1. Sunday Science - Intro to Exoplanets


    from Friends of the Planetarium / Added

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    Raphael Perrino provides a brief introduction to the subject of exoplanets. Recorded in April, 2011.

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    • The Exoplanet Transit Method - The Method - Part 2 of 2


      from Paul Anthony Wilson / Added

      PART 2: The transit method is only one of many methods astronomers use to discover an exoplanet. The orbit of an exoplanet may vary a lot, in terms of orbital distance and inclination. A transiting exoplanet Is a planet which passes infront of the hoststar as seen from Earth. When this happens a portion of the light from the star is blocked out and a decrease in the number of photons is measured. Measuring the photon number or photon flux over time allows astronomers to make what is known as a light curve. It is this light curve with it's characteristic shape and depth which lets astronomers characterise the exoplanet and in some cases its atmosphere. It is truly remarkable that from observations of an unresolved point of light astronomers are able to infer precise values for the properties of the star-planet system. Assuming the star is of uniform brightness, the change in flux will depend on both the radius of the exoplanet, and the radius of the star. If the radius of the host star is known, one also knows the radius of the planet. For this to work we assume the exoplanet system is viewed from an interstellar distance so great that the distance to the exoplanet or host star can be considered equal. Astronomers can estimate the inclination of the exoplanet orbit depending on how the exoplanet crosses the host star. From a method known as the Radial velocity method, one has an expression for what is known as the minimum mass. Knowing the inclination of the exoplanet orbit and knowing the minimum mass, one can calculate the mass of the exoplanet itself, assuming the stellar mass is known. Having an estimate of both the radius and the mass of the exoplanet, one can easily calculate the average density. With an average density astronomers can estimate what sort of planet it is. If the planet is a gasseous planet like saturn or jupiter or rocky like our own earth.

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      • The Exoplanet Transit Method - Introduction - Part 1 of 2


        from Paul Anthony Wilson / Added

        PART 1: The Universe is such a vast place that it is beyond the capability of mankind to understand it's true extent. The fact that there are on the order of 100 billion galaxies out there, each containing close to 100 billion stars is a mindboggling thought. Our star, the Sun, has 8 planets that orbit around it. This observation has naturally lead mankind to wonder how many other stars out there in the vast universe might also have planets orbiting around them. Although a relatively old question, it was not until 1995 (Mayor & Queloz 1995) that astronomers first discovered evidence of a new planet, orbiting a sun like star, outside of our solar system. Since then astronomers have discovered loads other planets. These planets outside our solar system, referred to as extra-solar planets or in short exoplanets, have been detected using many different methods. One of the main techniques, which will be covered in the next film, is the transit method.

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        • ScienceCasts: Weird Planets


          from Science@NASA / Added

          248 Plays / / 0 Comments

          Visit http://science.nasa.gov/ for more. Once, astronomers thought planets couldn't form around binary stars. Now Kepler has found a whole system of planets orbiting a double star. This finding shows that planetary systems are weirder and more abundant than previously thought.

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          • Lifeless Planet PAX Gameplay Trailer


            from David Board / Added

            37K Plays / / 0 Comments

            The new trailer for Lifeless Planet featuring pre-alpha gameplay and music from the game by composer Rich Douglas. An astronaut seeking life on a distant Earth-like planet finds the world is a barren wasteland. When he discovers an abandoned Russian town he believes his mission was a hoax until a mysterious woman saves him from a strange and deadly phenomenon... Learn more about the project at LifelessPlanet.com

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            • One way voyage to the edge of the known universe


              from Salar Golestanian / Added

              1,542 Plays / / 0 Comments

              The animation is built with images taken from the Hubble telescope, as well as the material provided with many thanks from their official sites acknowledged below. The Voyage to the Edge of the Universe is science fantasy a journey that explores the science and history behind some of the distant celestial bodies in the galaxies near and far. Whilst made with great care to ensure authenticity of the cosmological and physical laws, but a little Sci-Fi Genre is also added. This remarkable, epic voyage across the space and time, takes us from the Earth, past the planets in our solar system like Saturn and our neighbouring planets, out of our Solar System, to the nearest stars, nebulae and galaxies black holes and beyond. For the ship proportion we are using a new approach to generate a Wormhole in number of steps all the way to the edge of the Universe. The Story This video is more fiction than science and in it is journey through the universe is as if you are watching a Sci-Fi adventure. In part two of this series, I will be talking more about the science of the ship that could make this journey possible. The ship is just a big space telescope that is surrounded by impenetrable egg shaped shell that is made of a thin atomic size membrane that builds the Higgs Filed. This shell is solid and is completely made up of subatomic with no space between the nuclides so the strong force can protect it and the Higgs field can make the whole space around the egg-ship seem massless and therefore invisible to our reference frame. This egg-ship therefore behaves like neutrinos and is able to travel through solid matter and be unaffected by matter scattered in its path to the edge of the universe. The field protects the telescope by making it massless. It is therefore invisible to our reference frame and yet only photons can penetrate the shell and therefore can see its surrounding space. It enters number of small black-holes to enable it to travel at incredible speeds to the edge of the universe in about 11 minutes duration of the video. This is a one way voyage as it reaches the edge of the universe where laws of physics breaks down -- so does its ability to send signals back to earth. Our Egg-Ship and the science of wormholes: Whilst we all consider the black hole as a black enormously heavy object -- in my view the blackness is purely seen from our earthly reference frame, since no light is given off from the black hole. Therefore, the wormhole/black-hole is completely black and invisible from our reference frame -- and yet, when the ship enters the event horizon and is sucked inside, to the observer inside the egg ship will see the world as white. This is because the noise level is extreme and therefore everything will be seen as white. There on in a blink of an eye the egg-ship moves great distances thought he space and time of our cosmos and then when it comes out the other side, our egg ship has covered another few billion light years to a new exciting place to encounter more wonders of the cosmos. • The eye on the universe is by Deep Impact Spacecraft • Telescope's mirror is used both to observe and transmit finding back to earth • Formation of a ring around an extrasolar planet • vampire star and Crab Supernova Explosion • red supergiant supernova progenitor star exploding • Star-forming region S 106 • exoplanet, Fomalhaut b, orbiting its sun, Fomalhaut. Acknowledgements: Space for Europe: esa.int Nasa Multimedia: nasa.gov Music: Pavane pour une infante défunte - http://salaro.com/537.re Web: salaro.com Product: dotnetnuke.co.uk Blog: salargolestanian.com SciFi: scifiwood.com About Salar: Salar's main business is at salaro.com & with team of 12, builds maintains software solutions based on Microsoft .net for both CMS and Ecommerce Platforms, DotnetNuke and nopCommerce. Forthe latest news you can visit the respective sites above. Salar's early academic years was doing Physics so he has a good understanding of the Science & Technology in particular Physics & Mathematics. The web world today, moves and progresses swiftly, so I hope to keep a continuous flow of work related information and ideas in my subsequent blogs or Salaro TV

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              • Astronomy Talk: Transits of Venus from Earth, Jupiter & Saturn, Past, Present & Future


                from Keck Observatory / Added

                The June 5, 2012, Transit of Venus was a rare event, not to be witnessed again by anyone alive today. But there are other Venus transits, elsewhere, and Professor Pasachoff takes us on a journey through time and space to see them as well as shows the brand new science observations from the June 5 event.

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                • Exoplanets – The Reality


                  from Edward Bell / Added

                  4,527 Plays / / 1 Comment

                  Two years ago, when I did this short film, more than 400 new planets had been discovered. Since then, the number has doubled. A handful of them seem to have water, and as such, the possibility of life. But when and how can we ever cross the vast gulf of space that separates Earth from these strange new worlds? The challenge is staggering. This short video essay, which I've written and edited and narrated, uses animation from NASA and illustrations from artist Ron Miller to disclose these difficulties, and suggests some possible solutions.

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                  • From Hot Jupiters to Habitable Planets, Part 2


                    from Keck Observatory / Added

                    Dr. Debra Fischer, Yale University, explains the lively science of planet hunting. This talk was delivered on Feb. 27, 2012, under balmy Hawaiian night skies at The Fairmont Orchid on the Big Island of Hawai'i to an enthusiastic audience of Friends of the W. M. Keck Observatory.

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                    • From Hot Jupiters to Habitable Planets, Part 1


                      from Keck Observatory / Added

                      Dr. Debra Fischer, Yale University, explains the lively science of planet hunting. This talk was delivered on Feb. 27, 2012, under balmy Hawaiian night skies at The Fairmont Orchid on the Big Island of Hawai'i to an enthusiastic audience of Friends of the W. M. Keck Observatory.

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