... 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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... Planets, Bees, and a Donkey . ... 22.06.2006 . ... Credit: Chris Schur Explanation: The heralded alignment of wandering planets Saturn and Mars with the well-known Beehive Cluster took place last weekend on Saturday, June 17 . Recorded in dark Arizona skies on that date, this view finds Mars above and right of Saturn - the brightest celestial beacons in the scene - with the Beehive cluster of stars (M44) at the lower right. ... June 2006 . ... Publications with keywords: Mars - star cluster . ...

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• XWare > APOD

... 2010 December 2 . Hartley 2 Star Cluster Tour . ... Explanation: Early in November, small but active Comet Hartley 2 (103/P Hartley) became the fifth comet imaged close-up by a spacecraft from planet Earth . ... Still a target for binoculars or small telescopes from dark sky locations, the comet is captured in this composite image from November 27, sharing the rich 2.5 degree wide field of view with some star clusters well known to earthbound skygazers. ... About APOD | ...

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• APOD: 2008 December 3 - A Happy Sky Over Los Angeles
• APOD: 2002 December 27 - X Ray Mystery in RCW 38
• APOD: 2012 January 11 - Little Planet Lovejoy

... Tonight's Sky . ... Observing . ... Sky this Month . ... Astronomy for Kids . ... Can you explain Mercury's retrograde motion? Do other planets appear to do this also? ... When astronomers talk about retrograde motion, generally they refer to the apparent motion outer planets make as Earth passes them while orbiting the Sun. ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

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• Astronomy Magazine - Interactive Star Charts, Planets, Meteors, Comets,
• Jupiter joins Venus in the early evening | Astronomy.com
• Dawn snaps its best-yet image of dwarf planet Ceres | Astronomy.com

... More than 100 circumstellar gas clumps with ionized rims have been detected by HST studies of the Orion Nebula H II region (O'Dell & Wong 1996). Seven additional objects appear as dark oval silhouettes seen against background nebula light (McCaughrean & O'Dell 1996); these are very likely to be protoplanetary disks seen in absorption. ... Eight fields were observed in H and I-band continuum in the nearby H II regions NGC 2024, NGC 2264, and S155. ...

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• HST this week: 337
• HST this week: 363
• HST this week: 343

Astronotes Armagh Planetarium's Stellar Blog! ... Comets and Asteroids . ... Image credit:ESO/J.Emerson/VISTA. ... However others are less pessimistic and it has even been claimed that the mysterious ?Wow! signal? received in 1977 originated from the direction M55.б  Sadly, this still unexplained pulse of radio energy originated from a location rather to the northwest of M55 so I doubt if the source was this cluster (if indeed the signal was genuinely of extraterrestrial origin). ... Mysterious Wow! ...

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• Omega Centauri: globular cluster of 300,000 stars | Astronotes
• History of the Universe in a Year | Astronotes
• A Spectacular View of the Lagoon Nebula | Astronotes

... The Pleiades star cluster, also known as the Seven Sisters and Messier 45, is a conspicuous object in the night sky with a prominent place in ancient mythology . ... The stars in the Pleiades are thought to have formed together around 100 million years ago, making them 1/50th the age of our sun, and they lie some 130 parsecs (425 light years ) away. ... Data for these stars are listed in a table below. ... Yes . ... WEBDA Pleiades cluster data . ... M45: The Pleiades Star Cluster (2007 November 18) ...

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Armagh Observatory, 28 May 2004: A very rare astronomical event occurs during the morning of the 8th June this year, when the planet Venus crosses the face of the Sun. During the event, known as a 'transit of Venus', the Earth's 'sister' planet Venus will appear as a small black disc, about one thirtieth the diameter of the Sun. The last transit of Venus occurred nearly one hundred and twenty-two years ago, in December 1882. ... Last Revised: 2004 June 4th . ...

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• The Twins' Meteors, Geminid Meteors
• Geminid Meteors
• May 2002 Planetary Alignment

... December 13, 1997 . The Coma Cluster of Galaxies . ... The Coma Cluster of Galaxies pictured is one of the densest clusters known - it contains thousands of galaxies . Each of these galaxies house billions of stars - just as our own Milky Way Galaxy does. ... In fact, the Coma Cluster is so big it takes light millions of years just to go from one side to the other! Most galaxies in Coma and other clusters are ellipticals , while most galaxies outside of clusters are spirals . ...

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• Astronomy Picture of the Day
• APOD: December 8, 1996 - Degas Ray Crater on Mercury
• APOD: December 18, 1999 - Irregular Galaxy Sextans A

... 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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Stellar Clusters are very useful laboratories for empirically studying stellar evolution. ... All cluster stars are at the same distance . All cluster stars have the same physical age . ... CM diagram Young Cluster In this case we see the Main Sequence fully represented. The blue dots represent massive stars with short main sequence lifetimes. ... Thus, identifying the most massive star which is still on the main sequence is an effective means of determining the age of a stellar cluster. ...

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• Astronomy Plus CCD Images of Galaxies
• The Three Planet System
• Orbital Properties of the Solar System

[ CATS home ] [ Back to CATS list ] [ ftp ] . 1986USydn.T00J....Reynolds

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• halos
• Screenshot of ESOcast 62: "Three Planets Found in Star Cluster" | ESO
• Which Ringed Planet...!? | ESO

... In typical nightly use, the wide field and planetary telescope and cameras record images of favorably placed objects in the sky, including constellations, bright variable stars, nebulae through narrow-band filters, comets, the Moon, and planets. ... Shared Skies telescopes are available for use by students at the University of Louisville and the University of Southern Queensland, and by teachers and students in middle and high schools mentored by faculty at the universities. ...

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... We still have a long distance to cover before we leave the Milky Way Galaxy -- tens of thousands of lightyears, as a matter of fact -- so let's stop by some interesting objects on the way. ... But we have reached the edge of the Milky Way Galaxy. ... We don't know, but we do know that there are countless voyages left to take. To continue the virtual voyage beyond our galaxy, go to Kent Cheatham's "A Walk in the Stars" at http://www.ionet.net/~cheatham/astro/astrotour.shtml . ...

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• ASP: A Good Definition of the Word "Planet": Mission Impossible?
• ASP: Monster Comet Promises Big Show
• ASP: How Do Planets Form?

... Any other use should be consistent with normal copyright law and your conscience. ... The images in The Nine Planets are almost all from NASA. ... These images may not be used to state or imply the endorsement by NASA or by any NASA employee of a comercial product, process or service, or used in any other manner that might mislead. ... Those with some legal expertise may wish to examine the extensive Copyright Law Materials from the Legal Information Institute of the Cornell Law School.. ...

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• Galileo Mission Status - December 10, 1995
• The Wind Spacecraft
• Dynamics of Pluto

... Assignments 4, 5 and 6 all involve the imaginary world of Ziggy. ... Each week, you should write a short executive briefing to Captain Howard, explaining to her what you have learned from that week's data. ... A 500 word limit applies to each briefing you submit. You will submit three briefing papers (due dates below): one for each data release. ... First briefing due (Assignment 4). 2nd data set released. ... Second briefing due (Assignment 5). 3rd and final data set released. ...

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• Gary Da Costa's Preprints Page
• Blue Straggler Stars
• Philip Lah's Research

The basic problems of the Laboratory are connected with researches of dynamics of minor planets and comets. ... THE ORBIT IMPROVEMENT of minor planets from optical and radar observations, . the utilization of minor planet observations for THE DETERMINATION OF ORIENTATION OF STAR CATALOGUES and DETERMINATION OF MASSES OF MINOR PLANETS BY DYNAMICAL METHOD, . THE ESTIMATION OF COLLISION PROBABILITY of minor planets with other bodies and with each other, . ...

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• (Untitled)
• LSBSS CONTENTS
• EPHEMERIDIES OF MINOR PLANETS (EMP)

Tuesday, 4 December 2012 Special Session 09:30 09:35 10:00 10:15 Welcome Fred Watson: Great Collaborations in Astronomy Daniel Bayliss: Characterising Exoplanets Graeme Salter: Direct Imaging of Anglo-Australian Planet Search Candidates Session 1: Stars & Planets > Coffee Break 11:00 11:15 11:30 11:45 12:00 12:15 Charles Kuehn: RR Lyrae in the LMC: Insights Into Milky Way Formation and the Oosterhoff Dichotomy Francesco Di Mille: The Giant Jet of the Sanduleak's star. ...

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• http://www.atnf.csiro.au/research/conferences/2012/boltonsymp/programme_v5.pdf
• http://www.atnf.csiro.au/research/conferences/2012/boltonsymp/programme_v4.pdf
• Compact Stellar Systems in the Fornax Cluster: Super-massive Star Clusters or

Astronomy Discussion Forums . ... Post . ... Three Planets . ... Post Message | ... Posted by John Huggins on December 21, 2002 16:11:51 UTC . ... Welcome back to Astronomy Net. ... Since this is the Christmas season, I added this forum to discuss what the three wise men saw in the sky. ... Alignment of 2 Planets - brooksquest - October 3, 2007 - 13:28 UTC . ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

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• Education Discussion Forum - Hosted by The Astronomy Net
• VRMars-Spirit - The Red Planet Mars 3D - VR Software On The MER - an Astronomy
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