Astronomy Picture of the Day . ... In 2009, during Saturn's last equinox, Saturn's thin rings threw almost no shadows onto Saturn, since the ring plane pointed directly toward the Sun. NGC 7635: The Bubble Nebula . ... One solar day on a planet is the length of time from noon to noon. ... The Comet Hartley 2 Cruise . ... Early last November, small but active Comet Hartley 2 (103/P Hartley) became the fifth comet imaged close-up by a spacecraft from planet Earth. ... Comet and CME on the Sun . ...

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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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• Our Galaxy | Astronotes - Part 4
• Exoplanet HAT-P-1b: weird, warm and fuzzy | Astronotes
• Our Galaxy | Astronotes - Part 5

... November 17, 1998 . NGC 7635: The Bubble Nebula . ... A massive star that is not only bright and blue, but also emitting a fast stellar wind of ionized gas . The Bubble Nebula is actually the smallest of three bubbles surrounding massive star BD+602522 , and part of gigantic bubble network S162 created with the help of other massive stars. ... The Bubble Nebula , also known as NGC 7635, is about 10 light-years across and visible with a small telescope towards the constellation of Cassiopeia . ...

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• APOD: 2008 November 17 - HR 8799: Discovery of a Multi planet Star System
• APOD: 2005 November 7 - NGC 7635: The Bubble Nebula
• APOD: November 18, 1998 - Close Up of the Bubble Nebula

... A Snapshot Survey of The Most Massive Clusters of Galaxies . Abstract . ... Binaries in the Kuiper Belt: Probes of Solar System Formation and Evolution . ... SL2S: The Strong Lensing Legacy Survey . ... Increasing the Accuracy of HST Astrometry with FGS1r . ... GO 11113: Binaries in the Kuiper Belt: Probes of Solar System Formation and Evolution . A composite of HST images of the Kuiper Belt binary, WW31 . ... GO 11289: SL2S - The Strong Lensing Legacy Survey . ... Past weeks: . ...

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• Research Interests
• HST this week: 324
• HST this week: 299

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?

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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• Astronomers directly image massive star's "super-Jupiter" | Astronomy.com
• November 2006 | Astronomy.com
• Predawn planet parade | Astronomy.com

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
• Highlights 1999
• Armagh Observatory

... Click here to go directly to the Orion Nebula Images. ... Copies of individual figures from this paper are available from John Bally . ... Figure 1: The core of the Trapezium showing the four energetic massive stars and a plethora of Sun-like stars with surrounding extended emission. ... Click to download figure in jpeg format. Click to download figure in tiff format. ... Figure 3: A gallery of star-disk systems in Orion's Trapezium. ... To Doug Johnstone's Scientific Home Page . ...

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• Colloquia of the Star Formation Group
• APOD: November 30, 1999 - Henize 70: A Superbubble in the LMC
• APOD: 2000 November 8 - October Skylights

... Science . ... Science Users Information > Science and Technical Meetings > Conferences 2012 > Star and Planet Formation Workshop . ... Observing with ESO Telescopes . ... On 14 May 2012 we held a one-day workshop in the ESO Auditorium with the aim of bringing the star and planet formation community from ESO-MPE-USM together. ... J. Ascenso (ESO) Star formation in giant complexes . ... C. Manara (ESO) The role of accretion in the formation of stars and planets: a VLT/X-Shooter perspective . ...

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• ESO - PhD Thesis Topics offered by ESO Faculty Members
• ESO - Thesis Topic: High-Contrast Imaging of Planet-Forming Disks in
• Mario van den Ancker

... 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/AMustill.pdf
• http://www.mrao.cam.ac.uk/wp-content/uploads/2014/04/CTerquem.pdf
• http://www.mrao.cam.ac.uk/wp-content/uploads/2014/04/THands.pdf

Photon Scattering: Basic Principle of Photon Scattering . Audio Narration is available . No Scattering: Photon Source and Detector . ... For optical photons, scattering goes as wavelength to the -4 power. In the case of blue photons compared to red photons, this means that blue photons are about 10 times more likely to get scattered than red photons. ... Watch the blue photons scatter away from the detector . ... Interstellar dust make stars appear redder than they really are . ...

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• Saturn
• The Three Planet System
• All about Jupiter

... STScI-PRC95-45a CRUCIBLE OF CREATION: PANORAMIC HUBBLE MOSAIC ZOOMS IN ON MAELSTROM OF STAR BIRTH This spectacular color panorama of the center the Orion nebula is one of the largest pictures ever assembled from individual images taken with NASA's Hubble Space Telescope. ... Though this 2.5 light-years wide view is still a small portion of the entire nebula, it includes almost all of the light from the bright glowing clouds of gas and a star cluster associated with the nebula. ...

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• The Pleiades
• Extra-solar planets
• The Tarantula Nebula

. I will introduce the work I will be doing for my Masters Thesis. I will first give background on protoplanetary disks and their structures and features and then discuss which disks I will be studying and give an overview of the methods I will use to do this.

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• GSAOI Orion Nebula Cluster Science Page
• Mass Feeding and Feedback in Young Stellar Objects
• Dark Matter in Spiral Galaxies

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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• Astronomy articles, forums, listings, and other resources about Astronomy.
• Saturn And Others - an Astronomy Net Observation_reports Forum Message
• Blackholes Discussion Forum - Hosted by The Astronomy Net

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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• venera9photoe
• plutone
• jupitere

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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• Radio's role in studying massive stars
• Massive star Eta Carinae
• ATNF Daily Astronomy Picture

The Magician U ranus is the seventh planet from the Sun and the third largest (by diameter). ... Uranus was the son and mate of Gaia the father of Cronus (Saturn) and of the Cyclopes and Titans (predecessors of the Olympian gods). U ranus, the first planet discovered in modern times, was discovered by William Herschel while systematicly searching the sky with his telescope on March 13, 1781. ... U ranus has been visited by only one spacecraft, Voyager 2 on Jan 24 1986. ... more Uranus images . ...

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• Neptune
• Solar System Extrema
• Solar system [Oulu]

... 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)

... 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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