|
|
User Functions
|
|
|
Don't have an account yet? Sign up as a New User
|
|
|
|
Events Block
|
|
|
There are no upcoming events |
|
|
|
 |
|
New High-Tech Research Ship to Serve NOAA’s Flower Garden Banks Sanctuary
|
|
 |
Monday, July 07 2008 @ 07:17 AM CDT Contributed by: Admin
Views: 138
|
 <img width="200" height="150" align="left" src="http://www.unitedstates-america.net/images/articles/20080707071705720_1.jpg" alt="">(inan.info)<img width="200" height="135" align="right" src="http://www.unitedstates-america.net/images/articles/20080707071705720_2.jpg" alt="">Today, NOAA christened a new, state-of-the-art research vessel that will enhance the study and protection of Flower Garden Banks National Marine Sanctuary in the Gulf of Mexico. The 83-foot R/V Manta will operate out of Galveston, Texas, where the sanctuary is headquartered.
“This technologically advanced research vessel is a vital addition to our fleet,” said Daniel J. Basta, director of NOAA’s Office of National Marine Sanctuaries. “The Manta will open new windows onto the marine life and habitats of the Flower Garden Banks sanctuary while helping us protect this special place for future generations.”
Built in Bellingham, Wash., by All American Marine, the twin-hulled Manta features a laboratory equipped with the latest scientific instruments, air compressors to allow divers to refill scuba tanks at sea, and a recompression chamber to enhance diver safety. The vessel can hold up to 25 people, deploy robot subs and other ocean exploration tools, and cruise at
|
|
| |
 |
read more (229 words)
|
|
|
In Unique Stellar Laboratory, Einstein's Theory Passes Strict, New Test
|
|
 |
Sunday, July 06 2008 @ 06:42 AM CDT Contributed by: Admin
Views: 145
|
(inan.info)-Taking advantage of a unique cosmic configuration, astronomers have measured an effect predicted by Albert Einstein's theory of General Relativity in the extremely strong gravity of a pair of superdense neutron stars. Essentially, the famed physicist's 93-year-old theory passed yet another test.
Scientists at McGill University used the National Science Foundation's Robert C. Byrd Green Bank Telescope (GBT) to do a four-year study of a double-star system unlike any other known in the Universe. The system is a pair of neutron stars, both of which are seen as pulsars that emit lighthouse-like beams of radio waves.
"Of about 1700 known pulsars, this is the only case in which two pulsars orbit around each other," said Rene Breton, a graduate student at McGill University in Montreal, Canada. In addition, the stars' orbital plane is aligned nearly perfectly with their line of sight to the Earth. This causes the signal of one to be blocked, or eclipsed, as it circles the other.
"Those eclipses are the key to making a measurement that could never be done before," Breton said.
Einstein's 1915 theory predicted that in a close system of two very massive objects, such as neutron stars, one object's gravitational tug, along with an effect of its spinning around its axis, should cause the spin axis of the other to wobble, or precess.
Studies of other pulsars in binary systems had indicated that such wobbling occurred, but could not produce precise measurements of the amount of wobbling.
"Measuring the amount of wobbling is what tests the details of Einstein's theory and gives a benchmark that any alternative gravitational theories must meet," said Scott Ransom of the National Radio Astronomy Observatory.
The eclipses allowed the astronomers to pin down the geometry of the double-pulsar system and track changes in the orientation of the spin axis of one of them. As one pulsar's spin axis slowly moved, the pattern of signal blockages as the other passed behind it also changed. The signal from the pulsar in back is absorbed by the ionized gas in the other's magnetosphere.
Pulsars, first discovered in 1967, are the "corpses" of massive stars that have exploded as supernovae. What is left after the explosion is a superdense neutron star that packs more than the mass of our Sun into the size of an average city. Beams of radio waves stream outward from the poles of the star's intense magnetic field and sweep around as the star rotates, as often as
|
|
| |
 |
read more (253 words)
|
|
|
CU-Boulder Returns Nearly $3 Million In Cost Savings To NASA For Design And Operation Of Satellite
|
|
 |
Tuesday, June 17 2008 @ 09:31 PM CDT Contributed by: Admin
Views: 146
|
(inan.info)-The University of Colorado at Boulder took an unusual step today by returning nearly $3 million in cost savings to NASA for an award-winning satellite mission designed, built and controlled by the university to study how the sun's variation influences Earth's climate and atmosphere.
Known as the Solar Radiation and Climate Experiment, or SORCE, the $100 million mission centered at CU-Boulder's Laboratory for Atmospheric and Space Physics was launched by NASA in 2003 and is controlled from the LASP Space Technology Building at the CU Research Park. A $2,997,000 check for the cost savings from SORCE development and operations was presented by LASP officials to Ed Chang, NASA SORCE manager from the Goddard Spaceflight Center in Greenbelt, Md., at a LASP event June 17.
The SORCE mission budget total of $100 million from 1999 to 2008 included the design and development of the satellite's five instruments, as well as five-and-one-half years of operations, and did not include launch costs, said LASP Senior Research Associate Tom Woods, principal investigator of SORCE. The free-flying, 640-pound satellite was launched from Florida's Kennedy Space Center in January 2003 aboard a Pegasus expendable launch vehicle built by Orbital Sciences Corp. of Dulles, Va., which also constructed the SORCE satellite bus, or spacecraft vehicle.
According to Woods, SORCE's development cost savings are the result of a small, efficient management team, thorough pre-launch testing of prototype instruments and tight schedule adherence during the development phase. The cost savings during flight operations were
|
|
| |
 |
read more (877 words)
|
|
|
If a Tree Falls in the Forest, and No One Is Around to Hear It, Does Climate Change?
|
|
 |
Friday, June 13 2008 @ 08:27 AM CDT Contributed by: Admin
Views: 132
|
(inan.info)There are roughly 42 million square kilometers of forest on Earth, a swath that covers almost a third of the land surface, and those wooded environments play a key role in both mitigating and enhancing global warming.
In a review paper appearing in this week's Forest Ecology special issue of Science, atmospheric scientist Gordon Bonan of the Natinoal Science Foundation's National Center for Atmospheric Research in Boulder, Colo., presents the current state of understanding for how forests impact global climate.
"As politicians and the general public become more aware of climate change, there will be greater interest in legislative policies to mitigate global warming," said Bonan. "Forests have been proposed as a possible solution, so it is imperative that we understand fully how forests influence climate."
The teeming life of forests, and the physical structures containing them, are in continuous flux with incoming solar energy, the atmosphere, the water cycle and the carbon cycle--in addition to the influences of human activities. The complex relationships both add and subtract from the equations that dictate the warming of
|
|
| |
 |
read more (209 words)
|
|
First | Previous | 1 2 3 4 5 | Next | Last |
 |
|
UnitedStates-America.net
|
|
|
Welcome to our site. We welcome your information, ideas and thoughts. Please feel free to "get published", add your press releases for others to view, write your own articles, put in your own dates and events and participate with UnitedStates-America.net.
|
|
|
|
Add Your Press Release
|
|
|
Now You Can Add Your Own Press Release for FREE! Just click on "Get Published" and add your important information. UnitedStates-America.net is inviting all who want newsmedias all over the world to read their news releases to enter it HERE for FREE. This is a MUST opportunity for all those wanting to get their business information into the main-stream media. Now for a limited time, YOU can have your press release covered right here and available for news outlets all over the world.
|
|
|
|
Whats New
|
|
STORIES No new stories
COMMENTS last 48 hrs No new comments
LINKS last 2 wks No recent new links
|
|
|
|