The Armagh Observatory’s ‘Human Orrery’ is the first large outdoor exhibit in the world to show accurately the elliptical orbits and changing relative positions of the planets and other solar system bodies with time. It has been constructed with the support of the Northern Ireland Department of Culture, Arts and Leisure (DCAL) and is the first major addition to the Observatory Grounds and Astropark for more than a decade. A ceremony to mark its construction will take place at the Observatory on the morning of Friday 26th November.
An orrery is a dynamic model of the solar system, designed to show the positions, relative orbits and distances of the planets about the Sun. It shows the orbital periods of objects revolving around the Sun and can be used to illustrate a wide range of celestial phenomena, including planetary alignments, conjunctions, transits, and the laws of orbital mechanics.
The name ‘Orrery’ for the first orrery, which was invented 300 years ago by the English clockmaker and inventor George Graham (c.1674–1751), was popularized by the Irish essayist Sir Richard Steele (1672–1729), in honour of Charles Boyle (1674–1731), the fourth Earl of Orrery. The name has since been attached to any device designed to show the planetary motions.
Tune your radio: galaxies sing while forming stars
21.02.2017 | Max-Planck-Institut für Radioastronomie
Breakthrough with a chain of gold atoms
17.02.2017 | Universität Konstanz
In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport
Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...
The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.
The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...
Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...
Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".
Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...
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