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Everything Space
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Written by Everything Science
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Mar 11, 2005 at 06:53 PM |
MIAMI--(BUSINESS WIRE)--March 10, 2005--GlobeTel Communications Corp. (OTCBB:GTEL) today announced that its wholly owned subsidiary, Sanswire Networks, LLC, will be joined by two highly experienced and respected aeronautical engineers, Messrs. William Dodson and Michael Matarrese.
 | | Dr. Michael Matarrese (Photo: GlobeTel Communications Corp.) |
"As Sanswire grows, its needs grow with it and we are pleased to be able to attract such high quality professionals to our cause," stated Timothy Huff, Chief Executive Officer of GlobeTel. "The Stratellite has sparked the imagination of the aerospace industry and those who have the vision want to be a part of making history and with these professionals, we are increasing our expertise to achieve our goals. So I am extremely pleased to introduce our two new members to Sanswire," added Huff. Mr. William Dodson will serve as the Senior Structural Engineer of Sanswire. Bill has over twenty five years experience with premiere aerospace companies and government services, including Scaled Composites (who built the SpaceShipOne that won the Ansari X prize as well as the GlobalFlyer, which recently completed the first non-stop around the world flight, piloted by Steve Fossett), AeroVironment, NASA and the Air Force as an structural engineer, structural dynamicist, aeronautical engineer, project manager, and pilot. He is a hands-on engineer with extensive experience in the fast-paced design and construction of hi-efficiency vehicles, ranging from man and solar powered aircraft to high altitude UAVs, missiles, and spacecraft. Bill brings analytic and practical abilities in aerodynamics, composites, structures, fabrication, maintenance and piloting to bear on design integration. |
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Written by Everything Science
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Feb 22, 2005 at 02:35 AM |
Observing the edge of the famous Horsehead Nebula with the IRAM interferometer located on the Plateau de Bures (France), a team of French and Spanish astronomers discovered a large quantity of small hydrocarbon molecules. This is a surprise because the intense UV radiation illuminating the Nebula should destroy the small hydrocarbons near the edge. The astronomers suggest that these molecules might result from the fragmentation of giant molecules, called “polycyclic aromatic hydrocarbons†(PAHs).
More than 120 molecules have been observed in the interstellar medium, of which about twenty are small hydrocarbons. These hydrocarbons are an important component of the interstellar chemistry as they furnish a carbon skeleton needed to build more complex molecules. However, these small hydrocarbons are easily broken apart by the UV radiation from young stars. Therefore, astronomers try to understand how these molecules are regenerated in spite of their destruction by UV radiation.
 | In the overall picture of the Horsehead Nebula (copyright ESO), the white frame shows the region observed using the IRAM Interferometer. The upper right panel shows the emission of the C2H molecule, which is typical of small hydrocarbon emissions. The observed C2H emission is very similar to the PAHs emission, as observed in the same region by the ISO infrared satellite (lower right panel). |
In addition to these small hydrocarbons, giant molecules, called polycyclic aromatic hydrocarbons (PAHs), were detected in the early 1980’s, at infrared wavelengths. PAHs are aggregates made of tens to hundreds of mainly carbon and hydrogen atoms. Previous theoretical studies suggested that radiative fragmentation of the PAHs lead to small hydrocarbons. Jérôme Pety (IRAM, France) and his colleagues have now provided one major step toward validating this theoretical hypothesis. They observed the famous Horsehead Nebula with the IRAM Interferometer (Plateau de Bures, France) , to search for hydrocarbons and to compare their location with that of PAHs detected a few years ago with the ISO satellite in the same region. |
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Written by Everything Science
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Feb 19, 2005 at 02:16 AM |
Results which combine data from the joint NASA/ESA/ASI Cassini Huygens space mission and the Hubble Space Telescope, published in Nature today (17th February 2005), reveal that Saturn's auroras, long thought to be a cross between those of Earth and Jupiter, are in fact different and may even be unique to Saturn.
 | | The dancing light of the auroras on Saturn behaves in ways different from how scientists have thought possible for the last 25 years. New research by a team of US and European planetary scientists led by John Clarke of Boston University, USA, has overturned theories about how Saturn's magnetic field behaves and how its auroras are generated. Their results will be published in the February 17 issue of the journal Nature. |
Over several weeks Hubble snapped ultraviolet images of Saturn's aurora, whilst Cassini's radio and plasma wave science instrument (RPWS) recorded radio emissions from the same regions and the Cassini Plasma Spectrometer (CAPS) and Magnetometer (MAG) instruments measured the solar wind. All measurements were combined to reveal the most accurate glimpse yet of Saturn's auroras and the role of the solar wind in generating them.
The observations show that Saturn's auroras vary from day to day, as they do on Earth, moving around on some days and remaining stationary on others. But compared to Earth, where dramatic brightening of the auroras lasts only 10 minutes, Saturn's can last for days.
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Written by Everything Science
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Feb 18, 2005 at 10:47 PM |
Scientists have detected a flash of light from across the Galaxy so powerful that it bounced off the Moon and lit up the Earth's upper atmosphere. This "giant flare" was the brightest explosion ever detected from beyond the Solar System. For over a tenth of a second the remarkable flare was actually brighter than a full moon.
 | | Artist's impression of a shell of gamma-rays moving away from SGR 1806-20 following the outburst, and sweeping across the galaxy until they interact with the Earth. |
NASA and European satellites and ground-based telescopes around the world detected the giant flare on 27 December 2004. Scientists from twenty institutes joined the observations. Two science teams report about this unprecedented event in a forthcoming issue of Nature.
The light detected from the giant flare was far brighter in gamma rays than visible light or X-rays. It was probably created by an unprecedented eruption on the surface of an exotic neutron star which is classed both as an ultra-magnetic magnetar and as a soft gamma repeater (SGR). The designation of the neutron star that erupted is SGR 1806-20, about 50,000 light years from Earth in the constellation Sagittarius. |
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Written by Everything Science
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Jan 21, 2005 at 06:47 PM |
Extraterrestrial molecules found in meteorites may hold the key to the origin of life on Earth, according to chemistry research at the University.
Dr Terence Kee and a team from Leeds and Bradford universities are examining a particular source of phosphorus found naturally only in space to discover whether it could have helped form the building blocks of life.
Phosphorus is found in all living cells, but some scientists doubt that the most common form of phosphorus – phosphate – helped form life on earth due to its insolubility in water. Dr Kee believes the earliest forms of DNA/RNA could have been built from other phosphorus-containing molecules called phosphonates, because they are water-soluble and more reactive.
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