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: Taking a Grand Virtual Voyage in the Milky Way
• ASP: Black Holes to Blackboards: The Sun is a Mass of Incandescent Gas

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• Surface Gravity
• Jupiter
• Atmospheres: big planets are all atmosphere

Astronomy Discussion Forums . Forums: . ... Discussion Forums . ... Gravity Of Planets Mass . Forum List | ... Post Message | ... Login to Post . ... www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

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• Teleportation - an Astronomy Net Gravity Forum Message

... George Benedict, University of Texas at Austin . ... Abstract . ... Hubble Heritage Observations of Arp 87 . ... The Fine Guidance Sensors on HST are the only system currently capable of making observations at the required sub-milliarcscond accuracy, and has already been used for astrometry of four systems, including the M dwarf Gl 876. The current GO program pursues observations of six planetary hosts; the final set of FGS observations of HD 47536 is scheduled over the next week. ...

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• ST ScI Preprint #1390
• Research Groups
• Steve Lubow

... Gas in Thermodynamic Equilibrium Conditions. Stellar Spectrums. Physical Basis of Spectral Classification of Stars. ... The Sun. General Stellar Feature of the Sun. ... Distribution of Brightness in Solar Disc. ... Chromosphere - Observations on Limb and Disc of the Sun, Basic Elements of Structure, Spectrum, Physical State. ... Solar Corona - Observation, Structure, Spectrum, Polarization, Dynamics, Rotation, Physical Condition. ... Interstellar Dust. ... Two Groups of Big Planets. ...

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• Spherical and Practical Astronomy
• Introduction to Astronomy
• Physics and Chemistry of Comets

... 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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• Do the gas giant planets have discernible surfaces? If so, would they support
• Bright planets meet at dusk | Astronomy.com
• New technique measures mass of exoplanets | Astronomy.com

... We have examined the diversity of planets and planetary systems that arise from oligarchic growth and gas accretion onto massive cores, by means of N-body simulations combined with a sophisticated disc model. ... Slow planetary growth resulted from the relatively low mass of solids in the disc, and one consequence of this is that planets underwent limited orbital migration during the lifetime of the gas disc. ... Figure 1 shows an example of this migration behaviour in a single-planetin-a-disc run. ...

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• http://www.mrao.cam.ac.uk/wp-content/uploads/2014/04/LMatra.pdf
• http://www.mrao.cam.ac.uk/wp-content/uploads/2014/04/AMustill.pdf
• Data | ALLSMOG

... One of this year's largest mass ejections from the Sun's atmosphere was recorded last Sunday by TESIS telescopes aboard the CORONAS-PHOTON satellite ( video - wmv 4.3 MB ). ... Over the course of a week, two gigantic solar prominences were simultaneously ejected from the surface of the Sun. ... Earth will not feel the Sun's influence either. ... The TESIS observatory ї TESIS: www.tesis.lebedev.ru . ... One of this year's largest mass ejections from the Sun's atmosphere (movie WMV, 4.3 MB) . ...

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... Here a very distant QSO happened to be placed right behind a massive galaxy. ... Our Solar System from Voyager . ... Four of the galaxies show essentially the same redshift suggesting that they are at the same distance from us. ... There are more than a few stars in our Galaxy. ... Sometimes, however, a burst of star formation can occur with unusual geometry. Nearby galaxy NGC 1317 shows such an unusual ring of star formation surrounding its barred nucleus. Comet Halley's Nucleus . ...

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... Дни открытых дверей к юбилею САО РАН (12-14 апреля 2016 г.) . Международная конференция "Dark Ages and White Nights (Spectroscopy of the CMB)" (20-24 июня 2016 г.) . ... Международная конференция MULTI-SPIN GALAXIES - 2016 (26-30 сентября 2016 г.) . Международная астрономическая конференция "Физика звезд: от коллапса до коллапса" (3-7 октября 2016 г.) Архив . ... Подробнее.. ... 10.02.16 . ... БТА в реальном времени . ... Цейсс-1000 в реальном времени . ... Последнее обновление: 22/03/2016 ...

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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
• Astronomy HyperText Book: Interstellar Medium
• Venus and Mars

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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. Space vehicle "Mariner-4". “Mariner” (English "Mariner" - a sailor) is an american autometic interplanet series for Venus, Mers, Mercury and Space investigations. They are designed for the planets flight and bringing in to the planetocentrial orbits. The maximum starting mass of "Mariner" is about 1 tone. In 1962 - 1973 10 "Mariners were launched. The surveys made by "Mariner-4" showed that Mars is also covered with the craters. The mass of the planet and its atmosphere was calculated. Back .

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• venerae
• jupitere
• plutone

Astronotes Armagh Planetarium's Stellar Blog! ... Armagh Planetarium . Colin Johnston . ... Moon . ... Space Flight . ... June . ... By admin July 17, 2012 Posted in: Colin Johnston . ... Image credit:Don Pettit/NASA) . ... Image credit:NASA) . ... 4 June:The US intelligence community giving NASA two surplus giant spysats for conversion to Hubble-style space telescopes. ... 18 June:€аa Chinese space docking . ... Hello, IтАЩm Colin, welcoming you to Astronotes, the PlanetariumтАЩs official blog. ...

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• Kepler-10c: the First Mega-Earth | Astronotes
• Exoplanet HAT-P-1b: weird, warm and fuzzy | Astronotes
• Solar System | Astronotes - Part 8

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• Dust grains from the heart of supernovae
• The Planet Jupiter
• Sun, Planet and Satellite Data

... Bad Astronomy . ... Bitesize Astronomy . ... Last week's Snack talked about how black holes can affect the environment around them in such a way as to be very bright . ... It's a common misconception that black holes always have matter swirling into them. ... As this matter gets closer and closer to the black hole it piles up and a large, fairly flat disk forms. This is called the accretion disk , because matter from this disk accretes (that is, falls in) on the black hole. ... 2008 Phil Plait. ...

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• Phil Plait's Bad Astronomy: Misconceptions: Planet X and Nancy Lieder
• Phil Plait's Bad Astronomy: Bitesize Tour of the Solar System
• Phil Plait's Bad Astronomy: Misconceptions: James McCanney's Nonsense

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• Extra-solar planets
• Slide 25
• Slide 11

... 2005 August 13 . SNR 0103-72.6: Oxygen Supply . ... Chandra Observatory , NASA . Explanation: A supernova explosion, a massive star's inevitable and spectacular demise , blasts back into space debris enriched in the heavy elements forged in its stellar core . ... Seen here in a false-color x-ray image, supernova remnant SNR 0103-72.6 is revealed to be just such an expanding debris cloud in neighboring galaxy, the Small Magellanic Cloud. ... About APOD | ... NASA Official: Jay Norris. ...

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• APOD: 2003 May 28 - SNR 0103-72.6: Oxygen Supply
• APOD: May 5, 1996 - Planet Near a Galaxy Core
• APOD: 2009 September 23 - CoRoT Satellite Discovers Rocky Planet

... Image courtesy of Korea Astronomy and Space Science Institute . ... There are already 29 multi-planet extrasolar planetary systems discovered (including this last one), so what makes this particular system unique? ... International Year of Astronomy, Ireland National Node . ...

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• Venus, Jupiter, Moon Conjunction and Occultation
• The Planets go round the Sun | OASES for Peace Over us All is the SElfsame Sky
• The Planets go round the Sun | OASES Over us All is the SElfsame Sky | OASES

... 8, ``Celestial Mechanics'', 2002 Estimation of masses of some minor planets from observations of perturbed bodies O. M. Kochetova Institute of Applied Astronomy, St. Petersburg, Russia The most straightforward method of mass determination of minor planets is the dynamical one which uses the gravitational perturbations produced by minor planet in the motion of other bodies. ... The values of the masses of minor planets (15), (29) and (65) appear to be rather close in both papers. ...

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• Values of asteroid masses
• Keywords_237
• (Untitled)