Astronomy Picture of the Day . ... Fliers Around the Blue Snowball Nebula . ... Planetary nebulae are strange. ... Next, although hundreds of planetary nebulae have been catalogued and thousands surely exist in our Galaxy, aspects of the formation process are still debated. The Blue Snowball Planetary Nebula . ... The Blue Snowball is a planetary nebula - and in 5 billion years the Sun will throw off its outer layers and go through a planetary nebula phase. ... Fractal Interstellar Dust Up-Close . ...

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Astronotes Armagh Planetarium's Stellar Blog! ... Solar System . ... Planets . ... This bizarrely shrunken planetary system was found by NASAтАЩs Kepler mission, hence the parent star has been named Kepler-11. ... Planetary scientist and Kepler science team member Jack Lissauer said ?These six planets are mixtures of rock and gases, possibly including water.тАЭ €аNone of these strange new worlds are likely to be home to any form of life; their surface conditions are simply too extreme. ...

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• Kepler-10c: the First Mega-Earth | Astronotes
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3) Planets and Brown Dwarfs . ... By its nature, this method is most sensitive to massive planets orbiting close to their stars. ... That means that some of the more massive extrasolar planets could actually be brown dwarfs (although the statistics of the finds suggest that most of them are not). ... Another possible difference between brown dwarfs and massive planets is how they are born. ... They would base the fundamental definition on the mode of formation: a planet is built from planetesimals. ...

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• ASP: The Music of the New Spheres?
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My research efforts have focused on three areas which are: . More than 200 extrasolar planets have been discovered around relatively nearby stars, primarily through the Doppler line shifts owing to the reflex motions of their host stars, and more recently through transits of some planets across the face of the host stars. ... Gravitational microlensing provides a novel technique to look for planets around lens stars, and this is the only technique currently capable of detecting Earth-mass planets. ...

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• HST this week
• ST ScI Preprint #1390
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N-BODY SIMULATIONS OF PLANET FORMATION: VARYING THE NUMBER OF PLANETARY EMBRYOS J.E. CHAMBERS Armagh Observatory, College Hill, Armagh, Northern Ireland, BT61 9DG, UK. ... These gained mass until they became large enough to gravitationally per- turb other objects in the nebula. ... Their simulations started with a few tens of planetary embryos, moving on circular nearly-coplanar orbits in the region now occupied by the terrestrial planets. ... Rev. Earth Planet. ... 4 J.E. CHAMBERS Figure 2. ...

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• Extrasolar Planetary Systems: More Like Ours - by David Perez-Suarez, Armagh
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• Astrodynamics 101

On the inclination of planetary orbits! Caroline Terquem! ... Planets on inclined orbits Higher inclinations for planets around stars with Teff>6250K? Planet formation, Hot Jupiters and misalignments 1. If planets form by the core accretion scenario and migrate in: Hot Jupiters But no eccentricity and no misalignment (if the disc is in the star's equatorial plane) With further planet/planet scattering and/or Kozai cycles: Eccentricity and misalignment But companions required.. ...

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• http://www.mrao.cam.ac.uk/wp-content/uploads/2014/04/GColeman.pdf
• http://www.mrao.cam.ac.uk/wp-content/uploads/2014/04/AMustill.pdf
• Astrophysics Group Research and Instrumentation

... Many massive planets contrary to Jupiter have large eccentricities of orbits. ... Another problem is to study the conditions and boundaries of stable, regular motions of small mass planet in systems having `Jupiter' with large orbital eccentricity as well as properties of regular, stable, and irregular, chaotic motions. ... The regular eccentricity evolution described above demonstrates that stable quasi--circular orbits of small planet are unusual. ...

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• Values of asteroid masses
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... More on 51 Peg: . The discovery of a Jupiter--mass planet in orbit around the solar--type star 51Peg has been reported by Michel Mayor and Didier Queloz (Geneva Observatory) on October 6th at the 9th Cambridge workshop on "cool stars, stellar systems, and the sun" held at Florence (Italy). ... Recall that the measurements of radial velocity only yield v sin i which in turn gives us M sin i. For most values of i, sin i will be greater than 0.5 and this gives a mass estimate of 0.5 Jupiter masses. ...

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• All about Jupiter
• The Three Planet System
• Planetary Formation

... 2007 June 19 . Eris: More Massive than Pluto . ... Explanation: Eris , a dwarf planet currently orbiting the Sun at about twice Pluto's distance, has been measured to have about 27 percent more mass than Pluto. The mass was calculated by timing the orbit of Eris' moon Dysnomia . Images taken with a ground-based Keck telescope , when combined with existing images taken by Hubble Space Telescope , show that Dysnomia has a nearly circular orbit lasting about 16 days. ... About APOD | ...

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• APOD: 2009 June 3 - VB 10: A Large Planet Orbiting a Small Star
• APOD: November 15, 1996 - Searching For Solar Systems
• APOD: June 26, 1998 - A Planet For Gliese 876

... Since planets are expected to form out of the material in disks around young stars, the formation of a planet will thoroughly alter the structure of the circumstellar disk of their host star, forming significant gaps in the radial distribution of matter around the star. Additionally, processing of solids (annealing/crystallization) and changes in the overall gas/dust ratio are thought to happen during the planet formation process and are believed to alter the observational signature of the disk. ...

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• Exoplanet Caught on the Move | ESO
• ESO - PhD Thesis Topics offered by ESO Faculty Members
• ESO - Star and Planet Formation Workshop

Saturn: The beauty of the rings. Saturn . ... Belongs to the giant planets . It has no definite solid surface. ... The free fall acceleration at the Saturn surface near equator is 9,06 m/s^2 . ... In the centre of the planet the temperature is about 20000K. The satellites . ... The rings of Saturn . ... It is proved that Saturn's rings (as well as the other planet's) are the fragments of the great cloud being near the planet with million kilometres length (see how the rings were formed ). ...

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• jupitere
• urane
• earthe

... Neptune is smaller in diameter but larger in mass than Uranus . ... N eptune has been visited by only one spacecraft, Voyager 2 on Aug 25 1989. ... A t the time of the Voyager encounter, Neptune's most prominent feature was the Great Dark Spot (left) in the southern hemisphere. ... Neptune's winds blew the Great Dark Spot westward at 300 meters/second (700 mph). ... L ike Uranus and Jupiter, Neptune's rings are very dark but their composition is unknown. ... Neptune's Ring System . ... Uranus .. ...

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• Uranus
• Europa
• Mercury

Class 1 Introduction, Background History of Modern Astronomy The Night Sky, Eclipses and the Seasons Kepler's Laws Newtonian Gravity General Relativity Matter and Light Telescopes Class 2 Solar System Characteristics Formation Exosolar Planets Class 3 Stars The Sun Stellar Evolution of Low and High Mass Stars Deaths of Stars Exotic Stars Class 4 Galaxies Galaxy Classification Formation of Galaxies Galactic Evolution ... So far, one planet has been studied by this method. ...

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• http://www.aaa.org/s932/images/09fallclass3.pdf

... Tonight's Sky . ... The Magazine . ... Star Atlas . ... An artificial comet holds secrets to Earths life . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... The planet has extreme temperature swings and perhaps active lava flows. ... A digital supplement to Astronomy magazine. ... Join TravelQuest International with Astronomy and Discover magazines on one of three great tour options surrounding this celestial spectacle . ... Astronomy Magazine . ...

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• Planets, orbits, and comets are somewhat round. Is there an underlying
• New observations of the giant planet orbiting Beta Pictoris | Astronomy.com
• NASAт??s SOFIA finds missing link between supernovae and planet formation |

Modelling Protostellar Disks Sarah Maddison Centre for Astrophysics and Supercomputing Swinburne University Overview · Types of circumstellar disks : ­ protostellar disks ­ circumbinary disks ­ protoplanetary disks · Modelling disk - important parameters: ­ Mdisk, Rdisk, H(r), i, T(r,z), (r,z)... ­ grain properties Introduction to PS Disks · Disks are a natural by- product of star formation process · Indirect evidence for ... Fuor and Xor outburst) convection in accretion disks? ...

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• OH_masers Category
• ATNF Colloquium
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... galaxies: bulges galaxies: clusters: general galaxies: clusters: individual: . ... star formation statistics stellar content structure Cosmology ( cosmology :) cosmic background radiation ( cosmology :) cosmological parameters cosmology : miscellaneous cosmology : observations cosmology : theory ( cosmology :) dark ages, reionization, first stars ( cosmology :) dark energy ( cosmology :) dark matter ( cosmology :) diffuse radiation ( cosmology :) distance scale ( cosmology :) early Universe (...

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• Galaxy sector, archive 2007

... This talk will present discoveries of new transiting planets and low mass stars, and the characterisation of their fundamental properties: mass, radius, temperature, and composition. ... The planets discovered by HATSouth orbit a diverse range of host stars, and the candidates identified have a wide range of orbital periods. ... These observations represent some of the highest precision near-infrared time-series photometry performed from the ground, and probe a diverse range of planet atmospheres. ...

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• Mass Feeding and Feedback in Young Stellar Objects
• IAU Commission #34 (Interstellar Matter)
• Home Page of Raquel Salmeron

arxiv:1011.4994 Поиск южных экзопланет на HARPS. ... Authors: C. Lovis et al. arxiv:1011.4918 Изображение четвертой планеты вокруг HR 8799 (Images of a fourth planet orbiting HR 8799) . ... Authors: Kevin Schawinski et al. популярный обзор arxiv:1011.3532 Момент истины для темного вещества из WIMP (The moment of truth for WIMP Dark Matter) . Authors: Gianfranco Bertone . миниобзор arxiv:1011.2801 Гамма-лучи от темного вещества (Gamma rays from dark matter) . Authors: Torsten Bringmann . ...

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• http://xray.sai.msu.ru/~polar/sci_rev/1407.html
• http://xray.sai.msu.ru/~polar/sci_rev/0906.html
• Астрономия для школьников: Солнечная система

... Future seminars . P a s t seminars . Seminar council . Extrarasolar planetary systems: regularities are found out " . Leonid Ksanfomaliti (IKI) . ... The discovery in 1995 of the first extrasolar giant planet (51 Peg b) initiated the physics of extrasolar planetary systems. ... Metallicity has become an indicator of the possible presence of planetary systems and, probably, even determines the type of planets. ...

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• MARS TOGETHER
• Mass Measurements aboard Space Station Skylab
• Far-out Pathways to Space: Solar Sails

... Bad Astronomy . ... Bitesize Astronomy . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... I had to lean backwards a little to make sure we didn't topple over, and as I spun her in a big circle around me I made a little circle on the floor too. ... The Earth, for example, has a mass about 81 times that of the Moon. ... It is mathematically correct to say that it is the barycenter that orbits the Sun, while the Earth and Moon circle the barycenter. ... 2008 Phil Plait. ...

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• Phil Plait's Bad Astronomy: Misconceptions
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