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En esta pagina se pueden encontrar noticias actuales sobre descubrimientos de las ciencias y/o astronomía

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On August 21, for about two minutes across a swath of North America, Earth's moon will pass in front of and completely block out the sun, causing a total solar eclipse. Countless people are expected to witness this rare phenomenon, the first total solar eclipse in North America in 38 years. Just this week, scientists at Caltech and JPL decided that a small space telescope will be watching with them.

NuSTAR (Nuclear Spectroscopic Telescope Array) is a NASA mission led by Caltech and principal investigator Fiona Harrison, the Benjamin M. Rosen Professor of Physics and Kent and Joyce Kresa Leadership Chair of the Division of Physics, Mathematics and Astronomy. As the telescope orbits around Earth, it stares deep into the cosmos to measure the X-rays emitted from energetic phenomena such as supernovas. Occasionally, scientists will turn NuSTAR toward our sun, measuring X-rays from so-called active regions-spots where solar magnetic field lines collide, often causing plasma to blast into space, in a process called reconnection.

"Because it orbits near the equator, NuSTAR will only see a partial solar eclipse, about 30 percent of totality," says Brian Grefenstette, a research scientist on the NuSTAR team at Caltech. "However, we got lucky in that this partial eclipse will block out a single active region. As the moon's edge progressively covers the region, scientists will be able to determine with unusual precision how both the brightness and temperature of the region vary over its extent." Because of the unpredictability of where the active regions will fall relative to the regions blocked by the moon, NuSTAR's scientists only determined that they would be able to make these measurements a week before the eclipse.

Understanding the X-ray energy contained in an active region may be an important step toward solving a long-standing mystery: why the sun's corona-the vast, diffuse aura of plasma particles visible during a total eclipse-is so much hotter than its surface.

"Active regions are where the heating of the corona is most violent," says David M. Smith of UC Santa Cruz, who leads the NuSTAR solar science team. "Many small magnetic reconnection events may be the underlying cause. Using the eclipse to help us map out the region in X-rays will give us a unique data set to help test this theory."

NuSTAR is a Small Explorer mission led by Caltech and managed by NASA's Jet Propulsion Laboratory for NASA's Science Mission Directorate in Washington.

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NuSTAR to Observe Solar Eclipse | Caltech

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On August 21, for about two minutes across a swath of North America, Earth's moon will pass in front of and completely block out the sun, causing a total solar eclipse. Countless people are expected to witness this rare phenomenon, the first total solar eclipse in North America in 38 years.

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En esta pagina se pueden obtener noticias actuales sobre astronomía

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Globular Cluster Omega Centauri Looks Radiant in Infrared

A cluster brimming with millions of stars glistens like an iridescent opal in this image from NASA's Spitzer Space Telescope. Called Omega Centauri, the sparkling orb of stars is like a miniature galaxy. It is the biggest and brightest of the 150 or so similar objects, called globular clusters, that orbit around the outside of our Milky Way galaxy. Stargazers at southern latitudes can spot the stellar gem with the naked eye in the constellation Centaurus. Globular clusters are some of the oldest objects in our universe. Their stars are over 12 billion years old, and, in most cases, formed all at once when the universe was just a toddler. Omega Centauri is unusual in that its stars are of different ages and possess varying levels of metals, or elements heavier than boron. Astronomers say this points to a different origin for Omega Centauri than other globular clusters: they think it might be the core of a dwarf galaxy that was ripped apart and absorbed by our Milky Way long ago. In this new view of Omega Centauri, Spitzer's infrared observations have been combined with visible-light data from the National Science Foundation's Blanco 4-meter telescope at Cerro Tololo Inter-American Observatory in Chile. Visible-light data with a wavelength of .55 microns is colored blue, 3.6-micron infrared light captured by Spitzer's infrared array camera is colored green and 24-micron infrared light taken by Spitzer's multiband imaging photometer is colored red. Where green and red overlap, the color yellow appears. Thus, the yellow and red dots are stars revealed by Spitzer. These stars, called red giants, are more evolved, larger and dustier. The stars that appear blue were spotted in both visible and 3.6-micron-, or near-, infrared light. They are less evolved, like our own sun. Some of the red spots in the picture are distant galaxies beyond our own.

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NASA.gov brings you the latest news, images and videos from America's space agency, pioneering the future in space exploration, scientific discovery and aeronautics research.

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Web para encontrar imágenes reales astronómicas de todo tipo y en todos los filtros existentes

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Web para encontrar imágenes reales astronómicas de todo tipo y en todos los filtros existentes

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The Sloan Digital Sky Survey has created the most detailed three-dimensional maps of the Universe ever made, with deep multi-color images of one third of the sky, and spectra for more than three million astronomical objects. Learn and explore all phases and surveys-past, present, and future-of the SDSS.

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Web la cual contiene un programa para trabajar con imágenes astronómicas

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Web la cual contiene un programa para trabajar con imágenes astronómicas

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Astrometrica Shareware: Research grade CCD astrometry data reduction tool

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ADS de Harvard para buscar papers de astronomía y/o física

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ADS de Harvard para buscar papers de astronomía y/o física

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SAO/NASA ADS Custom Query Form Wed Aug 30 23:41:00 2017

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(Last, First M, one per line) Exact name matching Object name/ position search Require author for selection Require object for selection ( OR AND simple logic) (Combine with: OR AND) Publication Date between and (MM) (YYYY) (MM) (YYYY) Enter Title Words Require title for selection (Combine with: OR AND simple logic boolean logic) Enter Abstract Words/Keywords Require text for selection (Combine with: OR AND simple logic boolean logic) Return items starting with number

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Imagen ilustrativa de como se forman las ondas gravitacionales en el tejido espacio-tiempo

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Imagen ilustrativa de como se forman las ondas gravitacionales en el tejido espacio-tiempo

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Gráfica de como se forman las ondas gravitacionales por el merger de 2 agujeros negros

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Gráfica de como se forman las ondas gravitacionales por el merger de 2 agujeros negros

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Imagen modelada por computadora de un agujero negro

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Imagen modelada por computadora de un agujero negro

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Para crear este modelo se usaron datos reales siguiendo las ecuaciones de la relatividad general de Einstein.

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Horizonte de eventos de un agujero negro

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Horizonte de eventos de un agujero negro

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Modelo de un agujero negro como un plano

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Librería de documentos sobre agujeros negros

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Librería de documentos sobre agujeros negros

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El agujero negro más grande del universo | Documentales Universo

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El Secreto De Los Agujeros Negros - Que Pasa Si Entras En Uno?

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Cosmologia "El Agujero Negro y El Horizonte de Sucesos"

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▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ SUSCRÍBETE → → → http://adf.ly/1KkNhX ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ Este es la teoría mas interesante porque es una consecuencia de la Relatividad General. Para entender lo que es un agujero negro empecemos por una estrella como el sol. El sol tiene un diámetro de 1.390.000 kilómetros y una masa 330.000 veces superior a la de la Tierra.

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La NASA muestra cómo se forma un agujero negro al chocar dos estrellas

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Según sus propiedades físicas

Existe un teorema sobre propiedades de los agujeros negros que se suele enunciar diciendo que «un agujero negro no tiene pelo» (en inglés No-hair theorem); el teorema afirma que cualquier objeto que sufra un colapso gravitatorio alcanza un estado estacionario como agujero negro descrito sólo por tres parámetros: su masa su cargay su momento angular. Así tenemos la siguiente clasificación para el estado final de un agujero negro:

El agujero negro más sencillo posible es el agujero negro de Schwarzschild, que no rota ni tiene carga.

Si no gira pero posee carga eléctrica, se tiene el llamado agujero negro de Reissner-Nordstrøm.

Un agujero negro en rotación y sin carga es un agujero negro de Kerr.

Si además posee carga, hablamos de un agujero negro de Kerr-Newman.

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¿Como se clasifican los agujeros negros?

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¿Como se clasifican los agujeros negros?

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Podemos clasificar los agujeros negros con al menos 2 criterios.

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Aprender sobre la clasificación de los agujeros negros, como se forman y algunos de sus efectos

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Según la masa

Agujeros negros supermasivos: con masas de varios millones de masas solares. Se hallarían en el corazón de muchas galaxias. ...

Agujeros negros de masa estelar. Se forman cuando una estrella de más de 30-70 masas solares se convierte en supernova e implosiona. ...

Micro agujeros negros.