Latest X-ray Stories

Space Weather Impacts Pilots And Airline Passengers
2013-10-27 06:19:50

[ Watch the Video: Pilots And Passengers Absorb Cosmic Rays And Radiation ] redOrbit Staff & Wire Reports - Your Universe Online Thanks to space weather, airline pilots absorb approximately as much radiation over the course of a year as a nuclear power plant employee, NASA officials revealed on Friday. In fact, according to the US space agency, pilots are classified as “occupational radiation workers” by the Federal Aviation Administration (FAA) because they fly at heights...

Light Echoes From The Black Hole At The Heart Of The Milky Way
2013-10-25 05:25:40

[ Watch the Video: Time-Lapse of Supermassive Black Hole Sagittarius A* ] April Flowers for redOrbit.com - Your Universe Online During the last few hundred years, the dim region very close to the supermassive black hole near the center of the Milky Way has flared up with at least two luminous outbursts, according to a team of researchers using NASA's Chandra X-ray Observatory. A new study of rapid variations in the X-ray emissions from gas clouds surrounding Sagittarius A* (Sgr A*) -...

2013-10-17 23:02:50

Showcasing at AUSA 2013, new embedded video interface delivers size, power, and performance advantages while simplifying design of advanced cameras, x-ray detector panels, and imaging systems. Ottawa, Ontario, Canada (PRWEB) October 17, 2013 Pleora Technologies, the world's leading supplier of high-performance video interfaces, today introduced the industry’s first embedded hardware product for integrating GigE Vision 2.0™-compliant video connectivity into cameras, x-ray detector...

Why Do Lithium-ion-batteries Fail?
2013-10-17 15:36:16

ETH Zurich Lithium-ion batteries are in our cellphones, laptops, and digital cameras. Few portable electronic devices exist that do not rely on these energy sources. Currently battery electrodes contain active materials known as intercalation compounds. These materials store charge in their chemical structure without undergoing substantial structural change. That makes these batteries comparatively long-lived and safe. However, intercalation materials have one drawback: their limited...

2013-10-12 23:01:10

Diagnostic Imaging Market report evaluates the global diagnostic imaging market with respect to the product market. http://www.marketsandmarkets.com/Market-Reports/diagnostic-imaging-market-411.html (PRWEB) October 12, 2013 The “Global Diagnostic Imaging (CT, MRI, X-Ray & Ultrasound) Market - Competitive Landscape & Forecasts from 2010 to 2016” analyzes and studies the major market drivers, restraints, and opportunities in regions such as North America, Europe, Asia, and Rest...

2013-10-07 23:26:45

2013 Deep Research Report on Global and China Medical X-Ray Tube Industry is the new market research report added to the online library of DeepResearchReports.com. Dallas, Texas (PRWEB) October 07, 2013 This is a professional and in-depth study on the current state of the Medical X-Ray Tube industry in Global and China. The report provides a basic overview of the industry including definitions, applications and industry chain structure. Global market analysis and Chinese domestic market...

Latest X-ray Reference Libraries

2010-09-07 17:13:57

Abell 2142, also called A2142 and located in the constellation Corona Borealis, is an X-ray luminous galaxy cluster. Its creation is due to the merger between two galaxy clusters. It is one of the largest objects in the universe and is six million light years across. It holds hundreds of galaxies and enough gas to make a thousand more. The pressure fronts in the system have been traced in detail and are relatively cool 50 million degree Celsius. The central region is embedded in large...

2004-10-19 04:45:44

X-Ray Astronomy -- Although the more energetic X-rays (E > 30 keV) can penetrate the air at least for distances of a few meters (they would never have been detected and medical X-ray machines would not work if this was not the case) the Earth's atmosphere is thick enough that virtually none are able to penetrate from outer space all the way to the Earth's surface. X-rays in the 0.5 - 5 keV range, where most celestial sources give off the bulk of their energy, can be stopped by a few...

2004-10-19 04:45:43

X-ray Burster -- X-ray bursters are a class of binary stars which are luminous in X-rays. They contain a neutron star and a low-mass companion star. The companion fills its Roche lobe and therefore the neutron star is accreting matter from it. The inflowing gas forms an accretion disk around the neutron star. Sometimes X-ray bursters show a sudden increase in their X-ray luminosity, called X-ray burst. All properties of the X-ray bursts can be explained assuming that they result from...

2004-10-19 04:45:43

X-ray Binaries -- X-ray binaries are a class of binary stars that are very luminous in X-rays. The X-rays are produced by matter falling from one component (usually a relatively normal star) to the other component, which is a neutron star or a black hole. The infalling matter releases gravitational potential energy, up to several tens of per cent of its rest mass as X-rays. (Hydrogen fusion releases about 0.7 per cent of rest mass) X-ray binaries are further subdivided into...

2004-10-19 04:45:43

Variable Star -- Most stars are of nearly constant luminosity. Our own Sun is a good example which goes through practically no measurable variation in brightness. There are, however, stars which do vary in brightness, called variable stars. They fall into two main groups: Intrinsic variables These are stars which have intrinsic variations in brightness, that is the star itself gets brighter and dimmer. There are many types of intrinsic variables, the main types being: -- Mira...

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Word of the Day
  • A bookseller; now, especially, a dealer in rare and curious books.
This word comes from a Greek phrase meaning 'book seller.'