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Latest Accretion Stories

A New Take On Planetary Accretion
2012-02-29 09:39:21

The prevailing model for planetary accretion, also called fractal assembly, and dating back as far as the 18th century, assumes that the Solar System´s planets grew as small grains colliding chaotically, coalescing into bigger ones, colliding yet more until they formed planetesimals. The planetesimals then collided until they formed planets as varied as the Earth and Jupiter. The model assumes that this occurred in an extremely hot (as high as 1,600 degrees Celsius) environment for...

2011-08-09 15:05:00

EAST NORRITON, Pa., Aug. 9, 2011 /PRNewswire/ -- Tengion, Inc. (Nasdaq: TNGN) today provided a business update and reported its financial results for the second quarter ended June 30, 2011. "This is an important time for Tengion as we continue to make progress on our lead clinical and preclinical programs, as well as on our corporate and partnership strategy," said David Scheer, chairman of the Tengion board of directors. "Our search for a new chief executive officer is underway and our...

2011-03-03 07:30:00

NATICK, Mass., March 3, 2011 /PRNewswire/ -- Boston Scientific Corporation (NYSE: BSX) today announced the completion of its acquisition of Atritech, Inc. of Plymouth, Minnesota. The completion of the transaction follows the signing of a definitive merger agreement announced on January 19, 2011. Atritech's WATCHMAN® Left Atrial Appendage Closure Technology gives Boston Scientific an innovative product designed for atrial fibrillation patients with high stroke risk....

2011-01-28 06:30:00

RICHMOND, Va., Jan. 28, 2011 /PRNewswire/ -- Full-year 2010 operating earnings of $3.34 per share, in the upper half of original guidance range of $3.20 to $3.40 per share Full-year 2010 GAAP earnings of $4.68 per share Fourth-quarter 2010 operating earnings of 63 cents per share Fourth-quarter 2010 GAAP earnings of 43 cents per share Company affirms 2011 operating earnings guidance of $3.00 to $3.30 per share Company plans $400 million to $700 million equity repurchase in 2011...


Latest Accretion Reference Libraries

8_2c71772f2c3a31994d5208d4518632494
2004-10-19 04:45:44

Cosmogony -- Cosmogony is the study of the origins of celestial objects. It is most commonly used to refer to the study of the origin of the solar system. Currently, the most widely accepted theory is that the solar system was formed roughly 5 billion years ago with the collapse of a nebula of gas and dust, likely caused by shock waves generated by a nearby supernova. The solar system would have formed as a member of a star cluster, now long-since dispersed throughout the Milky Way over...

6_75b9b62fd255ef9e172fae83099783a52
2004-10-19 04:45:41

Accretion Disk -- An accretion disk is a structure formed by material falling into a gravitational source. Conservation of angular momentum requires that, as a large cloud of material collapses inward, any small rotation it may have will increase. Centrifugal force causes the rotating cloud to collapse into a disk, and tidal effects will tend to align this disk's rotation with the rotation of the gravitational source in the center. Friction between the particles of the disk generates heat...

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Word of the Day
baudekin
  • A rich embroidered or brocaded silk fabric woven originally with a warp of gold thread.
'Baudekin' seems to be an alternative form of 'baldachin,' from the Italian 'Baldacco,' Baghdad, the city where the material was made.
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