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Laniakea Supercluster
The Laniakea Supercluster (; Hawaiian language, Hawaiian for "open skies" or "immense heaven") or the Local Supercluster (LSC or LS) is the galaxy supercluster that is home to the Milky Way and approximately 100,000 other nearby galaxies. It was defined in September 2014, when a group of astronomers including R. Brent Tully of the University of Hawaiʻi at Mānoa, University of Hawaiʻi, Hélène Courtois of the University of Lyon, Yehuda Hoffman of the Hebrew University of Jerusalem, and Daniel Pomarède of CEA Université Paris-Saclay published a new way of defining superclusters according to the Radial velocity, relative velocities of galaxies. The new definition of the local supercluster subsumes the prior defined Virgo Supercluster, Virgo and Hydra-Centaurus Supercluster as appendages, the former being the prior defined local supercluster. Follow-up studies suggest that the Laniakea Supercluster is not gravitationally bound. It will disperse rather than continue to maintai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epoch (astronomy)
In astronomy, an epoch or reference epoch is a instant, moment in time used as a reference point for some time-varying astronomical quantity. It is useful for the celestial coordinates or orbital elements of a Astronomical object, celestial body, as they are subject to Perturbation (astronomy), perturbations and vary with time. These time-varying astronomical quantities might include, for example, the mean longitude or mean anomaly of a body, the node of its orbit relative to a reference plane, the direction of the apogee or Perihelion and aphelion, aphelion of its orbit, or the size of the major axis of its orbit. The main use of astronomical quantities specified in this way is to calculate other relevant parameters of motion, in order to predict future positions and velocities. The applied tools of the disciplines of celestial mechanics or its subfield orbital mechanics (for predicting orbital paths and positions for bodies in motion under the gravitational effects of other bodi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Daniel Pomarède
Daniel Pomarède (born October 3, 1971) is a staff scientist at the Institute of Research into the Fundamental Laws of the Universe, CEA Paris-Saclay University. He co-discovered Laniakea, our home supercluster of galaxies, and Ho'oleilana, a spherical shell-like structure 1 billion light-years in diameter found in the distribution of galaxies, possibly the remnant of a Baryon Acoustic Oscillation. Specialized in data visualization and cosmography, a branch of cosmology dedicated to mapping the Universe, he also co-authored the discoveries of the Dipole Repeller and of the Cold Spot Repeller, two large influential cosmic voids, and the discovery of the South Pole Wall, a large-scale structure located in the direction of the south celestial pole beyond the southern frontiers of Laniakea. Daniel Pomarède is science editor of Galaxy Science Fiction and If (magazine). Biography Daniel Pomarède graduated from the Interuniversity Magister degree in Physics of the École normal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antlia Wall
Antlia (; from Ancient Greek ''ἀντλία'') is a constellation in the Southern Celestial Hemisphere. Its name means "pump" in Latin and Greek; it represents an air pump. Originally Antlia Pneumatica, the constellation was established by Nicolas-Louis de Lacaille in the 18th century. Its non-specific (single-word) name, already in limited use, was preferred by John Herschel then welcomed by the astronomic community which officially accepted this. North of stars forming some of the sails of the ship Argo Navis (the constellation Vela), Antlia is completely visible from latitudes south of 49 degrees north. Antlia is a faint constellation; its brightest star is Alpha Antliae, an orange giant that is a suspected variable star, ranging between apparent magnitudes 4.22 and 4.29. S Antliae is an eclipsing binary star system, changing in brightness as one star passes in front of the other. Sharing a common envelope, the stars are so close they will one day merge to form a single st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Norma Cluster
The Norma Cluster (ACO 3627 or Abell 3627) is a rich cluster of galaxies located near the center of the Great Attractor; it is about distant. Although it is both nearby and bright, it is difficult to observe because it is located in the Zone of Avoidance, a region near the plane of the Milky Way. Consequently, the cluster is severely obscured by interstellar dust at optical wavelengths. Its mass is estimated to be on the order of 1015 solar masses. ESO 137-001, an example of a jellyfish galaxy, is located in Abell 3627. Gallery File:New Hubble image of spiral galaxy ESO 137-001.jpg, ESO 137-001 located in the Norma cluster File:A busy patch of the Great Attractor (8386658810).jpg, alt=, ESO 137-2 located in the Norma cluster See also * List of galaxy groups and clusters * Coma Cluster * Eridanus Cluster * Fornax Cluster * Virgo Cluster * X-ray astronomy References External links ESO Press Photos 46a-j/99* NASA The National Aeronautics and Space Administr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydra–Centaurus Supercluster
The Hydra–Centaurus Supercluster (SCl 128), or the Hydra and Centaurus Superclusters, was a previously defined supercluster in two parts, which prior to the identification of Laniakea Supercluster in 2014 is the closest neighbour of the former Virgo Supercluster. Its center is located about away, with it extending to a maximum distance of around . Physical characteristics The supercluster includes four large galaxy clusters in the Centaurus part, also known as the "4 clusters'' filament, or '' 4 clusters strand'': * Abell 3526 (Centaurus Cluster) * Abell 3565 * Abell 3574 * Abell 3581 The filament which also includes the major cluster Abell S753 and exends up to around to reach the rich galaxy cluster Abell 3581. Antlia Wall The Antlia Wall, also known as the Antlia Strand, Hydra Wall, Hydra-Antlia wall, Hydra-Antlia extension, and the Hydra-Antlia filament, is a filament that emeges from the Centaurus Cluster, passes under the Zone of Avoidance (ZOA) as the "Puppis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horologium Supercluster
The Horologium-Reticulum Supercluster, is a massive supercluster spanning around 550 million light-years. It has a mass of around 1017 solar masses, similar to that of the Laniakea Supercluster, which houses the Milky Way. It is centered on coordinates right ascension and declination , and spans an angular area of 12° × 12°. The nearest part of the supercluster is 700 million light-years away from Earth, while the far end of it is 1.2 billion light-years. It is visible in the constellations Horologium and Eridanus. The Horologium Supercluster has about 5,000 galaxy groups (30,000 giant galaxies and 300,000 dwarf galaxies). It includes the galaxy cluster Abell 3266. See also * Abell catalog * Large scale structure of the universe * List of Abell clusters * List of superclusters A supercluster is a large group of smaller galaxy clusters or galaxy groups; they are among the largest known structures in the universe. The Milky Way is part of the Local Group galaxy group (whic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nearby Superclusters
Nearby (previously named WNM Live / Who's Near Me) was a location-based social networking service launched in June 2010 and discontinued in September 2021 following a significant data breach. The service was created by Brian Hamachek and was known for leveraging the GPS technology in mobile devices to help users discover and interact with others located nearby, although explicitly not intended for dating, dating was the primary use case for the app. Background Nearby was founded by Brian Hamachek, a software developer with a background in creating interactive social applications. The platform was initially part of the Microsoft BizSpark program, reflecting its early adoption of Microsoft technologies. In November 2013, it was accepted into the Fall 2013 session of the Stanford StartX accelerator, signaling its growth and innovation in the social networking space. The application was designed to facilitate communication among users based on geographical proximity, a feature t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pacific Ocean
The Pacific Ocean is the largest and deepest of Earth's five Borders of the oceans, oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is bounded by the continents of Asia and Australia in the west and the Americas in the east. At in area (as defined with a southern Antarctic border), the Pacific Ocean is the largest division of the World Ocean and the hydrosphere and covers approximately 46% of Earth's water surface and about 32% of the planet's total surface area, larger than its entire land area ().Pacific Ocean . ''Encyclopædia Britannica, Britannica Concise.'' 2008: Encyclopædia Britannica, Inc. The centers of both the Land and water hemispheres, water hemisphere and the Western Hemisphere, as well as the Pole of inaccessi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polynesian Navigation
Polynesian navigation or Polynesian wayfinding was used for thousands of years to enable long voyages across thousands of kilometres of the Pelagic zone, open Pacific Ocean. Polynesians made contact with nearly every island within the vast Polynesian Triangle, using outrigger canoes or double-hulled canoes. The double-hulled canoes were two large hulls, equal in length, and lashed side by side. The space between the paralleled canoes allowed for storage of food, hunting materials, and nets when embarking on long voyages. Polynesian navigators used wayfinding techniques such as the navigation by the stars, and observations of birds, ocean swells, and wind patterns, and relied on a large body of knowledge from oral tradition. This island hopping was a solution to the scarcity of useful resources, such as food, wood, water, and available land, on the small islands in the Pacific Ocean. When an island’s required resources for human survival began to run low, the island's inhabitant ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nawaʻa Napoleon
Nāwa Napoleon is an associate professor of Hawaiian Language and chair of the Department of Languages, Linguistics, and Literature at Kapiʻolani Community College, University of Hawaiʻi. He is best known for suggesting the name of our supercluster, Laniakea. Napoleon has served as an educator, administrator and leader at Kapiʻolani Community College for more than three decades. He holds a Bachelor of Arts in Hawaiian studies from UH Hilo and a Master of Arts in Hawaiian studies from the University of Hawaiʻi at Mānoa. Awards *2015 "Educator of the Year" award by The Native Hawaiian Education Association. See also * Laniakea Supercluster The Laniakea Supercluster (; Hawaiian language, Hawaiian for "open skies" or "immense heaven") or the Local Supercluster (LSC or LS) is the galaxy supercluster that is home to the Milky Way and approximately 100,000 other nearby galaxies. It w ... References {{authority control Native Hawaiian scientists Academics from H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
