The Hubble space telescope
The power for Hubble’s scientific discoveries comes from solar cells. Designing and constructing Hubble’s first two sets of solar cell arrays constituted a huge technological achievement for the European Space Agency and European industry. After an in-orbit life of more than 8 years, this example of pioneering space technology was this morning (European time) replaced by new, more powerful arrays.
For the last week a dedicated team of engineers, technicians and scientists from the European Space Agency (ESA) has been focused intensely on the exchange of the solar arrays on the ESA/NASA Hubble Space Telescope. Based at NASA’s Goddard Space Flight Centre, which is the nerve centre for these operations, the team has spent an intense few days supporting NASA in the exchange of the solar arrays.
Team leader, project manager Ton Linssen from ESA’s Science Directorate at ESTEC, the Netherlands, explains: "The new arrays are yet another step in the longstanding, international partnership between ESA and NASA. ESA provided the first two sets of solar arrays, and for the third pair ESA and European industry designed, developed and tested the drive mechanisms which manoeuvre the arrays so that they stay pointed at the Sun. ESA was also involved in a unique testing of the new arrays in October 2000, which had never been done before. In the huge test chamber at ESTEC the rapid temperature change around sunset and sunrise in orbit can be simulated and any, even very small, movement of the arrays can be measured. Our facility is the only place in the world where this can be done."
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Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.
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The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...
With innovative experiments, researchers at the Helmholtz-Zentrums Geesthacht and the Technical University Hamburg unravel why tiny metallic structures are extremely strong
Light-weight and simultaneously strong – porous metallic nanomaterials promise interesting applications as, for instance, for future aeroplanes with enhanced...
An interdisciplinary group of researchers interfaced individual bacteria with a computer to build a hybrid bio-digital circuit - Study published in Nature Communications
Scientists at the Institute of Science and Technology Austria (IST Austria) have managed to control the behavior of individual bacteria by connecting them to a...
Physicists in the Laboratory for Attosecond Physics (run jointly by LMU Munich and the Max Planck Institute for Quantum Optics) have developed an attosecond electron microscope that allows them to visualize the dispersion of light in time and space, and observe the motions of electrons in atoms.
The most basic of all physical interactions in nature is that between light and matter. This interaction takes place in attosecond times (i.e. billionths of a...
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11.12.2017 | Event News