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A New Twist on an Old Nebula: Image Analysis Shows Helix Nebula Shape Is Surprisingly Complex.
(From AScribe)
NASHVILLE, Tenn. -- In a process comparable to that of an artist who turns a two-dimensional canvas into a three-dimensional work of art, astronomers use the two dimensional images that they capture in their high-powered telescopes to reconstruct the three-dimensional structures of celestial objects.
The latest example of this reconstructive artistry is a new model of the Helix Nebula - one of the nearest and brightest of the planetary nebulae, which are the Technicolor clouds of dust and glowing gas produced by exploding stars. Efforts of this sort are providing important new insights into the process that stars like the sun go through just before their fiery deaths.
The analysis, published in the November issue of the Astronomical Journal, was conducted by a team of astronomers led by C. Robert O'Dell of Vanderbilt University. Combining sharp new images from…
- Astronomers Report Unprecedented Double Helix Nebula Near Center of Milky Way.
- News wire article from: Europe Intelligence Wire March 15, 2006 700+ words
...see the double helix nebula clearly. "We...has a strong magnetic field that is highly...hypothesizes that the magnetic field lines are anchored...twisting of the magnetic field lines that we see in the double helix nebula," Morris said...
- UCLA: UCLA scientists discover double-helix nebula.
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...to be a more general phenomenon," he said. The double-helix nebula is approximately 300 light-years from the enormous black...and spatial resolution were required to see the double-helix nebula clearly. Just as one can visualize magnetic fields by sprinkling...
- Magnetic-field-induced DNA strand breaks in brain cells of the rat.(Research)
- Magazine article from: Environmental Health Perspectives Lai, Henry Singh, Narendra P. May 1, 2004 700+ words
...hr) exposed to a 60-Hz sinusoidal magnetic field at intensities of 0.1-0.5 millitesla...In the present study, effects of magnetic field exposure on brain cell DNA in the rat...investigated. Exposure to a 60-Hz magnetic field at 0.01 mT for 24 hr caused a significant...
- Magnetic-field probe requires few components.
- Magazine article from: EDN December 15, 2006 700+ words
...meters," various makes and models of magnetic field meters are available on the market...magnetic-flux density and, in turn, magnetic-field intensity. Figure 1 illustrates the...voltage proportional to an applied magnetic field (Reference 1 ). Operating from a...
- Health effects of occupational exposure to static magnetic field in a...
- Magazine article from: Indian Journal of Occupational and Environmental Medicine Choobineh, A. Amirzadeh, F. May 1, 2005 700+ words
...period of their working time in the magnetic field produced by direct current through...Chloralkali plant and the TWA exposure to magnetic field was determined for each job classification...recommended level. Maximum TWA exposure to magnetic field was equal to 47.59 mT that was ...
- Effect of magnetic field on the formation of spin-polaron in Mn-Zn ferrites.
- Magazine article from: American Journal of Applied Sciences El-Sayed, H.M. October 1, 2006 700+ words
Abstract: The effect of magnetic field on the transport properties of...inverse relation with the applied magnetic field. This was attributed to the...strongly affected by the applied magnetic field. These results are explained...
- Magnetic field sensors [sic].
- Magazine article from: Test & Measurement World October 1, 2008 700+ words
...com We're immersed in the earth's magnetic field, but most of the time we're unaware...purity. Helmholtz coils provide a magnetic-field-free space for accurate evaluation...Ericson described how to construct a magnetic-field immunity tester from PVC pipe, plywood...
- A magnetostrictive torque sensor: a new fabrication technique solves the...
- Magazine article from: Sensors Magazine Andreescu, Radu Gupta, Mool C. Spellman, Bert November 1, 2004 700+ words
...nickel changed shape when placed in a magnetic field. This effect is called magnetostriction...as the Villari effect. If a helical magnetic field is applied to a material, then a twisting...which refers to the creation of a magnetic field when a material is subjected to a torque...
- Powerful appeal of Mars' 'missing' field. (magnetic field)
- Magazine article from: Science News Eberhart, J. March 10, 1990 700+ words
...Mars generates its own "intrinsic" magnetic field, as do Earth and most of the solar...researchers believe Mars once had such a magnetic field, and a far stronger one than any that...LETTERS that the weakening of a strong magnetic field could have had significant influences...
- Tracing corrosion's magnetic field.
- Magazine article from: Science News Peterson, Ivars August 30, 1986 700+ words
Tracing Corrosion's Magnetic Field The ravages of corrosion are...surfaces (see diagram). The magnetic field measurements were done with a...other out and generate no net magnetic field. With the magnetometer about...
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