El Salto de Soroa, bautizado como el Arcoíris de Cuba: una cascada de 22 metros de altura en la que además está permitido bañarse.
HOLGER LEUE
2017-04-13
Astronomy picture of the day - 2017 April 13 - Moons and Jupiter
Image Credit & Copyright: Göran Strand
Explanation: On April 10, a Full Moon and Jupiter shared this telephoto field of view. Both were near opposition, opposite the Sun in Earth's night sky. Captured when a passing cloud bank dimmmed the bright moonlight slightly, the single exposure reveals the familiar face of our fair planet's own large natural satellite, along with a line up of the ruling gas giant's four Galilean moons. Labeled top to bottom, the tiny pinpricks of light above bright Jupiter are Callisto,Europa, Ganymede, and Io. Closer and brighter, our own natural satellite appears to loom large. But Callisto, Ganymede, and Io are physically larger than Earth's Moon, while water world Europa is only slightly smaller. In fact, of the Solar System's six largest planetary satellites, only Saturn's moon Titan is missing from the scene.
2017-04-12
Astronomy picture of the day - 2017 April 12 - Leo Trio
Image Credit & Copyright: Ignacio Diaz Bobillo
Explanation: This group is popular in the northern spring. Famous as the Leo Triplet, the three magnificent galaxies gather in one field of view. Crowd pleasers when imaged with even modest telescopes, they can be introduced individually as NGC 3628 (left), M66 (bottom right), and M65 (top). All three are large spiral galaxies but they tend to look dissimilar because their galactic disks are tilted at different angles to our line of sight. NGC 3628 is seen edge-on, with obscuring dust lanes cutting across the plane of the galaxy, while the disks of M66 and M65 are both inclined enough to show off their spiral structure. Gravitational interactions between galaxies in the group have also left telltale signs, including the warped and inflated disk of NGC 3628 and the drawn out spiral arms of M66. This gorgeous view of the region spans about one degree (two full moons) on the sky. The field covers over 500 thousand light-years at the trio's estimated distance of 30 million light-years.
2017-04-11
Article - Médecine. Portugal - Soulever 40 kg ? Facile, avec ce gant intelligent
Un jeune entrepreneur portugais a mis au point un gant destiné à aider les blessés à la main.
Une blessure à la main, même légère, peut gravement limiter son usage. Filipe Quinaz en a fait l’amère expérience après une fracture, lorsqu’il était étudiant en biomédecine à l’université de Beira Interior (centre du Portugal). Le jeune homme a alors commencé à réfléchir à des solutions pour aider les personnes dans son cas.
Suivi en temps réel
Quelques années plus tard, le résultat est un gant qui permet de soulever jusqu’à 40 kg sans effort. Composé de textiles intelligents truffés de capteurs électroniques, il permet également aux soignants de suivre en temps réel l’évolution de l’état de la main de leurs patients. Le produit s’adresse en priorité “aux accidentés, aux personnes atteintes d’arthrite ou ayant souffert d’un AVC”, détaille le Diário de Notícias.
Nuada, la start-up fondée par Filipe Quinaz, a intégré début 2017 l’accélérateur Uten (University Technology Enterprise Network), fruit d’un partenariat entre le gouvernement portugais et l’université du Texas à Austin. L’entreprise espère pouvoir réaliser les premières préventes de son gant à l’été.
Courrier International - France
Astronomy picture of the day - 2017 April 11 - Man, Dog, Sun
Image Credit & Copyright: Jens Hackmann
Explanation: This was supposed to be a shot of trees in front of a setting Sun. Sometimes, though, the unexpected can be photogenic. During some planning shots, a man walking his dog unexpected crossed the ridge. The result was so striking that, after cropping, it became the main shot. The reason the Sun appears so large is that the image was taken from about a kilometer away through a telephoto lens. Scattering of blue light by the Earth's atmospheremakes the bottom of the Sun appear slightly more red that the top. Also, if you look closely at the Sun, just above the man's head, a large group of sunspots is visible. The image was taken just last week in Bad Mergentheim,Germany.
2017-04-10
Astronomy picture of the day - 2017 April 10 - Galaxy Cluster Gas Creates Hole in Microwave Background
Image Credit: ALMA (ESO/NAOJ/NRAO), Kitayama et al., NASA/ESA Hubble Space Telescope
Explanation: Why would this cluster of galaxy punch a hole in the cosmic microwave background (CMB)? First, the famous CMB was created by cooling gas in the early universe and flies right through most gas and dust in the universe. It is all around us. Large clusters of galaxies have enough gravity to contain very hot gas -- gas hot enough to up-scatter microwave photons into light of significantly higher energy, thereby creating a hole in CMB maps. ThisSunyaev–Zel'dovich (SZ) effect has been used for decades to reveal new information about hot gas in clusters and even to help discover galaxy clusters in a simple yet uniform way. Pictured is the most detailed image yet obtained of the SZ effect, now using both ALMA to measure the CMB and the Hubble Space Telescope to measure the galaxies in the massive galaxy cluster RX J1347.5-1145. False-color blue depicts light from the CMB, while almost every yellow object is a galaxy. The shape of the SZ hole indicates not only that hot gas is present in this galaxy cluster, but also that it is distributed in a surprisingly uneven manner.
2017-04-09
Astronomy picture of the day - 2017 April 9 - Comet Hale-Bopp Over Val Parola Pass
Image Credit & Copyright: A. Dimai, (Col Druscie Obs.), AAC
Explanation: Comet Hale-Bopp, the Great Comet of 1997, became much brighter than any surrounding stars. It was seen even over bright city lights. Away from city lights, however, it put on quite a spectacular show. Here Comet Hale-Bopp was photographed above Val Parola Pass in the Dolomite mountains surrounding Cortina d'Ampezzo, Italy. Comet Hale-Bopp's blue ion tail, consisting of ions from the comet's nucleus, is pushed out by the solar wind. The white dust tail is composed of larger particles of dust from the nucleus driven by the pressure of sunlight, that orbit behind the comet. Comet Hale-Bopp (C/1995 O1) remained visible to the unaided eye for 18 months -- longer than any other comet in recorded history. This year marks the 20th anniversary of Comet Hale-Bopp's last trip to the inner Solar System. The large comet is next expected to return around the year 4385.
2017-04-08
Astronomy picture of the day - 2017 April 8 - Zeta Oph: Runaway Star
NASA, JPL-Caltech, Spitzer Space Telescope
Explanation: Like a ship plowing through cosmic seas, runaway star Zeta Ophiuchi produces the arcing interstellar bow wave or bow shock seen in this stunning infrared portrait. In the false-color view, bluish Zeta Oph, a star about 20 times more massive than the Sun, lies near the center of the frame, moving toward the left at 24 kilometers per second. Its strong stellar wind precedes it, compressing and heating the dusty interstellar material and shaping the curved shock front. What set this star in motion? Zeta Oph was likely once a member of a binary star system, its companion star was more massive and hence shorter lived. When the companion exploded as a supernova catastrophically losing mass, Zeta Oph was flung out of the system. About 460 light-years away, Zeta Oph is 65,000 times more luminous than the Sun and would be one of the brighter stars in the sky if it weren't surrounded by obscuring dust. The image spans about 1.5 degrees or 12 light-years at the estimated distance of Zeta Ophiuchi.
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