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Εργαλεία Θεμάτων | Τρόποι εμφάνισης |
#3796
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Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 1 Apr 2017 Split the Universe Image Credit: NASA, Erwin Schrödinger's CatUPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA - Stereo: D.Romeuf, G.Faury, P.Lamy Explanation: Just now, before you hit the button, two future universes are possible. After pressing the button, though, you will live in only one. A real-web version of the famous Schrödinger's cat experiment, clicking the red button in the featured astronaut image should transform that image into a picture of the same astronaut holding one of two cats -- one living, or one dead. The timing of your click, combined with the wiring of your brain and the millisecond timing of your device, will all conspire together to create a result dominated, potentially, by the randomness of quantum mechanics. Some believe that your personally-initiated quantum decision will split the universe in two, and that both the live-cat and dead-cat universes exist in separate parts of a larger multiverse. Others believe that the result of your click will collapse the two possible universes into one -- in a way that could not have been predicted beforehand. Yet others believe that the universe is classically deterministic, so that by pressing the button you did not really split the universe, but just carried out an action predestined since time began. We at APOD believe that however foolish you may feel clicking the red button, and regardless of the outcome, you should have a happy April Fool's Day. Tomorrow's picture: oyster stars ΠΗΓΗ: http://apod.nasa.gov/apod/astropix.html
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VmF Skisters of Mercy © An eye for an eye, will make us all blind... Mahatma Ghandi |
#3797
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Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2 Apr 2017 NGC 602 and Beyond Image Credit: X-ray: Chandra: NASA/CXC/Univ.Potsdam/L.Oskinova et al; Optical: Hubble: NASA/STScI; Infrared: Spitzer: NASA/JPL-Caltech Explanation: Near the outskirts of the Small Magellanic Cloud, a satellite galaxy some 200 thousand light-years distant, lies 5 million year young star cluster NGC 602. Surrounded by natal gas and dust, NGC 602 is featured in this stunning Hubble image of the region, augmented by images in the X-ray by Chandra, and in the infrared by Spitzer. Fantastic ridges and swept back shapes strongly suggest that energetic radiation and shock waves from NGC 602's massive young stars have eroded the dusty material and triggered a progression of star formation moving away from the cluster's center. At the estimated distance of the Small Magellanic Cloud, the Picture spans about 200 light-years, but a tantalizing assortment of background galaxies are also visible in this sharp multi-colored view. The background galaxies are hundreds of millions of light-years or more beyond NGC 602. Tomorrow's picture: Detailed Saturn ΠΗΓΗ: http://apod.nasa.gov/apod/astropix.html
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VmF Skisters of Mercy © An eye for an eye, will make us all blind... Mahatma Ghandi |
Οι παρακάτω χρήστες έχουν πει 'Ευχαριστώ' στον/στην pazo για αυτό το μήνυμα: | ||
Naias (13-04-17) |
#3798
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Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 3 Apr 2017 Saturn in Infrared from Cassini Image Credit: NASA, JPL-Caltech, SSI; Processing: Maksim Kakitsev Explanation: Many details of Saturn appear clearly in infrared light. Bands of clouds show great structure, including long stretching storms. Also quite striking in infrared is the unusual hexagonal cloud pattern surrounding Saturn's North Pole. Each side of the dark hexagon spans roughly the width of our Earth. The hexagon's existence was not predicted, and its origin and likely stability remains a topic of research. Saturn's famous rings circle the planet and cast shadows below the equator. The featured image was taken by the robotic Cassini spacecraft in 2014 in several infrared colors -- but only processed recently. In September, Cassini's mission will be brought to a dramatic conclusion as the spacecraft will be directed to dive into ringed giant. Tomorrow's picture: Contrail & Sun Halo ΠΗΓΗ: http://apod.nasa.gov/apod/astropix.html
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VmF Skisters of Mercy © An eye for an eye, will make us all blind... Mahatma Ghandi |
#3799
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Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 4 Apr 2017 Plane Contrail and Sun Halo Image Credit & Copyright: Alexandros Maragos Explanation: What's happened to the sky? Several common features of the daytime sky are interacting in uncommon ways. First, well behind the silhouetted hills, is the typically bright Sun. In front of the Sun are thin clouds, possibly the home to a layer of hexagonal ice crystals that together are creating the 22 degree halo of light surrounding the Sun. The unusual bent line that crosses the image is a contrail -- a type of cloud created by a passing airplane. Much of the contrail must actually be further away than the thin cloud because it casts a shadow onto the cloud, giving an unusual three-dimensional quality to the featured image. The featured image was taken in late January in the city of Patras in West Greece. Tomorrow's picture: odd galaxy out ΠΗΓΗ: http://apod.nasa.gov/apod/astropix.html
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VmF Skisters of Mercy © An eye for an eye, will make us all blind... Mahatma Ghandi Τελευταία επεξεργασία από το χρήστη pazo : 06-04-17 στις 09:06 |
#3800
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Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 5 Apr 2017 Filaments of Active Galaxy NGC 1275 Image Credit: Hubble Legacy Archive, ESA, NASA; Processing & Copyright: Domingo Pestana Explanation: What keeps these filaments attached to this galaxy? The filaments persist in NGC 1275 even though the turmoil of galactic collisions should destroy them. First, active galaxy NGC 1275 is the central, dominant member of the large and relatively nearby Perseus Cluster of Galaxies. Wild-looking at visible wavelengths, the active galaxy is also a prodigious source of x-rays and radio emission. NGC 1275 accretes matter as entire galaxies fall into it, ultimately feeding a supermassive black hole at the galaxy's core. This composite image, recreated from archival Hubble Space Telescope data, highlights the resulting galactic debris and filaments of glowing gas, some up to 20,000 light-years long. Observations indicate that the structures, pushed out from the galaxy's center by the black hole's activity, are held together by magnetic fields. Also known as Perseus A, NGC 1275 spans over 100,000 light years and lies about 230 million light years away. Tomorrow's picture: open space ΠΗΓΗ: http://apod.nasa.gov/apod/astropix.html
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VmF Skisters of Mercy © An eye for an eye, will make us all blind... Mahatma Ghandi Τελευταία επεξεργασία από το χρήστη pazo : 06-04-17 στις 09:06 |
#3801
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Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 6 Apr 2017 Dark Nebula LDN 1622 and Barnard's Loop Credit & Copyright: Leonardo Julio (Astronomia Pampeana) Explanation: The silhouette of an intriguing dark nebula inhabits this cosmic scene. Lynds' Dark Nebula (LDN) 1622 appears below center against a faint background of glowing hydrogen gas only easily seen in long telescopic exposures of the region. LDN 1622 lies near the plane of our Milky Way Galaxy, close on the sky to Barnard's Loop - a large cloud surrounding the rich complex of emission nebulae found in the Belt and Sword of Orion. Arcs along a segment of Barnard's loop stretch across the top of the frame. But the obscuring dust of LDN 1622 is thought to be much closer than Orion's more famous nebulae, perhaps only 500 light-years away. At that distance, this 1 degree wide field of view would span less than 10 light-years. Tomorrow's picture: castle eye view ΠΗΓΗ: http://apod.nasa.gov/apod/astropix.html
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VmF Skisters of Mercy © An eye for an eye, will make us all blind... Mahatma Ghandi |
#3802
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Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 8 Apr 2017 Zeta Oph: Runaway Star Credit & Copyright: 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. Tomorrow's picture: back again in 4385 ΠΗΓΗ: http://apod.nasa.gov/apod/astropix.html
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VmF Skisters of Mercy © An eye for an eye, will make us all blind... Mahatma Ghandi |
Οι παρακάτω χρήστες έχουν πει 'Ευχαριστώ' στον/στην pazo για αυτό το μήνυμα: | ||
Naias (13-04-17) |
#3803
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Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 9 Apr 2017 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. Tomorrow's picture: sky hole ΠΗΓΗ: http://apod.nasa.gov/apod/astropix.html
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VmF Skisters of Mercy © An eye for an eye, will make us all blind... Mahatma Ghandi |
Οι παρακάτω χρήστες έχουν πει 'Ευχαριστώ' στον/στην pazo για αυτό το μήνυμα: | ||
Oasis (09-04-17) |
#3804
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Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 10 Apr 2017 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. This Sunyaev–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. Tomorrow's picture: man, dog, sun ΠΗΓΗ: http://apod.nasa.gov/apod/astropix.html
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VmF Skisters of Mercy © An eye for an eye, will make us all blind... Mahatma Ghandi |
#3805
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Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 11 Apr 2017 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 atmosphere makes 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. Tomorrow's picture: open space ΠΗΓΗ: http://apod.nasa.gov/apod/astropix.html
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VmF Skisters of Mercy © An eye for an eye, will make us all blind... Mahatma Ghandi |
Οι παρακάτω χρήστες έχουν πει 'Ευχαριστώ' στον/στην pazo για αυτό το μήνυμα: | ||
Oasis (11-04-17) |
#3806
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Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 12 Apr 2017 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. Tomorrow's picture: galilean night ΠΗΓΗ: http://apod.nasa.gov/apod/astropix.html
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VmF Skisters of Mercy © An eye for an eye, will make us all blind... Mahatma Ghandi |
#3807
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Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 14 Apr 2017 Earth Shadow over Damavand Image Credit & Copyright: Majid Ghohroodi Explanation: Through crystal clear skies this beautiful panorama follows the curve of planet Earth's shadow rising across the top of the world. The tantalizing twilight view is composed of eight single frames captured from 4,000 meters above sea level at sunset on April 6. Just above the dark grey Earth-shadow boundary lies a fading, pinkish, anti-twilight arch. Also known as the belt of Venus, its reddened and back-scattered sunlight finally merges with the still blue eastern sky. Standing tall near center along the rugged horizon line is the distant sharp peak of Mount Damavand in the snowy Alborz mountains. A feature in Persian mythology and literature, Damavand is a stratovolcano reaching 5,610 meters above sea level, the highest peak in Iran and the Middle East. Tomorrow's picture: Orion and a phosphorescent sea ΠΗΓΗ: http://apod.nasa.gov/apod/astropix.html
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VmF Skisters of Mercy © An eye for an eye, will make us all blind... Mahatma Ghandi |
#3808
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Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 15 Apr 2017 Luminous Salar de Uyuni Image Credit & Copyright: Stephanie Ziyi Ye Explanation: A scene in high contrast this thoughtful night skyscape is a modern composition inspired by M. C. Escher's lithograph Phosphorescent Sea. In it, bright familiar stars of Orion the Hunter and Aldebaran, eye of Taurus the Bull, hang in clear dark skies above a distant horizon. Below, faintly luminous edges trace an otherworldly constellation of patterns in mineral-crusted mud along the Uyuni Salt Flat of southwest Bolivia. The remains of an ancient lake, the Uyuni Salt Flat, Salar de Uyuni, is planet Earth's largest salt flat, located on the Bolivian Altiplano at an altitude of about 3,600 meters. Escher's 1933 lithograph also featured familiar stars in planet Earth's night, framing The Plough or Big Dipper above waves breaking on a more northern shore. Tomorrow's picture: food for enceladus ΠΗΓΗ: http://apod.nasa.gov/apod/astropix.html
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VmF Skisters of Mercy © An eye for an eye, will make us all blind... Mahatma Ghandi |
#3809
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Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 16 Apr 2017 Life-Enabling Plumes above Enceladus Image Credit: Cassini Imaging Team, SSI, JPL, ESA, NASA Explanation: Does Enceladus have underground oceans that could support life? The discovery of jets spewing water vapor and ice was detected by the Saturn-orbiting Cassini spacecraft in 2005. The origin of the water feeding the jets, however, was originally unknown. Since discovery, evidence has been accumulating that Enceladus has a deep underground sea, warmed by tidal flexing. Pictured here, the textured surface of Enceladus is visible in the foreground, while rows of plumes rise from ice fractures in the distance. These jets are made more visible by the Sun angle and the encroaching shadow of night. A recent fly-through has found evidence that a plume -- and so surely the underlying sea -- is rich in molecular hydrogen, a viable food source for microbes that could potentially be living there. Tomorrow's picture: sky alive ΠΗΓΗ: http://apod.nasa.gov/apod/astropix.html
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VmF Skisters of Mercy © An eye for an eye, will make us all blind... Mahatma Ghandi |
#3810
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Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 18 Apr 2017 Night Glows Image Credit & Copyright: Taha Ghouchkanlu Explanation: What glows in the night? This night, several unusual glows were evident -- some near, but some far. The foreground surf glimmers blue with the light of bioluminescent plankton. Next out, Earth's atmosphere dims the horizon and provides a few opaque clouds. Further out, the planet Venus glows bright near the image center. If you slightly avert your eyes, a diagonal beam of light will stand out crossing behind Venus. This band is zodiacal light, sunlight scattered by dust in our Solar System. Much further away are numerous single bright stars, most closer than 100 light years away. Furthest away, also rising diagonally and making a "V" with the zodiacal light, is the central band of our Milky Way Galaxy. Most of the billions of Milky Way stars and dark clouds are thousands of light years away. The featured image was taken last November on the Iranian coast of Gulf of Oman. Tomorrow's picture: open space ΠΗΓΗ: http://apod.nasa.gov/apod/astropix.html
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VmF Skisters of Mercy © An eye for an eye, will make us all blind... Mahatma Ghandi |
Συνδεδεμένοι χρήστες που διαβάζουν αυτό το θέμα: 6 (0 μέλη και 6 επισκέπτες) | |
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