1. Artist impression of the protoplanetary disc surrounding the young star MWC 480

    00:56

    from ESO Observatory / Added

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    Artist impression of the protoplanetary disc surrounding the young star MWC 480. ALMA has detected the complex organic molecule methyl cyanide in the outer reaches of the disc in the region where comets are believed to form. This is another indication that complex organic chemistry, and potentially the conditions necessary for life, is universal. More information and download options: http://www.eso.org/public/videos/eso1513a/ Credit: B. Saxton (NRAO/AUI/NSF). Music: Johan B. Monell (www.johanmonell.com)

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    • A NEW THEORY ABOUT THE FORMATION OF THE SOLAR SYSTEM

      01:54

      from kcasotti / Added

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      Abstract Objective – To demonstrate that the appearance of the Solar System might have been originated from a collision between a gigantic Centaur and the Sun; and to provide the scientific world a new theoretical hypothesis about the origin of the Solar System, which may rival the current theory of the Solar Nebula. Introduction – To better explain this New Theory, the introduction was divided into topics, reporting a buscagave rise to the Solar System. 1- THE SUN – In the New Theory for the Formation of the Solar System scenario, the Sun has always been in the same place and with the same magnitude. 2- THE GIANT CENTAUR – In the beginning of the universe, amid orbits and movements of celestial bodies, a Giant Centaur with approximately 70 earth masses (here called as Mother Centaur) comes out traveling over a route towards the Sun. It was composed of a mix of everything that exists orbiting the Sun, except hydrogen and helium. The surface was mostly water, similar to the Oort cloud. Under that surface there was a mixture of water and rocks, with density lower than 0,6g/cm3, equal to current comets. Deepening even further, the density got to 2,5g/cm3, similar to asteroids and centaurs. Finally, a rocky core, with density greater than 5,5g/cm3, that resembled current rocky planets. 3- THE COLLISION - As the Centaur gets closer, it performs a semicircle around the Sun before colliding with it, glancing, creating a great explosion. The Centaur, which was already being fragmented as it got closer, it fragments even more taking with it other components from the Sun (Helium and Hydrogen). Knowing that the centaurs’ tail occurs on its dark side and not facing the Sun, it is supposed that the Mother Centaur got this approach without melting because its comma formed a gigantic shield around itself throughout the volatile material, minimizing solar heat. In contact between extreme temperatures of a centaur close to absolute zero with the Sun close to 5500 ºC, it might have happened a monumental explosion which gave rise to the Solar System (The quantity of water of the Centaur is one of the most important aspect of this impact, in order to simulate it in a computer). 4- PROTOPLANETARY DISK – A Protoplanetary Disk, rotating around the Sun, was formed from those billions of Centaur’s fragments launched into space along with the material (He + H) taken from the Sun. 5- PLANETS – In this collision, at least 8 big incandescent fragments from the Centaur core were launched and gave rise to the 8 planets of the Solar System. Without gravity, they earned spherical shape. They also aligned themselves in a sequence around the Sun where the first four (Mercury, Venus, Earth and Mars) are rocky, formed by the Mother Centaur’s core. The last four (Jupiter, Saturn, Uranus and Neptune) are gaseous and have rocky core surrounded by gases coming from the Sun (Helium and Hydrogen) and from the centaur (NH3, H2O, CH4). Hence the chemical similarity of Jupiter to the Sun. Uranus and Neptune, for being farther, received less H and He, and more NH3, H2O and CH4. 6- KUIPER BELT – It had its origin from the tail and bigger fragments which detached from the Mother Centaur while performing the semicircle on its approaching path to the Sun. 7- OORT CLOUD – The Oort Cloud also had its origin from the centaur’s tail formed at the moments before the collision. It might have been formed while the centaur performed the approaching path around the Sun. The gas and dust tail’s material would have been driven by the solar winds to the limits of the Solar System, which was at the beginning pure emptiness, with no other material. Conclusion – The New Theory of the Formation of the Solar System is a hypothesis formulated from existing information about the universe and published by the scientific community, making, however, new correlations between them. If considered throughout scientific means, it could give a new version to the origin of the Solar System. Among the original explanations that this New Theory presents are: • It explains why the Solar System has a Disk shape and all Planets rotate in the same direction. • It explains the Sun’s shortest angular momentum compared to planets. • It explains why all Planets have spherical shape while comets are shapeless. • It explains the origin of Comets, Asteroids and Centaurs from our Solar System. • It explains why Jupiter and Saturn have chemical constitution similar to the Sun’s. • It explains why the Earth has been merged in its origins. • It explains how the Kuiper Belt was formed. • It explains how the Oort cloud was formed. • It explains how a Centaur with 70 earth masses managed to form planets that totalize more than 447 earth masses.

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      • Science Bulletins: Sun-Like Star May Host Several Planets

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        from AMNH / Added

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        A telescope searching for interplanetary systems has detected a large gap in the dust disk around a young star, which could indicate the presence of multiple planets. The star is similar in size to our own Sun. Studying early-stage extrasolar planets and their host stars helps scientists to understand the formation of solar systems—including our own. Science Bulletins is a production of the National Center for Science Literacy, Education, and Technology (NCSLET), part of the Department of Education at the American Museum of Natural History. RELATED LINKS Polarimetric Imaging of Large Cavity Structures in the Transitional Disk around PDS 70 http://science.gsfc.nasa.gov/667/conferences/talks/ncad_2012/NCAD_Hashimoto.pdf The Structure of Pre-transitional Protoplanetary Disks I: Radiative Transfer Modeling of the Disk+Cavity in the PDS 70 System http://arxiv.org/pdf/1209.3772v2.pdf National Astronomical Observatory of Japan http://www.nao.ac.jp/E/ Subaru Telescope http://www.naoj.org/ Princeton University: High Contrast Imaging Laboratory http://www.princeton.edu/~hcil/projects.html

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        • Protoplanetary Disk

          02:25

          from MrSpaceartist / Added

          285 Plays / / 0 Comments

          The dust disk of our emerging solar system, the protoplanetary disk. It was a rotating circumstellar disk of gas and dust surrounding the newly formed sun, 4.6 billion years ago! Digital, PhotoshopCS, Lightwave3D. Dimension: 10000 x 7500 px, 300 dpi. Find the painting on my weblog! Protoplanetary disk: http://www.ralf-schoofs.de/blog/2009/08/protoplanetare-scheibe-2-0/ Music: "Das Observatorium" by Stephen Parsick from his CD "Höllenengel". With friendly permission by Stephen Parsik. Listen to his music on iapetus-store.com/album/hoellenengel Copyright by Ralf Schoofs and Stephen Parsick !

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