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Heavens-Above Home Page

Heavens-Above Home Page
Related:  Astronomía

The Internet map The map of the Internet Like any other map, The Internet map is a scheme displaying objects’ relative position; but unlike real maps (e.g. the map of the Earth) or virtual maps (e.g. the map of Mordor), the objects shown on it are not aligned on a surface. Mathematically speaking, The Internet map is a bi-dimensional presentation of links between websites on the Internet. Every site is a circle on the map, and its size is determined by website traffic, the larger the amount of traffic, the bigger the circle. Charges and springs To draw an analogy from classical physics, one may say that websites are electrically charged bodies, while links between them are springs. Also, an analogy can be drawn from quantum physics. Anyway, the real algorithm of plotting The Internet map is quite far from the analogies given above. Semantic web The map of the Internet is a photo shot of the global network as of end of 2011 (however, baloons show actual statistics from Alexa). The Internet Phenomenon

Virtual Star Party ¿Hibernarán astronautas de la NASA? -Muy Interesante México espacio/ 17/10/14 Las misiones tripuladas al espacio presentan numerosos desafíos. Entre ellos, optimizar al máximo la capacidad de una nave. Actualmente, gran parte del espacio interior es destinado a almacenar la enorme cantidad de agua y alimento que requiere la tripulación para sobrevivir el viaje de meses, incluso años. Así como para incluir las áreas de ejercicio, relajación y trabajo que requieren para mantener su salud mental. (Criterios psicológicos para ser astronauta) Ahora la NASA propone una nueva solución para capitalizar el diseño de las astronaves y reducir el costo de las misiones: inducir en la tripulación un estado de hibernación. La noción de que los exploradores espaciales preserven sus cuerpos mediante la suspensión criogénica ha sido explorado en numerosas obras de ciencia ficción. De acuerdo con la NASA, la suspensión animada eliminaría la necesidad de alojar cocinas, aparatos de gimnasia y habitaciones dentro de la nave.

October 24, 1999 - The Magnetic Carpet Of The Sun Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. October 24, 1999 The Magnetic Carpet Of The Sun Credit: SOHO Consortium, ESA, NASA Explanation: The Sun has a magnetic carpet. Its visible surface appears to be carpeted with tens of thousands of magnetic north and south poles joined by looping field lines which extend outward into the Solar Corona. Tomorrow's picture: Neptune Past Red Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)NASA Technical Rep.: Jay Norris.

The Kneeslider — Doers and Builders Congregate Here Astronomy Photographer of the Year 2011 9 September 2011Last updated at 09:44 From giant oval storms on the surface of Jupiter to colourful wispy remnants from a supernova explosion and the dazzling green curtain of the Northern Lights - nearly 800 images were submitted for the latest Astronomy Photographer of the Year competition. Take a look at some of the winning photos with two of the judges from the Royal Observatory Greenwich, public astronomer Marek Kukula and astronomy programmes manager Olivia Johnson. Continue reading the main story Click the bottom right of the slideshow for detailed captions. The judges' choice of the best images can be seen in a free exhibition at the Royal Observatory Greenwich, London, until February 2012. Astronomy Photographer of the Year is run by the Royal Observatory Greenwich and Sky at Night Magazine. Music courtesy KPM Music. Related: National Maritime Museum - Astronomy Photographer of the Year 2011 Royal Observatory Greenwich Sky at Night Magazine More audio slideshows: Probing plasma

COSMOS: Un Espacio-tiempo Odyssey October 8, 1998 - Far Side of the Moon Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. October 8, 1998 Explanation: Locked in synchronous rotation, the Moon always presents its well-known near side to Earth. Q code The Q code is a standardized collection of three-letter message encodings, also known as a brevity code, all of which start with the letter "Q", initially developed for commercial radiotelegraph communication, and later adopted by other radio services, especially amateur radio. Although Q codes were created when radio used Morse code exclusively, they continued to be employed after the introduction of voice transmissions. To avoid confusion, transmitter call signs are restricted; while an embedded three-letter Q sequence may occur (for instance when requested by an amateur radio station dedicated to low-power operation), no country is ever issued an ITU prefix starting with "Q". The codes in the range QAA–QNZ are reserved for aeronautical use; QOA–QQZ for maritime use and QRA–QUZ for all services. Early developments[edit] The following table reviews a sample of the all-services Q codes adopted by the 1912 Convention: Later usage[edit] Breakdown by service[edit] Amateur radio[edit]

pour connaitre la position de la station spatiale internationale au-dessus d'un lieu donné. by naturesetsciences Jul 23

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