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X-Ray Motion

An imaging technique still in development is designed to rapidly superimpose three-dimensional models of bones onto two-dimensional x-ray images.

February 2, 2007

X-ray Proofing

To save himself, a physician enters the rag trade

May 1, 2003 — Steven Ashley

1896 X-Ray Machine Shows How Far We've Come

Researchers put an 1896 x-ray machine through its paces and found that it took 90 minutes to achieve exposures that take a fraction of a second today. Cynthia Graber reports

March 22, 2011

The X-Ray Sky

More than 120 celestial X-ray sources are now known; the list includes at least one neutron star, one quasar, two galaxies, one double source and perhaps even a black hole

July 1, 1972 — Herbert W. Schnopper and John P. Delvaille

X-Ray Stars

Rocket-borne instruments have detected a number of objects that are intense emitters of X rays. One of them is a star that produces as much energy in the form of X rays as the sun does at all wavelengths

December 1, 1967 — Riccardo Giacconi

Quasi-Periodic Oscillations in Celestial X-Ray Sources

Not quite periodic, not quite random fluctuations in X-ray intensity provide clues to the nature of extremely bright X-ray sources loosely clustered near the center of our galaxy

November 1, 1988 — Michiel van der Klis

X-Ray Riddle

Cosmic background is still unexplained

March 1, 1991 — Corey S. Powell

X-ray Binaries

In these systems, ultradense neutron stars feed on their more sedate companions. Such stellar cannibalism produces brilliant outpourings of x-rays and drastically alters the evolution of both stars

November 1, 1993 — Edward P. J. van den Heuvel and Jan van Paradijs

The Analysis of Materials by X-Ray Absorption

Tiny wiggles in the characteristic X-ray-absorption "signature" of an atom embedded in a solid can now be interpreted to provide clues to the exact spatial arrangement of the neighboring atoms

April 1, 1976 — Edward A. Stern

The Sources of Celestial X-Ray Bursts

They are probably caused by thermonuclear flashes on neutron stars In old binary systems. A single burst emits as much X-ray energy in a few seconds as the sun radiates at all wavelengths in two weeks

May 1, 1981 — Walter H. G. Lewin

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