When our solar system was young, its biggest babies--Jupiter and Saturn--threw tantrums by the trillion. The huge planets hurled ice-covered rocky bodies from the inner solar system far past the orbit of Pluto. Some of those bodies revisit their old neighborhood as "long period" comets, which have been called the Rosetta Stone of the solar system because their pristine composition holds the key to understanding how Earth and similar planets formed. Astrophysicists from the University of Minnesota and the Spitzer Science Center (California Institute of Technology) will present sharp pictures of comets and their dust trails, as well as data on comets chemical composition, taken during the Spitzer Space Telescopes first year of operation during a poster session and press conference Tuesday, Jan. 11, at the American Astronomical Society meeting in San Diego.
Unlike the Hubble Space Telescope, Spitzer does not oribt Earth; instead, it travels behind the Earth in the same orbital path. It operates at infrared wavelengths, which enables it to see objects and material too cold to emit visible light. This is possible because even cold objects radiate heat to their surroundings as long as the surroundings are even colder. That heat is given off as infrared radiation; the cooler the object, the longer the wavelength of infrared light it emits.
The astrophysicists who will present the studies are Robert Gehrz, a University of Minnesota astronomy professor and key member of the team that focused Spitzer in orbit; Charles "Chick" Woodward and Michael Kelley, astronomy professor and graduate student, respectively, at the university; and William T. Reach of the Spitzer Science Center at the California Institute of Technology.
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A new manufacturing technique uses a process similar to newspaper printing to form smoother and more flexible metals for making ultrafast electronic devices.
The low-cost process, developed by Purdue University researchers, combines tools already used in industry for manufacturing metals on a large scale, but uses...
For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.
To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...
For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.
Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...
Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.
A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...
Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.
"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....
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