Dust Devils, Saturn’s Secrets And The Mystery Of An Ancient Eclipse
The October issue of the Royal Astronomical Society’s journal, “Astronomy and Geophysics”, contains the following feature articles.
Ptolemy, Babylon and the Rotation of the Earth
Many authors have questioned Ptolemy’s account of a lunar eclipse that was supposedly observed by the Babylonians. John Steele finds that Ptolemy was right to believe that Babylonian observers saw the eclipse of 23 December 383 BC - which poses a problem that can be solved by invoking a large clock error or unusual atmospheric conditions.
Inside Dust Devils
Dust devils are rotating columns of dust-laden air that are common on both Earth and Mars. T J Ringrose presents a new way to produce convective vortices in the lab, comparing the results with dust devils on these planets.
Cassini at Titan: The Story So Far
The Cassini spacecrafts first year examining Saturn and its moons has uncovered many surprises, not least the atmosphere and surface of the enigmatic moon Titan. Nick Teanby reviews the progress made and discusses prospects for the future.
Sounding The Dark Cosmos
Recent observations suggest that the universe has been accelerating rather than slowing down in the past few billion years. Bruce Bassett, Bob Nichol and Daniel J Eisenstein explain why the Wide Field Multi-Object Spectrograph, a proposed new instrument for the Gemini and Subaru telescopes, will need to look far into the universe, over a wide area, in order to map sound waves from the dawn of time and unravel the mystery of dark energy.
Promoting Planetary Science
Mike Hapgood summarizes the RASs position on planetary sciences in the UK, a subject that delivers world-class results, but needs focused support in order to continue to thrive.
(A summary of the RAS position was also issued in RAS press notice PN 05/39. The full statement is available on the RAS Web site.)
Dr. Sue Bowler | alfa
The most recent press releases about innovation >>>
Die letzten 5 Focus-News des innovations-reports im Überblick:
Spectrally narrow x-ray pulses may be “sharpened” by purely mechanical means. This sounds surprisingly, but a team of theoretical and experimental physicists developed and realized such a method. It is based on fast motions, precisely synchronized with the pulses, of a target interacting with the x-ray light. Thereby, photons are redistributed within the x-ray pulse to the desired spectral region.
A team of theoretical physicists from the MPI for Nuclear Physics (MPIK) in Heidelberg has developed a novel method to intensify the spectrally broad x-ray...
Physicists working with researcher Oriol Romero-Isart devised a new simple scheme to theoretically generate arbitrarily short and focused electromagnetic fields. This new tool could be used for precise sensing and in microscopy.
Microwaves, heat radiation, light and X-radiation are examples for electromagnetic waves. Many applications require to focus the electromagnetic fields to...
Strong light-matter coupling in these semiconducting tubes may hold the key to electrically pumped lasers
Light-matter quasi-particles can be generated electrically in semiconducting carbon nanotubes. Material scientists and physicists from Heidelberg University...
Fraunhofer IPA has developed a proximity sensor made from silicone and carbon nanotubes (CNT) which detects objects and determines their position. The materials and printing process used mean that the sensor is extremely flexible, economical and can be used for large surfaces. Industry and research partners can use and further develop this innovation straight away.
At first glance, the proximity sensor appears to be nothing special: a thin, elastic layer of silicone onto which black square surfaces are printed, but these...
3-D shape acquisition using water displacement as the shape sensor for the reconstruction of complex objects
A global team of computer scientists and engineers have developed an innovative technique that more completely reconstructs challenging 3D objects. An ancient...