2017年7月19日 – Mountain View, CA & Meyreuil, France: SETI研究所とフランスのスタートアップ企業 Unistellar社は、アマチュア天文学者に比類ない宇宙の展望と、最先端の科学に直接貢献する機会を与える新しい望遠鏡を商品化するための、新しいパートナーシップを締結しました。
Unistellarの新しいsVscope™ は、「Enhanced Vision」技術を採用し、このパートナーシップによりこれまでは提供することができなかった3つのユニークな特徴を持っています。
A Piece of Mars: This 2.88×1.13 km (1.79×0.70 mi) scene shows quintessential Mars, with a 670 m diameter impact crater heavily modified by wind erosion. Both the crater floor and the surrounding terrain are covered by what is likely loosely-cemented dust. The texture is that of wind-eroded materials, but to make this texture that material must be fine-grained and uniform in cementation (except where punctuated by craters that are, in turn, also wind-eroded). I’ve never seen a texture like that on Earth. Check out the whole HiRISE image to see how extensive that texture is (and note that I’ve only shown it at half-scale here!) – it’s the dominant feature of this landscape for many hundreds of kilometers. This is in Daedalia Planum, high terrain just southwest of the Tharsis Montes, where equatorial easterly winds might be enhanced by nighttime downslope winds coming down Arsia Mons, the southernmost of the three volcanos (HiRISE ESP_017651_1670, NASA/JPL/Univ. of Arizona)
A Piece of Mars: Along the right side of this 0.5×0.5 km (0.31×0.31 mi) scene is the rim of a crater – the stripes are layers exposed (and then perhaps draped by falling ejecta) as the crater formed. To the left is the crater’s interior wall, dropping downward. Deep gullies have been eroded into the crater walls, probably by water, carrying sediment downslope. Rivers and landslides are generally great sources of sand-sized sediment, and this place is no exception. The sediment piled up downslope, and then the wind came along and sculpted it into beautiful cross-hatched patterns (click on the image to see full resolution). (HiRISE ESP_015984_1335, NASA/JPL/Univ. of Arizona)
A Piece of Mars: The large dunes in the middle of this 375×450 m (0.23×0.28 mi) scene run along a valley (the small dunes at top and bottom are on high ground). What’s amazing about this is that the ends of the large dunes extend into the valley walls. That is, they’re covered by the stuff in the valley walls. Usually dunes sit on top of all the other geologic structures, but not here. These dunes formed a long time ago. And then a lot of sediment piled on top of them – but without destroying them (which is what usually happens on Earth, so we don’t see this sort of thing here). And then those sediments were later eroded to make the 0.5 km wide valley, revealing the buried dunes. Look at all this geology we can do from space! (HiRISE ESP_018347_1660, NASA/JPL/Univ. of Arizona)
19 de julho de 2017 -Mountain View, CA e Meyreuil, França: o Instituto SETI e a startup francesa Unistellar, anunciaram hoje uma parceria para comercializar um novo telescópio que promete oferecer uma visão incomparável do cosmos aos astrônomos amadores e oferecer a oportunidade de contribuir diretamente para ciência de ponta.
O novo eVscope™ da Unistellar aproveita a tecnologia de imagem “Enhanced Vision” e agora oferece três recursos únicos nunca antes oferecidos em um instrumento compacto de mercado de massa graças a esta parceria:
O Enhanced Vision produz imagens extremamente nitidas e detalhadas de objetos astronômicos até mesmo fracos, acumulando a luz e projetando-a na ocular do telescópio. A tecnologia Enhanced Vision imita a capacidade de coleta de luz de telescópios de refletor significativamente maiores, oferecendo visões sem precedentes de objetos do céu noturno anteriormente inacessíveis aos astrônomos amadores. (more…)
A Piece of Mars: This 0.7×0.5 km (0.43x.31 mi) scene shows Mars’ giant yellow bubble wrap, with each “bubble” about 100 m across (seriously, don’t you want to pop them?). These are actually a type of dune called a “dome dune”, and they’re about as small as this type of martian dune can get. Dome dunes form where the wind blows from one main wind direction, but shifts a bit in direction (we call it a “wide unimodal distribution”). These are near the north pole, and at this time of year (early northern spring), they’re still covered in winter frost, with a light powdering of dust to make them yellow. You can see spots where the underlying dark sand is just beginning to show through as the sun sublimates the ice. (HiRISE, ESP_050886_2565, JPL/NASA/Univ. of Arizona).
A Piece of Mars: Sand dunes are one of the few sedimentary phenomena that leave behind layers that aren’t horizontal. They tend to have a characteristic lean to them (and we call them cross-strata). So when I see something that looks like tilted layers on Mars, I take notice. This 0.625×0.5 km (0.39×0.31 mi) scene shows a steep slope, the side of a narrow graben system called Sirenum Fossae. The cliff starts at the top where overhanging rocks make shadows, and it ends at the bottom where there are small dunes. Along the slope are many narrow gullies from where sediment has slid downslope. And if you look carefully (click to see the whole image), you’ll see small diagonal lines aligned from upper-right to lower-left.
So are those diagnoal lines the strata produced by ancient dunes? Probably not. I think not, mostly because you can still see those diagonal lines in the gully aprons near the bottom of the slope – and those gullies were made by stuff sliding down this steep graben slope, not dunes. Also, there are a few boulders on the slope that might have wind-tails behind them. If that’s what they are, then these diagonal lines in the graben wall were made by a wind blowing diagonally up the slope, scouring away material as it went.
So, probably not dunes. But still aeolian. And very cool.
(HiRISE ESP_050882_1430, NASA/JPL/Univ of Arizona)
SETI Institute y organización francesa Unistellar, anunciaron una asociación para comercializar un nuevo telescopio que promete entregar imágenes sin paralelo del cosmo a los astrónomos amateurs y proporcionar la oportunidad de contribuir de forma directa a ciencia de punta.
Nuevo eVscope™ de Unistelar eleva la tecnología de imagen “visión mejorada” y proporciona tres características únicas nunca antes incluidas en instrumentos compactos para el mercado masivo, gracias a esta asociación.
July 19 2017 -Mountain View, CA & Meyreuil, France: The SETI Institute and French startup Unistellar, announced a partnership today to commercialize a new telescope that promises to deliver an unparalleled view of the cosmos to amateur astronomers, and provide the opportunity to contribute directly to cutting-edge science.
Unistellar’s new eVscope™ leverages “Enhanced Vision” imaging technology and now provides three unique features never before offered in a compact mass-market instrument thanks to this partnership:
Enhanced Vision produces extremely sharp, detailed images of even faint astronomical objects by accumulating their light and projecting it into the telescope’s eyepiece. Enhanced Vision technology mimics the light gathering capability of significantly larger reflector telescopes, thus delivering unprecedented views of night-sky objects previously inaccessible to amateur astronomers. (more…)
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19 juillet 2017 Mountain View, Californie, Etats Unis et Meyreuil, France — L’Institut SETI et la start-up française Unistellar annoncent aujourd’hui un partenariat, dans le but de commercialiser un nouveau télescope offrant aux astronomes amateurs une qualité d’observation du ciel sans précédent, ainsi que l’opportunité de contribuer de façon déterminante aux dernières découvertes des astronomes professionnels.
L’eVscopeTM (Enhanced Vision Telescope) d’Unistellar atteint cet objectif grâce à trois fonctions qui n’ont jamais encore été rassemblées au sein d’un appareil compact et destiné au grand public:
La Vision Amplifiée, qui fournit des images exceptionnelles, fines et détaillées des objets astronomiques les plus lointains en accumulant la lumière et en la projetant directement dans l’oculaire du télescope. La technologie de la Vision Amplifiée remplace la capacité qu’ont les grands télescopes à accumuler la lumière, et fournit ainsi à l’oculaire de l’eVscope des images du ciel jusqu’à présent inaccessibles aux astronomes amateurs.