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"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

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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. Brasileirão 2015 ao vivo, resultados Futebol Brasil - 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.

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 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. Automation hasn't yet replaced what we do (thank goodness). 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. 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.

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? 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.

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.

New Planet Found in Our Solar System? Richard A. Lovett in Timberline Lodge, Oregon Too far out to be easily spotted by telescopes, the potential unseen planet appears to be making its presence felt by disturbing the orbits of so-called Kuiper belt objects, said Rodney Gomes, an astronomer at the National Observatory of Brazil in Rio de Janeiro. Kuiper belt objects are small icy bodies—including some dwarf planets —that lie beyond the orbit of Neptune . Once considered the ninth planet in our system, the dwarf planet Pluto, for example, is one of the largest Kuiper belt objects, at about 1,400 miles (2,300 kilometers) wide. Do other planets have an effect in Earth's rotation and revolution? Yes they do, and this is a great way to introduce perturbation theory. Exact solutions to n-body problems where n is greater than 2 are hard to find. It has been accomplished in the case of 3 and 4 bodies, and a general solution where bodies do not collide has also been found, but these problems are extremely complex.