. Through BBC English Regions, th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swinburne University Of Technology
The Swinburne University of Technology (or simply Swinburne) is a public university, public research university in Melbourne, Australia. It is the modern descendant of the Eastern Suburbs Technical College established in 1908, renamed Swinburne Technical College in 1913 after its co-founders George Swinburne, George and Ethel Swinburne. It has three campuses in metropolitan Melbourne: Hawthorn, Victoria, Hawthorn, where its main campus is located; Wantirna, Victoria, Wantirna; and Croydon, Victoria, Croydon, as well the Swinburne University of Technology Sarawak Campus in the East Malaysian state of Sarawak. It also offers courses online and through its partnered institutions in Australia and overseas. The university offers study programs in Bachelor of Commerce, commerce, Health care, healthcare, teacher education, Jurisprudence, law, engineering, Flight training, aviation, architecture, the performing arts and various other fields including in the arts and sciences. It also of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Astronomical Union
The International Astronomical Union (IAU; , UAI) is an international non-governmental organization (INGO) with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreach, education, and development through global cooperation. It was founded on 28 July 1919 in Brussels, Belgium 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. the Union had 85 national members and 12,734 individual members, spanning 90 countries and territories. 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] |
Vinalia
The Vinalia were Roman festivals of the wine harvest, wine vintage and gardens, held in honour of Jupiter and Venus. The ''Vinalia prima'' ("first Vinalia"), also known as the ''Vinalia urbana'' ("Urban Vinalia") was held on 23 April to bless and sample last year's wine and ask for good weather until the next harvest. The ''Vinalia rustica'' ("Rustic Vinalia") was on 19 August, before the harvest and grape-pressing. Vinalia Urbana The ''Vinalia Urbana'' was held on 23 April. It was predominantly a wine festival, shared by Venus as patron of " profane" wine (''vinum spurcum'') intended for everyday human use, and Jupiter as patron of the strongest, purest, sacrificial grade wine (''temetum''). In honour of Venus, whose powers had provided humankind with ordinary wine, men and women alike sampled the ''vinum spurcum'' of the previous autumn's pressing. As god of the weather on which the wine-harvest depended, Jupiter was offered a special libation of the previous year's sacred wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cerealia
In ancient Roman religion, the Cerealia was the major festival celebrated for the grain goddess Ceres. It was held for seven days from mid- to late April. Various agricultural festivals were held in the "last half of April". The Cerealia celebrated the harvest, and may have begun on the 19th. Surviving descriptions of Rome's city festival of Ceres are presumably urban versions of an originally rustic, agricultural festival. In his treatise on agriculture, Cato the Elder recommends that farmers sacrifice a sow (''porca praecidanea'') to Ceres, before the harvest. The Cerealia is listed on the oldest Roman calendars, and its institution in the city is attributed to the semi-legendary King Numa, in the earliest Regal period. The festival's archaic, agricultural nature is shown by a nighttime ritual described by Ovid. Blazing torches were tied to the tails of live foxes, who were released, possibly into the Circus Maximus. The origin and purpose of this ritual is unknown; it may ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
