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"@77parassita ecco il cultattone che interviene in difesa della ragazza....."
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"@77parassita ecco il cultattone che interviene in difesa della ragazza... O è il contrario?"
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http://www.facebo... ... ESOcast 30: First Images from the VLT Survey Te...
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http://www.facebo... ... ESOcast 30: First Images from the VLT Survey Telescope - VST and OmegaCAM start work.
This ESOcast introduces the VLT Survey Telescope (VST), the latest addition to ESO's Paranal Observatory. This new telescope has just made its first release of impressive images of the southern sky.
The VST is a state-of-the-art 2.6-metre telescope, with the huge 268-megapixel camera OmegaCAM at its heart. It is designed to map the sky both quickly and with very fine image quality.
It is a visible-light telescope that perfectly complements ESO's VISTA infrared survey telescope. New images of the Omega Nebula and the globular cluster Omega Centauri demonstrate the VST's power.
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A new telescope for mapping the skies is about to start work at ESO's Paranal Observatory in Chile. The VLT Survey Telescope, or VST, with the 268 megapixel OmegaCAM camera at its heart, is the latest addition to the observatory. It is the largest telescope in the world designed to survey the sky in visible light.
The special thing about the VST is that it has a very wide field of view — about twice as broad as the full Moon. It's dedicated to mapping the skies both very quickly and with very high image quality. The VST is housed in an enclosure right next to the VLT Unit Telescopes on the summit of Cerro Paranal under the pristine skies of one of the best observing sites on the planet.
Over the next few years the VST and its huge camera OmegaCAM will be busy making some very detailed maps of the southern skies and in this episode you'll get to see the very first released images from this brand new telescope.
The VST is a visible light telescope that perfectly complements the VISTA infrared survey telescope. The unique combination of the VST and VISTA will allow many interesting objects to be identified that can then be studied in detail with the powerful telescopes of the VLT.
The VST is a state-of-the-art 2.6-metre telescope equipped with an active optics system that keeps the two mirrors of the telescope perfectly aligned at all times in order to ensure the highest possible image quality. Now, at its core, behind huge lenses, lies the OmegaCAM camera which was built around no less than 32 CCD detectors which, together, create a whopping 268 megapixel image.
The camera also contains some extra CCDs that help with the telescope guiding and the active optics system, as well as some absolutely enormous colour filters. Both the telescope and the camera were designed to take full advantage of the excellent observing conditions on Paranal.
The VST will make three public surveys over the next five years. One survey, called KIDS, will image several regions of the sky away from the Milky Way. It will help astronomers understand more about dark matter, dark energy and galaxy evolution, and find many new galaxy clusters and high-redshift quasars. The VST ATLAS survey will cover a larger area of sky and will focus on determining the properties of dark energy. Like KIDS, it will also hunt for far-away galaxies and quasars.
The third survey, VPHAS+, will image the central plane of the Milky Way to map the structure of the Galactic disc and its star-formation history. It will yield a catalogue of around 500 million objects and will discover many new examples of unusual stars at all stages of their evolution.
The VST has just made its first release of images:
The spectacular Omega Nebula, also known as Swan Nebula, is a region of gas, dust and hot young stars that lies in the heart of the Milky Way. The VST field of view is so large that the entire nebula, including its fainter outer parts, is captured — and retains its superb sharpness cross the entire field.
Omega Centauri is the largest globular cluster in the sky. But the VST, with its very wide field of view, has no problem in capturing the whole object in a single image, including its very faint outer regions. This image contains about 300 000 stars and it highlights the impressive sharpness of the VST's images.
The combination of large field of view, excellent image quality, and the very efficient operations scheme of the VST will produce an enormous wealth of information that will advance a number of different fields of astrophysics. Many astronomers — including myself, actually — are really looking forward to the first results from the VST surveys.
Credit: ESO
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The Hidden Univers...
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The Hidden Universe of the Spitzer Space Telescope (Episode 22): The Milky Way Big Picture (Showcase).
Two and a half billion infrared pixels are exposing our own Galaxy in this new image from NASA's Spitzer Space Telescope!
This is the Hidden Universe of the Spitzer Space Telescope, exploring the mysteries of infrared astronomy with your host Dr. Robert Hurt.
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It's the Milky Way as you've never seen it before! Two and a half billion infrared pixels are exposing our own Galaxy in this new image from NASA's Spitzer Space Telescope! Science is all about getting the big picture, but some pictures are definitely bigger than others.
You may have used your computer to make a large panorama yourself by stitching together a few shots from your camera. Depending on the camera the final picture may contain ten or twenty million pixels. Now can you imagine taking over 800,000 images and combining them into a single two-and-a-half billion pixel image?
Two teams of astronomers have not only imagined it... they've used NASA's Spitzer Space Telescope to make one. And it's online for everyone to explore. Over 50 astronomers have worked on this massive project since the Spitzer mission began. This image combines data from two different legacy projects known as GLIMPSE, headed up by Dr Ed Churchwell and MIPSGAL, led by Dr. Sean Carey.
The picture covers an area of sky as wide as your finger held out at arm's length, and as long as your open arms. That's about 2 by 130 degrees. Though it sounds like a pretty small slice of the sky, it actually captures half of our entire galaxy! Our sun sits a ways out from the Galactic center, so a 130-degree arc takes in most of its area.
And our Milky Way is very thin compared to its diameter, a lot like a CD. So even a 2° wide scan includes most of its disk. The rest of the stars that fill the sky are actually very close to us, filling just a tiny fraction of the disk right around our sun.
A space image this big takes a lot of space to show off. Spitzer unveiled this giant banner, 4 feet tall and 180 feet long, at the 2008 summer meeting of the American Astronomical Society in St. Louis! Since then it's been on display at the Adler Planetarium in Chicago, and at the Griffith Observatory in Los Angeles.
The GLIMPSE part of the survey includes the shorter infrared wavelengths. At 3.6 and 4.5 microns we see blue stars that, in visible light, are completely hidden by dust. Carbon-based dust molecules show up at 8 microns, represented as green. MIPSGAL contributes the 24-micron component, rendered as red. This is the warm thermal glow from dust clouds heated by nearby stars.
Together these observations give us a pretty complete view of stellar evolution, beginning to end, across our Galaxy. These ubiquitous dark filaments are dust clouds so dense they're opaque even in the infrared. They're dense enough to trigger gravitational collapse and form new stars.
The red dots seen along these filaments are embedded protostars only barely seen at the longest, most transparent infrared wavelengths. Once the stars are fully formed and glowing from the heat of nuclear fusion, they illuminate, warm, and disrupt the surrounding dust, creating these dramatic structures near and far.
The stars eventually drift beyond their birthplaces mixing among their older cousins. This diffuse blue glow shows us the overall distribution of stars throughout the galaxy. Eventually the most massive stars die in supernova explosions. We can see their expanding shock waves rich in newly forged heavy elements that will help form the next generation of dust and stars.
The GLIMPSE-MIPSGAL image is truly a pictorial guide to the past, present, and future of stars throughout our home galaxy. Astronomers will study the data for many years to come, and the observations will be a roadmap to guide future infrared observatories.
If you'd like to explore Spitzer's Milky Way yourself, all 2.5 gigapixels are available on our website. You can download the whole thing in segments, or use one of several web viewers that let you pan and zoom through the image interactively. Take a look; you might find something that no one else has seen!
• http://www.spitze...
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IKN0SS favorited a video
(17 hours ago)
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Nuffffffffff said :D
Ciao
Questo solo perchè sono un nazista che vuole la dittatura e non permette a nessuno di dire la sua
Ma lascialo scrivere camerata e che cazzo, il sommo WATER l'ha cacciato dagli amici perchè era un doppiogiochista e io dovrei fare la sua stessa figura di paranoico? Non penso proprio