background preloader

"Did Life First Appear on Alien Worlds 12-13 Billion Years Ago?"

"Did Life First Appear on Alien Worlds 12-13 Billion Years Ago?"
This means that planets that could potentially have supported life may have formed eight, ten, maybe even twelve billion years ago. Surveys do detect a decrease in the number of planet-hosting stars with decreasing metallicity, but this drop is much shallower for terrestrial planets than it is for gas giants. Of course, the presence of some heavy elements during the planet-building phases is required, but the minimum level has not yet been determined. The raw materials for building terrestrial planets were available very soon after the Big Bang, raising the possibility that there could be life in the Universe far older than ours. Perhaps they reside around long-lived red dwarf stars, or have moved on from their home system after their star expired. Or, perhaps, we really are the first, which means that if life has happened just once throughout the entire history of the Universe, our existence must be a fluke and our planet very, very special indeed. Journal reference: Nature Related:  Planets15

Giant System of Exo-Planets Discovered Orbiting a Young Star By measuring the density of dust in the densest part of the ring, the astronomers found that it is highly possible that Jupiter-like giant gaseous planets or Earth-like rocky planets are now being formed in that region. This region is far from the central star, about 5 times larger than the distance between the Sun and the Neptune. This is the first firm evidence of planet formation found so far from the central star in a protoplanetary disk. The research team plans further observations of HD142527 with ALMA for closer investigation, as well as other protoplanetary disks to have a comprehensive understanding of the planet formation in general. More than 1000 extrasolar planets have been discovered until now, and it is widely recognized that the Sun is not the only star which has planets. An infant star is surrounded by a ring of dust and gas, which would be the component material of planets. Spiral or gap structures are thought to be associated with hidden planets in the disk.

Brasileirão 2015 ao vivo, resultados Futebol Brasil - Resultados.com Seu navegador é muito antigo. Algumas partes do site podem não funcionar corretamente. Por favor atualize o seu navegador para garantir a exibição correta do site. Nós recomendamos: Chrome | Firefox | Explorer | Opera | Safari results fixtures Best Photo Yet of An Exoplanet It's just a few small pixels, but the image above marks a giant leap for our capacity to explore worlds beyond the influence of the sun. Taken with the Gemini Planet Imager, recently fitted to the Gemini South telescope in Chile, the bright dot represents Beta Pictoris b, one of the most famous planets beyond the solar system. The larger circle, looking like the freeze frame of a drop of water after it has landed on a pond, is centred on the star Beta Pictoris itself, after its light was subtracted so that it would not overwhelm the planet itself. The Planet Imager was specifically designed for such work, with “Advanced adaptive optics, diffraction control, a near-infrared spectrograph, and an imaging polarimeter” according to the team that took this image. The twenty one institutions that came together to make the image possible hailed the photo as “an order of magnitude better than conventional adaptive optics imagers” . Future targets will be harder, however. Photo Gallery

The Ultimate List of Free Content Creation Tools & Resources Creating content isn't always a walk in the park. (In fact, it can sometimes feel more like a sprint in a swamp.) While other parts of business and marketing are becoming increasingly automated, content creation is still a very manual job. That being said, there are plenty of tools out there to make creating content much easier. Click here to download our full collection of content creation templates for blog posts, ebooks, infographics, and more. Below, you'll find a list of 28 fantastic tools and resources to help you research, write, edit, and design content more easily. Let's get started. 28 Free Tools & Resources to Make Content Creation Easier For Researchers 1) Google Drive Research Tool Google recently added a tool to Drive that allows you to conduct Google searches without ever leaving your Drive window. 2) Site:search This is a handy Google hack I use every day. 3) Google Webmaster Tools Doing SEO and keyword research? 4) Percentage Change Calculator 5) Search in a Giphy For Writers

Transiting Exoplanet With Longest Year Discovered Astronomers have identified an exoplanet that has the longest year ever discovered outside of our solar system at 704 days. The research was lead by David Kipping of the Harvard-Smithsonian Center for Astrophysics and has been accepted for publication in The Astrophysical Journal. Kepler-421b is about 1,000 light-years away in the constellation Lyra. It is about the same size as Uranus and exists over 177 million km away from its orange K-type parent star, taking 704 days to complete a single orbit. Exoplanets are typically identified when they transit their parent star, blocking out some of the light. The planet was spotted with NASA’s Kepler telescope. "Finding Kepler-421b was a stroke of luck," Kipping explained in a press release. Kepler-421b’s position is also helping to explain some aspects of planetary formation. "The snow line is a crucial distance in planet formation theory.

HTG Explains: The Difference Between WEP, WPA, and WPA2 Wireless Encryption (and Why It Matters) Even if you know you need to secure your Wi-Fi network (and have already done so), you probably find all the encryption acronyms a little bit puzzling. Read on as we highlight the differences between encryption standards like WEP, WPA, and WPA2–and why it matters which acronym you slap on your home Wi-Fi network. What Does It Matter? You did what you were told to do, you logged into your router after you purchased it and plugged it in for the first time, and set a password. WEP, WPA, and WPA2: Wi-Fi Security Through the Ages Since the late 1990s, Wi-Fi security algorithms have undergone multiple upgrades with outright depreciation of older algorithms and significant revision to newer algorithms. Wired Equivalent Privacy (WEP) Wired Equivalent Privacy (WEP) is the most widely used Wi-Fi security algorithm in the world. WEP was ratified as a Wi-Fi security standard in September of 1999. Wi-Fi Protected Access (WPA) Wi-Fi Protected Access II (WPA2) Wi-Fi Security History Acquired; Now What?

Scientists Find Strong Evidence That the Earth Was Hit Head-On by a Mars-Sized Planet The early solar system was, for lack of a better term, a chaotic hellscape. Everything we see today, from Mercury on out to the inner Oort Cloud, was a product of a series of collisions that accumulated into moons, asteroids, and planets. And perhaps one of the most violent blows came when a planet roughly the size of Mars smashed into a fledging planet called Earth. At the end of the cataclysmic event, two bodies were left standing: Earth itself, and a fragmentary, molten piece of the two planets that coalesced into the Moon. Advertisement - Continue Reading Below But there's been a debate in the planetary science community: Did that early small planet, Theia, side-swipe the Earth, or did it run into it full-on? But recent analysis of material taken from the Apollo 12, 15, and 17 missions tells a different tale: that of a violent head-on collision, one that left the Earth forever scarred with the fragments of Theia, and that left the Moon with the same ratios of material.

Ki a legjobb? - Messi, Neymar, Ronaldo :: Caioli, Luca Luca Caioli, Messi, Ronaldo és Neymar életrajzának szerzője most azt a kérdést teszi fel: Ki hármuk közül a legnagyobb? Erősen különböző stílusuk, történeteik, mutatóik, díjaik összehasonlításával minden segítséget megad a döntéshez: melyikük kerül ki győztesen ebből a versenyből? Barátokkal, családtagokkal, csapattársakkal és edzőkkel folytatott exkluzív beszélgetések - többek között a Luiz Felipe Scolarival és Vicente del Bosquével készített interjúk - segítségével Caioli sajátos bepillantást ad abba, mi tesz egy modern futballistát nem csak sikeressé, igazán naggyá. Nyelv : magyarÁfa kulcs : 5%EAN : 9789636899400ISBN : 9636899400Megjelenés : 2015.5.20.Kötésmód : cérnafűzött kötöttOldalszám : 172Méret [mm] : 0 x 0 x 0Tömeg [g] : 200Raktári kód : 741811Regisztrálás : 2015.04.27.Link :

New Planet System Found—May Have Hidden "Super Earth" A newly discovered planetary system orbiting a sunlike star may conceal a rare super- Earth , according to data from NASA's Kepler space telescope . Launched last March, Kepler was designed to look for extrasolar planets, aka exoplanets, via transits—the periodic dimming of light from stars due to planets passing in front them, as seen from the telescope's vantage point. (Read about Kepler's first planet discoveries .) After analyzing seven months' worth of data from Kepler, a team led by Matt Holman of the Harvard-Smithsonian Center for Astrophysics found two transiting exoplanets orbiting the star Kepler-9, which lies about 2,300 light-years from Earth. One of the planets, dubbed Kepler-9b, takes just over 19 days to orbit its star. The researchers noticed that both planets' orbital periods speed up and slow down at regular intervals. Using that data, the scientists were able to calculate the masses of the planets, and they found that both worlds are slightly less massive than Saturn .

Football Association of Ireland Official Website

Related: