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Latest X-ray Stories

Three of 51 distant quasars ranging from about 5 billion to 11.5 billion light years from Earth
2015-05-02 10:29:42

These black holes are always hungry and are huge! Constantly gorging yourself on gas 'donuts' can do that to you.

Stars Gather in 'Downtown' Milky Way
2015-05-01 12:45:11

Braaaaaains. A mysterious high-energy X-ray signal detected by NuSTAR could be the sounds of “zombie” stars feeding on the “brains” of nearby stellar companions, according to research published recently in the journal Nature.

2015-04-28 08:35:03

EVERETT, Wash., April 28, 2015 /PRNewswire/ -- Unfors RaySafe, the global leader of X-ray quality assurance solutions, released a new radiation Survey sensor aimed at expanding the RaySafe X2

2015-04-22 23:07:20

Founded in 1984, InventHelp is attempting to submit the Tube Safe to applicable companies in the hopes of a good faith review. PITTSBURGH, PA (PRWEB) April 22,

black hole
2015-04-21 06:37:57

Dartmouth astrophysicists and their colleagues have not only proven that a supermassive black hole exists in a place where it isn't supposed to be, but in doing so have opened a new door to what things were like in the early universe.

ngc6388
2015-04-18 10:38:49

In Star Wars, the Death Star is a massive spaceship capable of destroying a planet with just one shot of its laser, but a recently-discovered white dwarf star may have ripped apart a planet at its core by coming too close to it, making it a real-life Death Star.

2015-04-15 12:25:17

PLEASANTON, Calif., April 15, 2015 /PRNewswire-iReach/ -- For many years the lack of sub 3 A (angstrom) high-resolution structures solved by single particle cryo-electron microscopy (cryo-EM)

2015-04-02 08:35:49

Jordan Valley receives order for its QC3 HRXRD Metrology System from AIXTRON's US Development Center MIGDAL HAEMEK, Israel, April 2, 2015 /PRNewswire/ -- Jordan

2015-04-01 23:01:16

RnRMarketResearch.com adds “Electrophysiology Market by Product (Diagnostic Catheter (Conventional, Advanced, Ultrasound)), Ablation Catheter (Cryoablation, RF, Microwave), Lab Devices (Mapping,


Latest X-ray Reference Libraries

45_690367cb500d467ab67d8f7503f9bc96
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...

7_d6897d09acee1dd0c34d0fbf62ff7d0b2
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...

6_1446abbc556d86191d7944d6c5cf68052
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...

6_48ed76f36ff2f4ed0ad83a22964029652
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...

6_f1577ee462b741c03ef6a7d23d2cd6905
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
meacock
  • An uxorious, effeminate, or spiritless man.
  • A timorous, cowardly fellow.
Probably a blend of meek and cock, or from meek +‎ -ock (“diminutive suffix”).