Explanation: In this colorful mosaic, filaments of gas and dust span some 9 degrees across central Cygnus, a nebula rich constellation along the northern Milky Way. A trio of nebulae with popular names highlights the beautiful skyscape - the Butterfly, the Crescent, and the Tulip. At left, the Butterfly Nebula (IC 1318), lies near bright star Gamma Cygni. The Butterfly's expansive, glowing, wing-shaped gas clouds are divided by a dark dust lane. Near center, the Crescent Nebula (NGC 6888) is more compact, a cosmic bubble with a bright edge blown by winds from a massive Wolf-Rayet star. On the right is the Tulip Nebula (Sh2-101), a small emission region shaped like a blossoming flower viewed from the side. All are within a few thousand light-years of the Sun in the Orion spiral arm of our galaxy. The gorgeous mosaic is presented in false color, constructed from image data recorded through narrow band filters. The range of colors was created by a mapping of emission from hydrogen, sulfur and oxygen atoms in the nebula to red, green, and blue hues.
Источник: apod.nasa.gov
Кадр дня: Лесные пожары на северо-западе Индии
7 ноября 2008
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В рубрике "Кадр дня" NASA возвратилось к теме лесных пожаров. Новый снимок, сделанный спутником Aqua, демонстрирует довольно большое количество очагов возгораний, зафиксированных в северо-западной части Индии. Ну а шлейф от пожарищ растянулся на сотни километров.
Источник: Nasa, Novosti-kosmonavtiki.ru
clon31, 8.11.2008 - 10:43
Кадр дня: On the Trail of 2008 TC3
8 ноября 2008
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On the Trail of 2008 TC3 Credit: Mohamed Elhassan Abdelatif Mahir (Noub NGO), Dr. Muawia H. Shaddad (Univ. Khartoum), Dr. Peter Jenniskens (SETI Institute/NASA Ames)
Explanation: On October 7, the early dawn over northern Sudan revealed this twisted, high altitude trail. Captured in a video frame, the long-lasting persistent train is from the impact of a small asteroid cataloged as 2008 TC3. That event was remarkable because it was the first time an asteroid was detected in space before crashing into planet Earth's atmosphere. In fact, after astronomers discovered 2008 TC3, the time and location of its impact were predicted based on follow-up observations. Later, the impact predictions were confirmed by sensors, including a Meteosat-8 image of a bright flash in the atmosphere. Astronomers are now hoping for more reports of local ground-based observations of what must have been a brilliant meteor streaking through Sudan's night sky. Additional reports could improve the chances of recovering meteorites.
Источник: apod.nasa.gov
Кадр дня: Шлейф пыли над Средиземным морем
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Пылевая буря, бушующая на севере Африки, столь мощна, что шлейф поднятого в воздух песка растянулся на сотни километров и словно копье прорезал голубые просторы Средиземного моря. Очень хорошо это видно на фотографиях, сделанных спутниками. Один из снимков NASA поместило в свою рубрику "Кадр дня".
Источник: Nasa, Novosti-kosmonavtiki.ru
clon31, 9.11.2008 - 10:22
Кадр дня: Two Black Holes Dancing in 3C 75
9 ноября 2008
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Two Black Holes Dancing in 3C 75 Credit: A. Ginsburg (U. Colorado - Boulder) et al., BGPS Team, GLIMPSE II Team
Explanation: What's happening at the center of active galaxy 3C 75? The two bright sources at the center of this composite x-ray (blue)/ radio (pink) image are co-orbiting supermassive black holes powering the giant radio source 3C 75. Surrounded by multimillion degree x-ray emitting gas, and blasting out jets of relativistic particles the supermassive black holes are separated by 25,000 light-years. At the cores of two merging galaxies in the Abell 400 galaxy cluster they are some 300 million light-years away. Astronomers conclude that these two supermassive black holes are bound together by gravity in a binary system in part because the jets' consistent swept back appearance is most likely due to their common motion as they speed through the hot cluster gas at 1200 kilometers per second. Such spectacular cosmic mergers are thought to be common in crowded galaxy cluster environments in the distant universe. In their final stages the mergers are expected to be intense sources of gravitational waves.
Источник: apod.nasa.gov
Кадр дня: Острова Принца Эдуарда
9 ноября 2008
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В южной части Индийского океана есть небольшой архипелаг - острова Принца Эдуарда. Снежный "ком" на одном из островов - "подарок" лежащей неподалеку Антарктиды. Снимок, сделанный камерами спутника Aqua, опубликован в рубрике NASA "Кадр дня".
Источник: Nasa, Novosti-kosmonavtiki.ru
clon31, 10.11.2008 - 11:00
Кадр дня: Our Galaxy s Central Molecular Zone
10 ноября 2008
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Our Galaxy's Central Molecular Zone Credit: A. Ginsburg (U. Colorado - Boulder) et al., BGPS Team, GLIMPSE II Team
Explanation: The central region of our Milky Way Galaxy is a mysterious and complex place. Pictured here in radio and infrared light, the galaxy's central square degree is highlighted in fine detail. The region is known as the Central Molecular Zone. While much of the extended emission is due to dense gas laced with molecules, also seen are emission nebulas lit up by massive young stars, glowing supernova remnants, and the curving Galactic Center Radio Arc in purple. The identity and root cause for many other features remains unknown. Besides a massive black hole named Sgr A*, the Galactic Center houses the galaxy's most active star forming region. This image is not just interesting scientifically. It's esthetic beauty won first prize this year in the AUI/NRAO Image Contest.
Источник: apod.nasa.gov
Кадр дня: Пожары в Куинслэнде
10 ноября 2008
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Около месяца назад NASA уже публиковало в рубрике "Кадр дня" снимок лесных пожаров в австралийском штате Куинслэнд. С тех пор стихию так и не удалось обуздать, поэтому новая фотография этого же района и продолжающихся пожаров.
Источник: Nasa, Novosti-kosmonavtiki.ru
Рея глазами "Кассини"
10 ноября 2008
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Лаборатория реактивного движения распространила 8 ноября снимок спутника Сатурна Рея, сделанный камерами межпланетного зонда Cassini. Фотографирование велось 17 июля нынешнего года с расстояния 1,2 миллиона километров.
Источник: Novosti-kosmonavtiki.ru
clon31, 11.11.2008 - 16:52
Кадр дня: The Cosmic Web of the Tarantula Nebula
11 ноября 2008
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The Cosmic Web of the Tarantula Nebula Credit & Copyright: Joseph Brimacombe
Explanation: First cataloged as a star, 30 Doradus is actually an immense star forming region in nearby galaxy The Large Magellanic Cloud. The region's spidery appearance is responsible for its popular name, the Tarantula nebula, except that this tarantula is about 1,000 light-years across, and 180,000 light-years away in the southern constellation Dorado. If the Tarantula nebula were at the distance of the Orion Nebula (1,500 light-years), the nearest stellar nursery to Earth, it would appear to cover about 30 degrees (60 full moons) on the sky. The spindly arms of the Tarantula nebula surround NGC 2070, a star cluster that contains some of the brightest, most massive stars known. Intriguing details of the nebula are visible in this scientifically-colored image. The cosmic Tarantula also lies near the site of the closest recent supernova.
Источник: apod.nasa.gov
Кадр дня: Извержение вулкана в Эфиопии
11 ноября 2008
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В Солнечной системе не так уж и много небесных тел, где зафиксирована вулканическая активность. Наша планета - в этом перечне. В рубрике "Кадр дня" NASA поместило снимок, сделанный камерами спутника Terra, на котором запечатлено извержение вулкана в Эфиопии. Особенно впечатляет шлейф дыма, который выбрасывается в атмосферу.
Источник: Nasa, Novosti-kosmonavtiki.ru
clon31, 12.11.2008 - 10:29
Кадр дня: Phoenix and the Holy Cow
12 ноября 2008
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Phoenix and the Holy Cow Image Credit: Marco Di Lorenzo, Kenneth Kremer, Phoenix Mission, NASA, JPL, UA, Max Planck Inst., Spaceflight
Explanation: The northern Martian summer is waning. As predicted, a decline in daylight hours, deteriorating weather, and dust storms are preventing solar arrays on the Phoenix Mars Lander from providing power. Phoenix's last signal was received on November 2, its successful mission ending after more than five months in the arctic region of the Red Planet, a run that exceeded its planned operational lifetime. Attempting to discover if Mars' surface has ever been able to support microbial life, Phoenix performed an extensive analysis of the soil and returned a wealth of image data. Of course, one of the lander's most exciting results was the detection of water-ice near the Martian surface. Recorded in October, this picture from the lander's Robotic Arm Camera shows the region under the Phoenix with flat, exposed icy patches. That area caused researchers to exclaim "Holy Cow!" when it was first imaged a few days after the May 25 touchdown of the Phoenix Mars Lander.
Источник: apod.nasa.gov
Кадр дня: Тунис
12 ноября 2008
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А этот снимок NASA опубликовало в рубрике "Кадр дня" как будто специально для всех, кто сейчас отправляется "погреть косточки" в Тунис. Ясное небо, чистое море, живи да радуйся.
Источник: Nasa, Novosti-kosmonavtiki.ru
clon31, 13.11.2008 - 10:36
Кадр дня: A Bubble in Cygnus
13 ноября 2008
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A Bubble in Cygnus Image Credit & Copyright: Keith Quattrocchi, Mel Helm
Explanation: Adrift in the rich star fields of the constellation Cygnus, this lovely, symmetric bubble nebula was only recently recognized and may not yet appear in astronomical catalogs. In fact, amateur astronomer Dave Jurasevich identified it as a nebula on July 6 in his images of the complex Cygnus region that included the Crescent Nebula (NGC 6888). He subsequently notified the International Astronomical Union. Only eleven days later the same object was independently identified by Mel Helm at Sierra Remote Observatories, imaged by Keith Quattrocchi and Helm, and also submitted to the IAU as a potentially unknown nebula. Their final composite image is seen here, including narrow-band image data that highlights the nebula's delicate outlines. What is the newly recognized bubble nebula? Like the Crescent Nebula itself, this cosmic bubble could be blown by winds from a massive Wolf-Rayet star, or it could be a spherically-shaped planetary nebula, a final phase in the life of a sun-like star.
Источник: apod.nasa.gov
clon31, 14.11.2008 - 17:49
Кадр дня: Fomalhaut b
14 ноября 2008
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Credit: NASA, ESA, P. Kalas, J. Graham, E. Chiang, E. Kite (Univ. California, Berkeley), M. Clampin (NASA/Goddard), M. Fitzgerald (Lawrence Livermore NL), K. Stapelfeldt, J. Krist (NASA/JPL)
Explanation: Fomalhaut (sounds like "foam-a-lot") is a bright, young, star, a short 25 light-years from planet Earth in the direction of the constellation Piscis Austrinus. In this sharp composite from the Hubble Space Telescope, Fomalhaut's surrounding ring of dusty debris is imaged in detail, with overwhelming glare from the star masked by an occulting disk in the camera's coronagraph. Astronomers now identify, the tiny point of light in the small box at the right as a planet about 3 times the mass of Jupiter orbiting 10.7 billion miles from the star (almost 14 times the Sun-Jupiter distance). Designated Fomalhaut b, the massive planet probably shapes and maintains the ring's relatively sharp inner edge, while the ring itself is likely a larger, younger analog of our own Kuiper Belt - the solar system's outer reservoir of icy bodies. The Hubble data represent the first visible-light image of a planet circling another star.
Источник: apod.nasa.gov
Кадр дня: Осень в горах Кавказа
14 ноября 2008
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Судя по всему, Кавказ "привлек" внимание специалистов NASA из-за летнего конфликта вокруг Южной Осетии. Если помните, тогда даже разгорелся небольшой скандал из-за того, что российская часть экипажа Международной космической станции оказывала "помощь" российским же военным, воевавшим с армией Грузии (а как же иначе они должны были поступить?). В следующие два месяца к этому инциденту не возвращались, хотя на Кавказе после этого еще многое что случилось. Да и сегодня этот снимок со спутника Aqua публикуется в рубрике "Кадр дня" только для того, чтобы показать, как меняется земная поверхность с приходом осени.
Источник: Nasa, Novosti-kosmonavtiki.ru
clon31, 15.11.2008 - 11:04
Кадр дня: Arp 273
15 ноября 2008
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Credit & Copyright: Adam Block, Mount Lemmon SkyCenter, University of Arizona
Explanation: The two prominent stars in the foreground of this colorful skyscape are well within our own Milky Way Galaxy. Their spiky appearance is due to diffraction in the astronomer's telescope. But the two eye-catching galaxies in view lie far beyond the Milky Way, at a distance of about 200 million light-years. Their distorted appearance is due to gravitational tides as the pair engage in close encounters. From our perspective, the bright cores of the galaxies are separated by about 80,000 light-years. Cataloged as Arp 273 (also as UGC 1810), the galaxies do look peculiar, but interacting galaxies are now understood to be common in the universe. In fact, the nearby large spiral Andromeda Galaxy is known to be some 2 million light-years away and approaching the Milky Way. Arp 273 may offer an analog of their far future encounter. Repeated galaxy encounters on a cosmic timescale can ultimately result in a merger into a single galaxy of stars.
Источник: apod.nasa.gov
Кадр дня: Шторм "Палома"
15 ноября 2008
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Дело идёт к зиме, а в тропиках всё ещё штормит. Хотя сезону ураганов давно уже пора успокоиться. На очередном снимке NASA, опубликованном в рубрике "Кадр дня", можно увидеть "крайнего" представителя ураганов 2008 года - шторм "Палома". Уже не столь "страшного", как, например, "Айк", который "закрыл" два месяца назад Космический центр имени Джонсона в Хьюстоне, но всё еще несущего большие бедствия жителям прибрежных районов бассейна Карибского моря.
Источник: Nasa, Novosti-kosmonavtiki.ru
clon31, 16.11.2008 - 12:17
Кадр дня: Anticrepuscular Rays Over Colorado
16 ноября 2008
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Credit & Copyright: John Britton
Explanation: What's happening over the horizon? Although the scene may appear somehow supernatural, nothing more unusual is occurring than a setting Sun and some well placed clouds. Pictured above are anticrepuscular rays. To understand them, start by picturing common crepuscular rays that are seen any time that sunlight pours though scattered clouds. Now although sunlight indeed travels along straight lines, the projections of these lines onto the spherical sky are great circles. Therefore, the crepuscular rays from a setting (or rising) sun will appear to re-converge on the other side of the sky. At the anti-solar point 180 degrees around from the Sun, they are referred to as anticrepuscular rays. Pictured above is a particularly striking set of anticrepuscular rays photographed in 2001 from a moving car just outside of Boulder, Colorado, USA.
Источник: apod.nasa.gov
Кадр дня: Пылевая буря над Аравийским морем
16 ноября 2008
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След от пылевой бури над Аравийским морем. Снят камерами спутника Aqua. Публикуется в рубрике NASA "Кадр дня".
Источник: Nasa, Novosti-kosmonavtiki.ru
clon31, 17.11.2008 - 10:52
Кадр дня: HR 8799: Discovery of a Multi-planet Star System
17 ноября 2008
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Credit: C. Marois et al., NRC Canada
Explanation: How common are planetary systems like our own Solar System? In the twelve years previous to 2008, over 300 candidate planetary systems have been found orbiting nearby stars. None, however, were directly imaged, few showed evidence for multiple planets, and many had a Jupiter-sized planet orbiting inside the orbit of Mercury. Last week, however, together with recent images of Fomalhaut b, the above picture was released showing one of first confirmed images of planets orbiting a distant Sun-like star. HR 8799 has a mass about 1.5 times that of our own Sun, and lies about 130 light years from the Sun -- a distance similar to many stars easily visible in the night sky. Pictured above, a 10-meter Keck telescope in Hawaii captured in infrared light three planets orbiting an artificially obscured central star. The 8-meter Gemini North telescope captured a similar image. Each planet likely contains several times the mass of Jupiter, but even the innermost planet, labelled d, orbits out near the orbit of Neptune. Although the HR 8799 planetary system has significant differences with our Solar System, it is a clear demonstration that complex planetary systems exists, systems that could conceivable contain an Earth-like planet.
Источник: apod.nasa.gov
Кадр дня: Туман у подножья Гималаев
17 ноября 2008
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Всем нам приходилось видеть туман, когда "ни зги не видно". Но вряд ли кому-нибудь из нас приходилось попадать в такой туман, который в предгорьях Гималаев увидели камеры спутника Aqua. Фотография публикуется в рубрике NASA "Кадр дня".
Источник: Nasa, Novosti-kosmonavtiki.ru
ogondush, 17.11.2008 - 13:34
Цитата | Quote(clon31 @ 17.11.2008 - 10:52)
conceivable
Цитата | Quote(clon31 @ 17.11.2008 - 10:52)
conceivable
to hr8799 Как много планетарных систем похожих на Нашу солнечную систему во вселенной? За последние 12 лет было найденно около 300 кандидатов но ничего похожего.То планеты были слишком большие то орбиты как у Меркурия. Но! На прошлой неделе нашли звезду hr8799 с планетами орбиты которых очень похожи на нашу солнечную...."Это явно демонстрирует не только... , но ивозможность существования планеты такой как Земля. (перевод в сокращении).
clon31, 18.11.2008 - 15:17
Кадр дня: First Image of the Earth from the Moon
18 ноября 2008
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Credit: NASA/LOIRP
Explanation: Pictured above is the first image ever taken of the Earth from the Moon. The image was taken in 1966 by Lunar Orbiter 1 and heralded by then-journalists as the Image of the Century. It was taken about two years before the Apollo 8 crew snapped its more famous color cousin. Recently, modern technology has allowed the recovery of higher resolution images from old data sources such as Lunar Orbiter tapes than every before. Specifically, the above image recovery was led by Nancy Evans as part of the Lunar Orbiter Image Recovery Project. Images like that above carry more than aesthetic value -- comparison to recent high definition images of the Moon enables investigations into how the Moon has been changing.
Источник: apod.nasa.gov
clon31, 19.11.2008 - 11:27
Кадр дня: Unusual Auroras Over Saturn's North Pole
19 ноября 2008
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Credit: Cassini VIMS Team, JPL, ESA, NASA
Explanation: What's causing this unusual aurora over Saturn? No one is sure. Infrared images by the robotic Cassini spacecraft of the north pole of Saturn have uncovered aurora unlike any other seen previously in our Solar System. The strange aurora are shown in blue in the above image, while the underlying clouds are shown in red. The previously recorded, also-strange hexagon cloud patterns are visible in red below the aurora. These Saturnian aurora can cover the entire pole, while auroras around Earth and Jupiter are typically confined by magnetic fields to rings surrounding the magnetic poles. More normal auroral rings had been previously imaged around Saturn. The recently imaged strange auroras above Saturn's north pole can change their global patterns significantly in only a few minutes. The large and variable nature of these auroras indicate that charged particles streaming in from the Sun are experiencing some type of magnetism above Saturn that was previously unexpected.
Источник: apod.nasa.gov
clon31, 20.11.2008 - 9:22
Кадр дня: Endeavour in the Moon
20 ноября 2008
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Credit & Copyright: Marek Kozubal, Clay Center Observatory at Dexter and Southfield Schools
Explanation: Glaring near the top of the frame, the shuttle orbiter Endeavour rockets into the night on the STS-126 mission. Endeavour left planet Earth on November 14 from Launch Pad 39A at NASA's Kennedy Space Center, making the 27th flight to the International Space Station. To record the dramatic view, the camera was placed so the shuttle's flight path tracked across the Moon, from a vantage point in Indian River City, Florida. Near picture center the almost full, perigee Moon shining through thin clouds silhouettes the shuttle's dense exhaust trail. On board the space station, the crew and the STS-126 astronauts can celebrate the orbital outpost's 10th anniversary today. Construction of the International Space Station officially began with the November 20, 1998 Russian launch of the station's first element, the bus-sized Zarya module.
Источник: apod.nasa.gov
clon31, 21.11.2008 - 11:14
Кадр дня: M76 Above and Below
21 ноября 2008
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Credit & Copyright: Don Goldman
Explanation: Also known by the popular name the "Little Dumbbell Nebula", M76 is one of the fainter objects listed in Charles Messier's 18th century Catalog of Nebulae and Star Clusters. Like its better-known namesake M27 (the Dumbbell Nebula), M76 is recognized as a planetary nebula - a gaseous shroud cast off by a dying sunlike star. The nebula itself is thought to be shaped more like a donut, its central box-like appearance due to our nearly edge-on view. Gas expanding more rapidly away from the donut hole produces the more extensive, far flung material in this remarkable image that uses narrow-band filters to highlight the emission from hydrogen (in red) and oxygen atoms (in greenish blue). In particular, complex oxygen emission features are seen above and below the main nebula to a degree not detected in most images of M76. Distance estimates place M76 about 3 to 5 thousand light-years away toward the heroic constellation Perseus, making the nebula over a light-year in diameter.
Источник: apod.nasa.gov
clon31, 22.11.2008 - 10:46
Кадр дня: From Moonrise to Sunset
21 ноября 2008
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Credit & Copyright: Miguel Claro
Explanation: In this panorama of Earth and sky recorded on Thursday, November 13, the Full Moon rises along the eastern horizon at the far left. Of course, the Full Moon rises at sunset and that Thursday's setting Sun was also captured at the far right. In between, 17 digital images are stitched together to follow the horizon to the south in a lovely twilight portrait of the city of Lisbon, Portugal. The serene view takes in part of the longest bridge in Europe, the Vasco da Gama bridge, beneath the rising Moon and ends at the mouth of the Tagus River looking west toward the sunset and the Atlantic Ocean. The photographer's vantage point was Lisbon's 100 foot high Cristo Rei monument on the south bank of the Tagus, at the foot of the port city's other famous bridge, the Ponte 25 de Abril.
Источник: apod.nasa.gov
clon31, 22.11.2008 - 20:31
Кадр дня: Eastern Aleutian Islands
22 ноября 2008
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This image of the eastern Aleutian Islands was captured by the MODIS on the Aqua satellite on November 19, 2008. The Bering Sea dominates the upper left half of the image, and the Northern Pacific Ocean dominates the bottom right half.
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Credit & Copyright: T. A. Rector (NRAO), NOAO, AURA, NSF Credit:
Explanation: Strange shapes and textures can be found in neighborhood of the Cone Nebula. The unusual shapes originate from fine interstellar dust reacting in complex ways with the energetic light and hot gas being expelled by the young stars. The brightest star on the right of the above picture is S Mon, while the region just above it has been nicknamed the Fox Fur Nebula for its color and structure. The blue glow directly surrounding S Mon results from reflection, where neighboring dust reflects light from the bright star. The orange glow that encompasses the whole region results not only from dust reflection but also emission from hydrogen gas ionized by starlight. S Mon is part of a young open cluster of stars named NGC 2264, located about 2500 light years away toward the constellation of Monoceros. The origin of the mysterious geometric Cone Nebula, visible on the far left, remains a mystery.
Источник: apod.nasa.gov
Кадр дня: Floods in Ethiopia
22 ноября 2008
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Heavy rains starting on November 2 pushed several rivers in southeastern Ethiopia over their banks. The main image, taken by the MODIS) on NASA’s Terra satellite on November 18, 2008, shows floods along the Wabe Shabele, where the impact was most severe. Compared to October 26 (which you will see if you move your mouse over the image), the river has widened.
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Data Reconstruction Credit : NASA/JPL-Caltech/UTA/UA/MSSS/ESA/DLR/JPL Solar System Visualization Project
Explanation: What created this unusual terrain on Mars? The floors of several mid-latitude craters in Hellas Basin on Mars appear unusually grooved, flat, and shallow. New radar images from the Mars Reconnaissance Orbiter bolster an exciting hypothesis: huge glaciers of buried ice. Evidence indicates that such glaciers cover an area larger than a city and extend as much as a kilometer deep. The ice would have been kept from evaporating into the thin Martian air by a covering of dirt. If true, this would indicate the largest volume of water ice outside of the Martian poles, much larger than the frozen puddles recently discovered by the Phoenix lander. Such lake-sized ice blocks located so close to the Martian equator might make a good drinking reservoir for future astronauts exploring Mars. How the glaciers originally formed remains a mystery. In the meantime, before packing up to explore Mars, please take a moment to suggest a name for NASA's next Martian rover.
Источник: apod.nasa.gov
Кадр дня: Lee Clouds in the Russian Ural Mountains
23 ноября 2008
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The MODIS on NASA’s Terra satellite captured this image which shows the movement of air and weather over the Ural Mountains in southern Russia at 12:20 pm local time on November 13, 2008. The most obvious pattern shown in the image is the influence of the mountains on precipitation, in this case, snow. A storm moving from the west bumped up against the Ural Mountains. The mountains tend to wring the moisture out of storms, and so, the western mountains are covered in snow, while the land to the east, on the lee side of the mountains, is bare.
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_www.youtube.com/v/8q3qWV4Ks3E&hl=en&fs=1
Credit & Copyright Global Television Edmonton, YouTube
Explanation: What if you're driving down the street and an object from space shoots across the sky right in front of you? Such was the case last week for many people in south central Canada. Specifically, an extremely bright fireball, presumably a desk-sized meteor from deep space, flashed across the sky just after sunset on 2008 November 20. The bright fireball was recorded on many images and movies, including the spectacular video shown above that was captured by a dashboard camera of a police cruiser in Edmonton, Alberta, Canada. Because at least two streaks appear to be visible, the falling object likely broke up into pieces as it fell deep into Earth's atmosphere. By triangulating fireball images from several simultaneously recorded sources, astronomers hope to find an approximate orbit from whence the object came, as well as the likely place(s) on Earth where large pieces would have impacted, were they to have survived reentry. In the best case scenario, pieces would be recovered from a known deep space comet or asteroid, giving humanity an unprecedented look at an ancient object that likely holds clues to the early years of our Earth and the Solar System.
Источник: apod.nasa.gov
clon31, 1.01.2009 - 11:12
Кадр дня: NGC 1569: Starburst in a Dwarf Irregular Galaxy
1 января 2009
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Credit: NASA, ESA, Hubble Heritage (STScI/AURA); Acknowledgement: A. Aloisi (STScI/ESA) et al.
Explanation: Grand spiral galaxies often seem to get all the glory, flaunting their young, bright, blue star clusters in beautiful, symmetric spiral arms. But small, irregular galaxies form stars too. In fact, as pictured here, dwarf galaxy NGC 1569 is apparently undergoing a burst of star forming activity, thought to have begun over 25 million years ago. The resulting turbulent environment is fed by supernova explosions as the cosmic detonations spew out material and trigger further star formation. Two massive star clusters - youthful counterparts to globular star clusters in our own spiral Milky Way galaxy - are seen left of center in the gorgeous Hubble Space Telescope image. The above picture spans about 8,000 light-years across NGC 1569. A mere 11 million light-years distant, this relatively close starburst galaxy offers astronomers an excellent opportunity to study stellar populations in rapidly evolving galaxies. NGC 1569 lies in the long-necked constellation Camelopardalis.
Источник: apod.nasa.gov
clon31, 1.04.2009 - 23:23
Кадр дня: In the Heart of the Tarantula Nebula
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Credit: ESA, NASA, ESO, & Danny LaCrue
Explanation: In the heart of monstrous Tarantula Nebula lies huge bubbles of energetic gas, long filaments of dark dust, and unusually massive stars. In the center of this heart, is a knot of stars so dense that it was once thought to be a single star. This star cluster, labeled as R136 or NGC 2070, is visible just above the center of the above image and home to a great number of hot young stars. The energetic light from these stars continually ionizes nebula gas, while their energetic particle wind blows bubbles and defines intricate filaments. The above representative-color picture of this great LMC nebula details its tumultuous center. The Tarantula Nebula, also known as the 30 Doradus nebula, is one of the largest star-formation regions known, and has been creating unusually strong episodes of star formation every few million years.
Источник: apod.nasa.gov
clon31, 2.04.2009 - 18:09
Кадр дня: The Seahorse of the Large Magellanic Cloud
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Credit: NASA, ESA, and M. Livio (STScI)
Explanation: It may look like a grazing seahorse, but the dark object toward the image right is actually a pillar of smoky dust about 20 light years long. The curiously-shaped dust structure occurs in our neighboring Large Magellanic Cloud, in a star forming region very near the expansive Tarantula Nebula. The energetic nebula is creating a star cluster, NGC 2074, whose center is visible just off the top of the image in the direction of the neck of the seahorse. The representative color image was taken last year by the Hubble Space Telescope's Wide Field Planetary Camera 2 in honor of Hubble's 100,000th trip around the Earth. As young stars in the cluster form, their light and winds will slowly erode the dust pillars away over the next million years.
Источник: apod.nasa.gov
clon31, 5.03.2011 - 1:23
Кадр дня: NGC 6914 Nebulae
2011 March 4
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Источник: apod.nasa.gov
clon31, 6.03.2011 - 3:30
Кадр дня: Cooling Neutron Star
2011 March 5
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Источник: apod.nasa.gov
clon31, 14.03.2011 - 23:56
Кадр дня: AE Aurigae and the Flaming Star Nebula Image Credit & Copyright: Rolf Geissinger
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