association, stellar
A loose grouping of young, hot stars, born more or less at the same time, with a total mass of 100 to 1,000 solar masses; ...
Because OB associations are young star-forming regions, they are located in regions of galaxies with lots of material from which stars can form. This means they are found in the spiral arms of gas-rich spiral galaxies.
Stellar association
A stellar association is a very loose star cluster, looser than both open clusters and globular clusters. Discovered by Viktor Ambartsumian in 1947.
American Association for the Advancement of Science
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association with
Abel (in Niels Henrik Abel (Norwegian mathematician))
Bolyai (in János Bolyai (Hungarian mathematician))
Eisenstein (in Ferdinand Gotthold Max Eisenstein (German mathematician)) ...
Association of galaxies at disparate redshifts. There are some amazing cases of objects with wildly different redshifts but showing the appearance of direct interaction.
Association
Groups of widely scattered stars (10 - 1000) moving together through space; not gravitationally bound to clusters.
Asterism ...
association Small grouping of (typically 100 or less) stars, spanning up to a few tens of parsecs across, usually rich in very young stars.
Association - A group of stars whose gravity is insufficient to hold it together but has not yet had time to disperse ...
Association football, more commonly known as football or soccer, is a team sport played between two teams of eleven players, and is widely considered to be the most popular sport in the world....
Association
A sparsely populated grouping (mass range 102-103 M) of very young, massive stars lying along a spiral arm of the Milky Way, whose spectral types or motions in the sky indicate a common origin.
T Associations
Stellar associations containing many T Tauri stars. About 20 are known. [H76]
T Tauri Stars ...
OB ASSOCIATION - Loose association of 10s or 100s of massive O and B stars scattered over several 100 light years. These form from a giant molecular cloud and are often surrounded by an HII region.
The Association of Lunar & Planetary Observers Scale
This seeing scale is often described simply as "a numerical sequence ranging from 0.0 (worst possible seeing) to 10.
Association of Universities for Research in Astronomy, Inc. (AURA)
A consortium of educational and other non-profit institutions that operates world-class astronomical observatories. Members include five international affiliates and 29 U.S.
Associations have 10-100 stars (e.g., OB, T Tauri). have 105-106 , 75 in diameter. Open clusters have 100-1000 , 10-100 in diameter.
, , ...
Association for Astronomy Education (Asociación para la Educación en Astronomía)
Canadian Astronomical Society (Sociedad Astronómica Canadiense)
Centro para Astrofísica del Ultravioleta Extremo ...
Association of Lunar and Planetary Observers (ALPO) astronomers MacFarlane, Aerts, and Parker photographed the Rima Tenuis.
© Association of Universities for Research in
Astronomy, Inc. (AURA). All Rights Reserved.
Digital Sky Survey, ESO -- larger image ...
T association - (n.)
A grouping of several T Tauri stars, presumably formed out of the same cloud of interstellar dust and gas.
technology - (n.) ...
The associations between radiation exposure and the development of cancer are mostly based on populations exposed to relatively high levels of ionizing radiation (e.g.
American Association of Variable Star Observers
American Astronomical Society
The American Meteor Society
British Astronomical Association
Centre de Données astronomiques de Strasbourg
H.M. Nautical Almanac Office ...
American Association for Critical Scientific
Investigation into Claimed Hauntings
Poltergeist debunked - AACSICH
Astronomes Amateurs du Luxembourg AAL ...
American Association of Variable Star Observers. AAVSO. Retrieved on 2006-08-24..
The American Meteor Society. Retrieved on 2006-08-24..
The International Occultation Timing Association. Retrieved on 2006-08-24..
Edgar Wilson Award.
American Association of Variable Star Observers
The Astronomical Society of the Pacific
Astronomy Picture of the Day
Chandra X-ray Observatory
The Constellations and their Stars
Earth and Sky, Skywatching
Earth and Sky, General Science ...
A similar association is depicted at the Temple of Hathor in Dendera, where the goddess Satet has drawn her arrow at Hathor (Sirius). Known as "Tir", the star was portrayed as the arrow itself in later Persian culture.
Sumer ...
Unlike the association of some meteoroids with the actual observed orbits of comets, direct orbital identification is not possible for meteoroids of asteroidal origin.
AAVSO: American Association of Variable Star Observers is an excellent site with a wealth of information and data on variable stars and eclipsing binaries.
The association between those two constellations predates Hercules, however, and came from Mesopotamia. Slaying of a multiheaded snake by Ninurta, the god of war, was mentioned on a cuneiform tablet from 2400 B.C.
association reactions (NASA Thesaurus) Gas phase chemical processes in which two molecular species A and B react to form a larger molecule AB.
The International Association of Astronomical Artists is a group of artists dedicated to the accurate and inspiring portrayal of the cosmos. They are constrained by science, but not by imagination.
Amateur Astronomers Association of Princeton - Princeton, New Jersey
Amateur Astronomers, Inc. - Cranford, New Jersey
AstroCruisers - Trenton, New Jersey
Astronomical Society of the Toms River Area - Toms River, New Jersey ...
Among its many uses, the most common are test of hypothesized probabilities or probability distributions (goodness of fit), statistical dependence or independence (association), and common population (homogeneity).
The first Babylonian month Nisan, dedicated to Anu and Bel, was that of " sacrifice "; and its association with the Ram as the chief primitive object of sacrifice is thus intelligible.
This is determined by locating young OB associations and related star forming regions. Young star clusters are associated with the spiral arms in a galaxy.
This is Shostak's favourite plan B: to generate a community of amateur astronomers all over the globe, very much like the American Association of Variable Stars, who would group together and search for optical pulses, ...
The correlation coefficient is a measure of linear association between two variables. Values of the correlation coefficient are always between -1 and +1.
Newton's Law of Gravitation provided a quantitative understanding of that association. Differential Forces
Consider a water molecule in the ocean.
"Scientists employed by the Universities Space Research Association (USRA) at NASA/GSFC work side by side with their Civil Service colleagues to analyze and interpret data from astronomical satellites, balloon instruments, ...
Pegasus was the winged horse best known for his association with the Greek hero Bellerophon. The manner of the horse's birth was unusual, to say the least.
The Space Telescope Science Institute is operated by the Association of Universities for Research in Astronomy, Inc. (AURA) for NASA, under contract with the Goddard Space Flight Center, Greenbelt, Md.
A loose association of stars with no clearly defined shape. Often referred to as 'Galactic Clusters' since they are all found close to the galactic plane (of our galaxy).
One of the most prolific stellar nurseries in the galaxies is known as the Scorpius-Centaurus Association.
Such a concentration of radiants in a small area of sky means that familiarity with where all the radiants are is essential for accurate shower association for all observing nights.
Cepheid variables: On 1st January 1925 at a joint meeting of the American Astronomical Society and the American Association for the Advancement of Science, ...
Under testimony, he could not identify any association of professionals in his claimed field of expertise.
org/ from the National Earth Science Teachers Association (NESTA). The Website was developed in part with the support of UCAR and NCAR, where it resided from 2000 - 2010. © 2010 National Earth Science Teachers Association.
The association with Bootes' dogs was a result of a mistranslation. The Greek word for cudgel in Ptolemy's original text, Almagest, was translated to Arabic to mean "the spearshaft having a hook.
Since compact neutron stars are the likely outcome of Type II supernova explosions, the discovery of a pulsar in the heart of the Crab makes the association between neutron stars and pulsars all the more certain.
NGC 6231, the Sco OB association
AAT 105. IC 4628, emission nebula in Scorpius
AAT 114. NGC 6242, an open cluster
AAT 121. M4, NGC 6121, globular cluster in Scorpius
UKS 4. Antares and the Rho Ophiuchi dark cloud (Scorpius/Ophiuchus)
UKS 10.
Maria Mitchell was the first woman accepted into the American Academy of Arts and Sciences (1848), the Association for the Advancement of Science (1850), and the American Philosophical Society (1869).
Open star cluster A loose association of stars numbering from a few dozen to hundreds.
Opposition When a celestial body is opposite the Sun in the sky.
Orbit The path followed by one body as it moves around another.
AAAS -- American Association for the Advancement of Science.
AACS -- Attitude and Articulation Control Subsystem onboard a spacecraft.
AAS -- American Astronomical Society.
The Astronomy Center, a teaching and learning resources databank for teachers of undergraduate astronomy that is provided by the American Astronomical Society in collaboration with the American Association of Physics Teachers and the ComPADRE project.
The BAA (British Astronomical Association) and IOTA (International Occultation Timing Association) websites and the monthly astronomy magazines publish predictions of lunar occultations ...
Some objects were kept because of their associations with the Observatory's great history. These celebrate the importance of the institution and its associations.
One year later, in 1880, professor Forbes published a memoir concerning the aphelia of comets and their association with planetary orbits.
The area in which an attractive or repelling force exists between two magnets or in association with the element iron. The Earth's magnetic field is thought to be due to the liquid iron-nickel which is in its core.
Searches will continue for further detections of the newfound body or bodies seen in association with the F ring. If the two objects indeed turn out to be a single moon, it will bring the Saturn moon count to 34.
Spica is Latin and means "The Ear of Wheat. This name suggests the association of Virgo with the Goddess of the Harvest, Ceres or Demeter. The Latin name Spica Virginis means nothing more than "The Virgin's Ear of Wheat." ...
 See also: Earth, Time, Light, Sun, Second
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