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Friday, December 9, 2016

Space “AIST” takes the blows of meteorites


Micrometeorite flows began to study the space satellite AIST-2D launched into orbit at an altitude of 490 kilometers in late April from the Baikonur “East”.


photo: pixabay.com

As reported by “MK” in IKP, SNIU, the satellite began to monitor the frequency of the stream of cosmic substance in the center of its orbit, allowing scientists hope to make in the future fields of space debris (micrometeorites belong to this category, like the wreckage of the spacecraft). In addition, AIST has started to conduct so-called direct measurement of the intensity of such flying objects. Still on the Earth on the satellite placed about ten samples of optical glass (2.5 cm each), which are commonly used in space telescopes. Flying in outer space, the satellite is periodically subjected to collision with micrometeorites, which, when applied to samples of glass, they form craters. Similar experiments were previously conducted only on the space station: the astronauts were exposed samples of glass and other materials on the outer surface, and then brought with you to Earth for further study in the laboratory. Long transportation, even if all the rules have led to contamination of the glass and not entirely accurate follow-up research.

Now the study of meteorite craters will be carried out in space, automatically, by satellite. Scientists on Earth will receive information about them remotely. Microcrater in glass samples will give professionals information about numerous parameters of space debris: its structure, flight speed, and most importantly, the extent of damage to the glass. In the future this will enable to predict more accurately the service life of the telescopic optics, to find the best ways to protect it.

In addition to models of optical glasses at the “Stork” fly 14 samples of photovoltaic converters (Fepow), and simply solar cells with various types of coatings on the basis of silicon. Thus, scientists want to find the most optimal variant for the efficiency and durability would be Fepam of the more expensive gallium arsenide.

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