►►گالری تصاویر زیبا و بیاد ماندنی از فضا ◄◄

[alirezaghanbari]

تصویربرداری از نمایش خیره کننده بازی نورها در اتمسفر سیاره زحل به دانشمندان کمک خواهد کرد یکی از زیباترین و مرموزترین پدیده های زمینی، یعنی شفقهای شمالی و جنوبی زمین را بهتر درک کنند.به گزارش خبرگزاری مهر، اخترشناسان با کمک چشم تیزبین کاوشگر کاسینی موفق به ثبت تصاویر دقیقی از پدیده شفق بر روی سیاره زحل شده اند، تصاویری که برای اولین بار پرده از چگونگی تغییرات شدید درخشش این نورهای زیبا در طی روز بر می دارد.
با استفاده از این تصاویر فیلمی کوتاه از شفق زحلی ساخته شده است که با شفقهای شمالی و جنوبی بر روی زمین که در طی روز میزان درخشش آنها کم و زیاد می شود برابری می کند این شفق زحلی به مدت 10 ساعت و 47 دقیقه ادامه داشته است.
با مطالعه یکی از بزرگترین و فعالترین شفقهای سامانه خورشیدی، محققان امیدوارند اطلاعات جدیدی درباره چگونگی شکل گیری شفقهای شمالی و جنوبی زمینی که در قطبهای شمالی و جنوبی زمین شکل گرفته و چشم اندازهای رنگارنگی را خلق می کنند، به دست آورند.
گفته می شود ذراتی که طی فورانهای خورشیدی به فضای خارج پرتاب می شوند با گازهای باردار اتمسفر سیاره ها واکنش نشان داده و منجر به تابیدن چنین نورهای رنگارنگی می شوند اما تغییرات در شدت شفق زحلی نشان می دهد زوایه و جهت خورشید در میزان درخشانی این پدیده در طی یک روز نقشی اساسی دارد.

به گفته اخترشناسان دانشگاه لسیستر شفقهای زحلی بسیار پیچیده اند و درک تمامی عواملی که در شکل گیری آنها دخالت دارند، تازه آغاز شده است با این همه مطالعات جدید دیدگاهی وسیعتر را از ویژگی های مختلف و گسترده شفقهای زحلی به وجود آورده و می تواند عوامل کنترل کننده این تغییرات را آشکار کند.
دانشمندان بر بیش از هزار تصویر از منطقه شفقی زحل مطالعه کرده و از آنها برای ساخت فیلمی کوتاه درباره تغییرات میزان درخشش شفق زحلی استفاده کرده اند. این شفق در منطقه ای در ارتفاع 997 کیلومتری بر فراز سطح سیاره در حال درخشش است.
بر اساس گزارش تلگراف، در این فیلم تصاویر فروسرخ با رنگ آمیزی غیر واقعی نمایش داده شده اند تا تغییرات در رنگ و درخشش شفق زحلی به خوبی به چشم بیایند این فیلم نشان می دهد تغییرات در الگوی تابش شفق تحت تاثیر تغییر جهت میدان مغناطیسی سیاره متناسب با جهت ذراتی که از سوی خورشید به سوی سیاره پرتاب می شوند، قرار دارد.





منبع:

[ برای مشاهده لینک ، با نام کاربری خود وارد شوید یا ثبت نام کنید ]

[Cleeev]

The Rosette Nebula

Located about 5,000 light years from Earth, this composite image shows the Rosette star formation region. Data from the Chandra X-ray Observatory are colored red and outlined by a white line. The X-rays reveal hundreds of young stars in the central cluster and fainter clusters on either side. Optical data from the Digitized Sky Survey and the Kitt Peak National Observatory (purple, orange, green and blue) show large areas of gas and dust, including giant pillars that remain behind after intense radiation from massive stars has eroded the more diffuse gas.

A recent Chandra study of the cluster on the right side of the image, named NGC 2237, provides the first probe of the low-mass stars in this satellite cluster. Previously only 36 young stars had been discovered in NGC 2237, but the Chandra work has increased this sample to about 160 stars. The presence of several X-ray emitting stars around the pillars and the detection of an outflow -- commonly associated with very young stars -- originating from a dark area of the optical image indicates that star formation is continuing in NGC 2237. By combining these results with earlier studies, scientists conclude that the central cluster formed first, followed by expansion of the nebula, which triggered the formation of the two neighboring clusters, including NGC 2237.

Image Credit: X-ray (NASA/CXC/SAO/J. Wang et al), Optical (DSS & NOAO/AURA/NSF/KPNO 0.9-m/T. Rector et al)



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Cosmic Ice Sculptures

In the cold vacuum of space, radiation from massive stars carves away at cold molecular clouds, creating bizarre, fantasy-like structures. These pillars of cold hydrogen and dust, imaged by the Hubble Space Telescope, are located in the Carina Nebula. Violent stellar winds and powerful radiation from massive stars sculpt the surrounding nebula.

This image of dust pillars in the Carina Nebula is a composite of 2005 observations taken of the region in hydrogen light (light emitted by hydrogen atoms) along with 2010 observations taken in oxygen light (light emitted by oxygen atoms), both times with Hubble's Advanced Camera for Surveys. The immense Carina Nebula is an estimated 7,500 light-years away in the southern constellation Carina.

Image Credit: NASA, ESA, and the Hubble Heritage Project (STScI/AURA)



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A Galactic Spectacle

The Antennae galaxies, located about 62 million light years from Earth, are shown in this composite image from NASA's Great Observatories--the Chandra X-ray Observatory (blue), the Hubble Space Telescope (gold and brown), and the Spitzer Space Telescope (red). The Antennae galaxies take their name from the long antenna-like "arms," seen in wide-angle views of the system. These features were produced by tidal forces generated in the collision.

The collision, which began more than 100 million years ago and is still occurring, has triggered the formation of millions of stars in clouds of dusts and gas in the galaxies. The most massive of these young stars have already sped through their evolution in a few million years and exploded as supernovas.

Image Credits: X-ray: NASA/CXC/SAO/J.DePasquale; IR: NASA/JPL-Caltech; Optical: NASA/STScI



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Soyuz Rolls to the Pad

The Soyuz TMA-01M spacecraft is rolled out by train to the launch pad at the Baikonur Cosmodrome, Kazakhstan, Tuesday, Oct. 5, 2010. The TMA-01M is a new modified Soyuz vehicle that features upgraded avionics and a digital cockpit display. The launch of three new Expedition 25 crew members--Soyuz Commander Alexander Kaleri, NASA Flight Engineer Scott Kelly and Russian Flight Engineer Oleg Skripochka--is scheduled to launch on Thursday at 7:10 p.m. EDT.

Image Credit: NASA/Carla Cioffi


---+ It was launched on Thursday, October 7th, 2010 (last week) +---

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[Cleeev]

Decade

From 220 miles above Earth, the Expedition 25 crew aboard the International Space Station shot this night time image of the northern Gulf coast. Mobile Bay and the city of Mobile (top left, beneath one of the solar panels of a docked Russian Soyuz spacecraft), New Orleans and Houston are visible as the view moves southeastward. The Interstate Highway 20 cities of Jackson, Shreveport, Dallas and Fort Worth are also visible further inland. The view extends northward (left) to Little Rock and Oklahoma City.

Since Nov. 2, 2000, humans have lived and worked in space continuously on board the station.

Image Credit: NASA



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[hooloo202070]

سلام.من هم عضوجدیداین کانون علمی هستم.ازاین تصاویرزیباتون لذت بردم.

[Cleeev]

Where Stars Are Born

This mosaic image is the sharpest wide-angle view ever obtained of the starburst galaxy, Messier 82 (M82). The galaxy is remarkable for its bright blue disk, webs of shredded clouds and fiery-looking plumes of glowing hydrogen blasting out of its central regions.

Throughout the galaxy's center, young stars are being born 10 times faster than they are inside our entire Milky Way Galaxy, which results in a huge concentration of young stars carved into the gas and dust at the galaxy's center. The fierce galactic superwind generated from these stars compresses enough gas to make millions of more stars.

In M82, young stars are crammed into tiny but massive star clusters. These, in turn, congregate by the dozens to make the bright patches, or starburst clumps, in the central parts of M82. The clusters in the clumps can only be distinguished in the sharp Hubble images. Most of the pale, white objects sprinkled around the body of M82 that look like fuzzy stars are actually individual star clusters about 20 light-years across and contain up to a million stars.

The rapid rate of star formation in this galaxy eventually will be self-limiting. When star formation becomes too vigorous, it will consume or destroy the material needed to make more stars. The starburst then will subside, probably in a few tens of millions of years.

The observation was made in March 2006, with Hubble's Advanced Camera for Surveys' Wide Field Channel. Astronomers assembled this six-image composite mosaic by combining exposures taken with four colored filters that capture starlight from visible and infrared wavelengths, as well as the light from the glowing hydrogen filaments.

Image Credit: NASA, ESA, and The Hubble Heritage Team (STScI/AURA); Acknowledgment: J. Gallagher (University of Wisconsin), M. Mountain (STScI), and P. Puxley (National Science Foundation) z



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[Cleeev]

Sparkle

This Hubble Space Telescope image of galaxy NGC 1275 reveals the fine, thread-like filamentary structures in the gas surrounding the galaxy. The red filaments are composed of cool gas being suspended by a magnetic field, and are surrounded by the 100-million-degree Fahrenheit hot gas in the center of the Perseus galaxy cluster.

The filaments are dramatic markers of the feedback process through which energy is transferred from the central massive black hole to the surrounding gas. The filaments originate when cool gas is transported from the center of the galaxy by radio bubbles that rise in the hot interstellar gas.

At a distance of 230 million light-years, NGC 1275 is one of the closest giant elliptical galaxies and lies at the center of the Perseus cluster of galaxies.

The galaxy was photographed in July and August 2006 with Hubble's Advanced Camera for Surveys.

Image Credit: NASA, ESA, and the Hubble Heritage (STScI/AURA)-ESA/Hubble Collaboration; Acknowledgment: A. Fabian (Institute of Astronomy, University of Cambridge, UK)



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Decorating the Sky

This mosaic image taken by NASA's Wide-field Infrared Survey Explorer, or WISE, features three nebulae that are part of the giant Orion Molecular Cloud--the Flame nebula, the Horsehead nebula and NGC 2023.

Despite its name, there is no fire roaring in the Flame nebula. What makes this nebula shine is the bright blue star seen to the right of the central cloud. This star, Alnitak, is the easternmost star in Orion's belt. Wind and radiation from Alnitak blasts away electrons from the gas in the Flame nebula, causing it to become ionized and glow in visible light. The infrared glow seen by WISE is from dust warmed by Alnitak's radiation.

The famous Horsehead nebula appears in this image as a faint bump on the lower right side of the vertical dust ridge. In visible light, this nebula is easily recognizable as a dramatic silhouette in the shape of a horse's head. It is classified as a dark nebula because the dense cloud blocks out the visible light of the glowing gas behind it. WISE's infrared detectors can peer into the cloud to see the glow of the dust itself.

A third nebula, NGC 2023, can be seen as a bright circle in the lower half of the image. NGC 2023 is classified as a reflection nebula, meaning that the dust is reflecting the visible light of nearby stars. But here WISE sees the infrared glow of the warmed dust itself.

Color in this image represents specific infrared wavelengths. Blue represents light emitted at 3.4-micron wavelengths, mainly from hot stars. Relatively cooler objects, such as the dust of the nebulae, appear green and red. Green represents 4.6-micron light and red represents 12-micron light. This image was made from data collected after WISE began to run out of its supply of solid hydrogen cryogen in August 2010. Cryogen is a coolant used to make infrared detectors more sensitive. WISE mapped the entire sky by July using four infrared detectors, but during the period from August to October 2010, while the cryogen was depleting, WISE had only three detectors operational, and the 12-micron detector was less sensitive. This turned out to be a good thing in the case of this image, because the less-sensitive detector reduced the glare of the Flame portion of the nebula enough to bring out details of the rest of the nebula.

Image Credit: NASA/JPL-Caltech/UCLA



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[Bret_Hart]

با تشکر از همه

[Cleeev]

Going Supernova

While searching the skies for black holes using NASA's Spitzer Space Telescope, astronomers discovered a giant supernova that was smothered in its own dust. In this artist's rendering, an outer shell of gas and dust -- which erupted from the star hundreds of years ago -- obscures the supernova within. This event in a distant galaxy hints at one possible future for the brightest star system in our own Milky Way.

Image Credit NASA/JPL-Caltech



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The Triangulum Galaxy

The Triangulum Galaxy is located nearly 3 million light years from Earth. And, in a study that pushes the limits of observations currently possible from Earth, a team of NASA and European scientists recorded the "fingerprints" of mystery molecules in the Triangulum Galaxy, as well as the Andromeda Galaxy.

Figuring out exactly which molecules are leaving these clues, known as "diffuse interstellar bands" (DIBs), is a puzzle that initially seemed straightforward but has gone unsolved for nearly a hundred years. The answer is expected to help explain how stars, planets and life form.

Image Credit: NASA/Swift Science Team/Stefan Immler



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Seeing Red

This image by the Hubble Space Telescope shows a dramatic view of the spiral galaxy M51, dubbed the Whirlpool Galaxy. Seen in near-infrared light, most of the starlight has been removed, revealing the Whirlpool's skeletal dust structure. This new image is the sharpest view of the dense dust in M51. The narrow lanes of dust revealed by Hubble reflect the galaxy's moniker, the Whirlpool Galaxy, as if they were swirling toward the galaxy's core.

Image Credit: NASA, ESA, M. Regan and B. Whitmore (STScI), R. Chandar (University of Toledo), S. Beckwith (STScI), and the Hubble Heritage Team (STScI/AURA)



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[shabe.saket]

Decade

From 220 miles above Earth, the Expedition 25 crew aboard the International Space Station shot this night time image of the northern Gulf coast. Mobile Bay and the city of Mobile (top left, beneath one of the solar panels of a docked Russian Soyuz spacecraft), New Orleans and Houston are visible as the view moves southeastward. The Interstate Highway 20 cities of Jackson, Shreveport, Dallas and Fort Worth are also visible further inland. The view extends northward (left) to Little Rock and Oklahoma City.

Since Nov. 2, 2000, humans have lived and worked in space continuously on board the station.

Image Credit: NASA



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چقدر زیباست این عکس.
واقعا تصور اینکه این منظره رو لایو و در سکوت مطلق ببینی وسوسه کنندست.

[Cleeev]

چقدر زیباست این عکس.
واقعا تصور اینکه این منظره رو لایو و در سکوت مطلق ببینی وسوسه کنندست.

چهار تا اسپیکر قوی میزاریم دور تا دور ایستگاه فضایی یه آهنگ موتزارتم میزاریم اصلاً آخر عشق و حال دنیاس...

بیا من یه زمین تو ایستگاه فضایی خریدم بیا پیش خودم...


پ.ن.: NASA TV علاوه بر پخش زنده بسیاری از مأموریتای جاری اطراف زمین و برنامه های مختلف در مورد برنامه های دیگر سازمان هوا فضای ملی ، خیلی وقتا از این جور تصاویر به طور زنده از ایستگاه فضایی نشون میده... بگرد ویدئوهای برنامه های گذشته شاتل دیسکاوری یا سایوز رو دانلود کن تو خیلی از بخشا با دوربینای ایستگاه فضایی ، شاتل رو نشون میدن و در پس زمینه ـش اینجور تصاویر زمین واقعاً محشرن... That's our beautiful home planet ooh yeah

nasa.gov/ntv در تمام طول شبانه روز سه کانال دیجیتال Public, Education, Media فعالیت میکنن... در زمان نشون دادن زنده launch یا land یا مراحل کار یه مأموریت جاری آمریکا یا روسیه ، معمولاً هر سه کانال به صورت هماهنگ و زنده همینو نشون میدن و برنامه ها یکین...

در بخش بالا یه استریم هم پیدا میکنی Live Space Station Video که تصاویر زنده از ISS و زمین نشون میده خیلی عالیه...

سرعت اتصال اینترنتتون حداقل باید 250Kbps (کیلوبیت ~ 25-30 کیلوبایت) باشه تا اتصال ثابت بمونه و بتونید ویدئوها رو با کفیت مناسب و بدون وقفه ببینید...