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Enciclopedia dei Pianeti Extrasolari

Enciclopedia dei Pianeti Extrasolari

http://exoplanet.eu/

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Discover an exoplanet : the transit method Unveil an extrasolar planet by observing the light intensity emitted by its mother star An extrasolar planet, or exoplanet, is a planet outside the Solar System. Until March 2012, astronomers have made detections of 762 exoplanets (see for a complete and detailed catalog). The vast majority of them has been observed through radial velocity and transit observations but other indirect methods also exist : astrometry, microlensing and timing among them.

Exoplanet Atlas full of errors – VisualJournalism When you do graphics for print in Wired – and then post on your blog about the process – stressing how much attention you pay to the details, then you’re asking for it. Sorry, David McCandless … (Click the graphic for full-size at Wired and read the blogpost at information is beautiful here) Your Exoplanet Atlas is full of errors.

"Twistor" Theory Reignites the Latest Superstring Revolution: Sc In the late 1960s the renowned University of Oxford physicist and mathematician Roger Penrose came up with a radically new way to develop a unified theory of physics. Instead of seeking to explain how particles move and interact within space and time, he proposed that space and time themselves are secondary constructs that emerge out of a deeper level of reality. But his so-called twistor theory never caught on, and conceptual problems stymied its few proponents. Like so many other attempts to unify physics, twistors were left for dead. In October 2003 Penrose dropped by the Institute for Advanced Study in Princeton, N.J., to visit Edward Witten, the doyen of today’s leading approach to unification, string theory. Expecting Witten to chastise him for having criticized string theory as a fad, Penrose was surprised to find that Witten wanted to talk about his forgotten brainchild.

Graphene High-quality graphene is strong, light, nearly transparent and an excellent conductor of heat and electricity. Its interactions with other materials and with light and its inherently two-dimensional nature produce unique properties, such as the bipolar transistor effect, ballistic transport of charges and large quantum oscillations. At the time of its isolation in 2004,[1] researchers studying carbon nanotubes were already familiar with graphene's composition, structure and properties, which had been calculated decades earlier.

50 Life Hacks to Simplify your World Life hacks are little ways to make our lives easier. These low-budget tips and trick can help you organize and de-clutter space; prolong and preserve your products; or teach you something (e.g., tie a full Windsor) that you simply did not know before. Most of these came from a great post on tumblr. 11 Com b - Visual Exoplanet Catalogue The planetary system 11 Com hosts at least one planet. Image Click on the image to get a higher resolution image.

Kepler's Exoplanets Visualized Super-Earths? Hot-Jupiters? Habitable zones, sun-like stars, Earth-like planets? What does it all mean? Sure, we all have a grasp as to what it would mean if astronomers found an exoplanet roughly the same size as the Earth, orbiting within the “Goldilocks Zone” of its parent star — i.e., it’s not too hot or too cold for liquid water to exist on the surface. When one of those bad boys are discovered, the next question would be: “Where’s the life?” Behold our dark, magnificent horror There is, you have to admit, a sort of savage grace, a tragic and terrible beauty, to the BP oil spill. Like any good apocalyptic vision of self-wrought hell, the greatest environmental disaster in U.S. history has its inherent poetry. You see that creeping ooze of black, that ungodly wall of unstoppable darkness as it slowly, inexorably invades the relatively healthy, pristine waters adjacent, and you can't help but appreciate the brutal majesty, the fantastic, reeking horror of this new manifestation of black death we have brought upon ourselves, as it spreads like a fast cancer into the liquid womb of Mother Nature herself. Really, it's not just the incredible photographs of the spill that are, in turns, heartbreaking, stunning, otherworldly and downright Satanic in their abject revulsion.

The 13 Most Important Numbers in the Universe - James D. Stein's Cosmic Numbers In the 17th century, scientists understood three phases of matter—solids, liquids and gases (the discovery of plasma, the fourth phase of matter, lay centuries in the future). Back then, solids and liquids were much harder to work with than gases because changes in solids and liquids were difficult to measure with the equipment of the time. So many experimentalists played around with gases to try to deduce fundamental physical laws. Robert Boyle was perhaps the first great experimentalist, and was responsible for what we now consider to be the essence of experimentation: vary one or more parameter, and see how other parameters change in response.

The Elements by Theodore Gray My book The Elements is based on photographs I've been collecting at my website periodictable.com for many years. The website includes not just pictures, but also more detailed descriptions than we could fit in the book, and most importantly, it includes full 360-degree rotating videos of almost all the objects. You really won't find this kind of resources anywhere else for any other subject, so please enjoy. A Newly Confirmed Planet and 42 Additional Planet Candidates « Planet Hunters Artistic rendition of a sunset viewfrom the perspective of an imagined Earth-like moon orbiting the giant planet, PH2 b. Image Credit: H. Giguere, M. Giguere/Yale University We are pleased to announce the discovery and confirmation of our second confirmed planet : PH2 b-a Jupiter-size planet in the habitable zone of a star like the Sun-by the Planet Hunter project. The paper has already been submitted to the Astrophysical Journal and has been made public via arxiv.org.

Stellar engine Stellar engines are a class of hypothetical megastructures which use a star's radiation to create usable energy. Some variants use this energy to produce thrust, and thus accelerate a star, and anything orbiting it, in a given direction. The creation of such a system would make its builders a Type-II civilization on the Kardashev scale. There are three variant classes of this idea. On the deceleration behaviour of black holes (PhysOrg.com) -- Researchers use the concept of "anti-kick" to explain why the speed suddenly decreases after the collision of such exotic objects. Kicking is not only associated with football: if two black holes approach each other so closely as to collide and merge, the resulting black hole recoils and then races through the universe at a speed of up to several thousand kilometres per second. Sometimes, however, it experiences a sudden decrease in speed - a behaviour for which there was no convincing explanation.

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