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.
A Piece of Mars: No great scientific insights today, just a really lovely view of bright TARs and some very dark sand in this 0.875×0.5 km (0.54×0.31 mi) scene. Only one major wind acts in this region, moving sediment toward the west. Jezero crater, a prime landing site candidate for the Mars 2020 rover, lies 50 km to the west, so some of the sand blown into that crater passed through this area at some point in the past. (HiRISE, ESP_050899_1985, NASA/JPL/Univ. of Arizona)
A Piece of Mars: I often use JMARS to visualize Mars data sets, especially images. They’ve recently updated their 3D layer, allowing folks to make lovely vistas by overlaying DTMs with images. I’m new at this, but I’ll experiment and see what I can do to make nice views. Here’s a series of barchan dunes marching away from a tall stack of layers in Becquerel crater, with no vertical exaggeration. (HiRISE, DTEEC_045140_2015_044784_2015, NASA/JPL/Univ. of Arizona)
A Piece of Mars: This 523×750 m (0.32×0.47 mi) scene shows a large dune. It’s quite colorful for some reason, although it’s partially false-color. What caught my eye is that the slip face on this dune has reversed direction, which is somewhat rare on Mars (but common on Earth). The main sand-moving wind blows from the right, forming a long avalanching slope (you can see long bright lines of grain fall slips at the lower center). But at some point a wind blew from the left, forming a small slip face in the opposite direction. Although many other wind directions have also help to build this dune, those two are the main winds apparent here. (HiRISE ESP_050887_2225, NASA/JPL/Univ. of Arizona)
A Piece of Mars: The real tetrahedrons of Mars are dunes, built by winds blowing sand from more than one direction. This 0.5×0.5 km (0.31×0.31 mi) area shows a dune formed from two winds that are about 90 degrees apart: one blowing from the bottom and one blowing from the right. This makes the dune have two slip faces, which is a rare occurrence on Earth dunes. (Earth dunes are complicated by superposed secondary dunes that interfere with and obscure this pattern. Or if they’re small enough to not have those secondary dunes, then they are changing fast enough that one slip face will quickly erase the other. I’ve only ever seen two slip faces at once for very short periods in Earth dunes – they don’t last.) Here, the two winds have worked together to form a little spit of sand off to the upper left. The result is a 3-sided “pyramid”, with no advanced civilization required for its construction. (HiRISE ESP_050479_1360, NASA/JPL/Univ. of Arizona).
A Piece of Mars: In the dustiest regions of Mars, steep slopes occasionally produce very thin avalanches of dust, revealing a darker surface under the top layer of dust. This shows one that is 610 m (0.38 mi) long, running from its tiny point of initiation near the top of the slope down to the bottom of the slope where accumulated landslides have slowly buried old windblown dunes (or TARs). These landslides occur every spring, and may be triggered by sublimation of small accumulations of winter ice, or perhaps by the wind. This one formed some time between May 7, 2012 and May 22, 2013, as it appeared between two successive images of this spot. It’s still there today, most recently imaged on May 5, 2017, slowly accumulating dust until it fades into the background with the rest of the slope. (HiRISE ESP_035307_2115, NASA/JPL/Univ. of Arizona)
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A Piece of Mars: Having a bad day? You’re in good company with these dunes in this 0.96×0.48 km (0.6×0.3 mi) scene. The gray barchanoid dunes are covered in ripples, as the wind valiantly tries to push the sand to the dune crests. But they are besieged by other processes at work. Dark scribbles show how dust devils have swept by, removing dust and probably scattering a little bit of the sand. The steep slip faces are not covered in dry avalanches typical of active dunes, but rather they appear eroded, as if some force locked the dune in place and started eroding the surface wherever ripples couldn’t rescue it. Splotches on the tan ground between the dunes, and narrow furrows attest to seasonal ice reworking the surface. And in this great battle, what I wonder is: can those dunes have formed like this amidst such turmoil, or are they relics of an older, windier, perhaps less icy age? (HiRISE ESP_050488_1150, NASA/JPL/Univ. of Arizona)
A Piece of Mars: This 0.96×0.48 km (0.6×0.3 mi) scene shows a bit of a south polar dune field. The more recently-active dark sand is rippled, but there are bright splotches where something else has happened. Presumably it’s ground ice that sublimated away explosively, as happens at many high latitude locations on Mars, only here the dunes are stabilized enough that those spots aren’t eroded away by wind activity every summer. Because the dunes aren’t active, their crests have diminished to subtle bumps on the landscape (would you even know they were dunes if I hadn’t told you? Look at the whole HiRISE image to be sure!) (HiRISE ESP_013224_1080, NASA/JPL/Univ. of Arizona)
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A Piece of Mars: There are many barchans on Mars, those lovely isolated crescent-shaped dunes. In a few places there are what looks like ancient preserved barchans, now lithified. The mound in the center of this 0.96×0.54 km (0.6×0.33 mi) scene shows what may be an example of a fossil barchan. If so, then this is quite unusual. On Earth, dunes are very rarely preserved in their full form, usually having been at least partially eroded away before being preserved. I love how much geology is visible from orbit on Mars! (HiRISE ESP_049955_1665, NASA/JPL/Univ. of Arizona)