... 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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• Why do some stars appear to flash a variety of different colors when you look
• Does the time it takes different methods to create all the elements coincide
• Magnetic fields, subatomic particles, etc., traveling in different directions

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Risks Comparable to NEOs . ... The Increasing Rate of Discovery of Asteroids . ... Comet and Asteroid Collision Probabilities . ... Extreme albedo comets and the impact hazard (PDF Format) . ... Asteroid Impact Animations . ... Workshop on Scientific Requirements for Mitigation of Hazardous Comets and Asteroids - 2002 . ... The Spaceguard Survey Report, 1992 (PDF) . Tsunami from Asteroid/Comet Impacts . ...

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• Observing alert: has Jupiter been hit? | International Year of Astronomy in

ATMoB "Open Cluster Observing Award " Guidelines Purpose: To promote observing among the membership of the Amateur Telescope Makers of Boston through participation in the Open Clusters Observing Awards program. Introduction: This awards program is oriented towards visually observing open clusters above magnitude 9.9. ... It turns out that a very unprejudiced and convenient method to dermine the limiting magnitude is to count the number of visible stars in certain areas on the sky. ...

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• Amateur Telescope Makers of Boston ATMoB Observing Awards Program

... Science . ... The goal is to bring together two communitities: the one working on star formation (mostly galactic) and the one working on the formation of young massive clusters (mostly extra-galactic). We will link galactic with extra-galactic work, optical/NIR techniques with sub-mm/mm/radio ones, the formation of stars with the one of massive star clusters - observations and theory. ... Coordinated by Marina Rejkuba (abstract) . ... How did star formation proceed in Globular Clusters? ...

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• ESO - Thesis Topic: Dynamical models of multiple globular cluster populations
• ESO - Thesis Topic: The onset of cluster formation near young high-mass stars
• ESO - VIMOS Science Verification Programs at Melipal/UT3

Educator's Guide to Impact Craters . ... Just about all craters have deep central depressions, raised rims, and a blanket of ejected material surrounding them. ... Look for classical cratering features: basin, raised rim, ejecta blanket (material excavated from the crater and dumped around it, visible as white flour on the colored powder), and rays (material shot out at high velocity forming lines pointing directly away from the impact site). ... The material lies like a blanket around the crater. ...

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• Cannibal Stars Cause Giant Explosions in Fornax Cluster Galaxy (ESO Press
• APOD: May 22, 1996 - Star Cluster in the Rosette Nebula
• Chain of Impact Craters Suggested by Spaceborne Radar Images

... The concerns here are similar to those for observing bright targets; saturation and blooming of the bright companion PSF must not impact the faint target. Also, one may need to consider subtracting the PSF of the bright object, and effects which limit the accuracy of that subtraction. If the bright companion will saturate and bloom, it will be necessary to rotate the CCD so that blooming along the CCD columns does not obliterate the faint target. ...

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• Gauging the impact of executing science program across different COS/FUV
• NICMOS Observing Strategies
• HST Observer Monthly

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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The Arecibo Galaxy Environment Survey (normally known as AGES) is using the Arecibo Telescope to search for galaxies in a number of quite different areas of the local universe. ... NGC 628 group (precursor) - published (Auld et al., ... NGC 1156 (isolated galaxy) - published (Minchin et al, 2010, AJ, 140, 1093) . NGC 7332/9 galaxy pair - published (Minchin et al, 2010, AJ, 140, 1093) . ... NGC 5523 (isolated galaxy) - completed (contact: Robert Minchin) . ... AGES team page - password protected . ...

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• The CIMA Observing Modes
• observing techniques
• CIMA Frequently Asked Questions

... Pwyll: Icy Crater of Europa . ... The impact crater Pwyll (a name from Celtic Mythology) is thought to represent one of the youngest features on the surface of Jupiter's moon Europa. ... A Star Cluster Through Hale-Bopp's Tail . ... Comet Hale-Bopp continues to look impressive. ... Comet Hale-Bopp is being observed by many different telescopes. ... As Comet Hale-Bopp spins, parts of the comet's surface shoot away in jets. ... The surface of Jupiter's moon Europa has shifted. ... It's Comet Hale-Bopp...

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• Observing mode support
• XMM-Newton SAS: Watchout Page

... Exposure Time Calculator (ETC) . ... ESO - Public Surveys . ... the recommended values to use for DIT, . ... Detector on-chip integration (DIT): seconds. to your chosen value - a separate page gives recommended values to use for DIT - for modes 1 and 2 below you may wish to start with the maximum recommended values as these will minimize the effect of read noise (a total object exposure of Y secs with DIT=X secs will produce Y/X lots of read noise) and give you a lower limit on the time needed. ...

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... January 4, 1999 . Ring Around the Cluster . ... Explanation: It is difficult to hide a galaxy behind a cluster of galaxies. The closer cluster's gravity will act like a huge lens , pulling images of the distant galaxy around the sides and greatly distorting them. ... The cluster CL2244-02 is composed of many yellow galaxies and is lensing the image of a blue-white background galaxy into a huge arc. ... About APOD > . ...

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• APOD: 2008 December 8 - The Dark Doodad Nebula
• Отдел Изучения Галактики и переменных звезд
• APOD: December 8, 1999 - Moon Struck

... SEARCH ASP SITE: Match ALL words Match ANY word . ... Comet Hyakutake wowed us this spring [see Guest Observer, May/June, p. 11]. ... The best time to observe a meteor shower is after midnight, as your nighttime location moves head-on into the path of the cometary debris. ... As observers, we are interested in the number of Perseids per time interval. ... Tabulate the number of meteors observed per interval, and make sure to label the table with the local time and date of each interval. ...

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• ASP: Using Multicultural Dimensions to Teach Astronomy
• ASP: Cosmic Collisions
• ASP: Let Venus Be My Guide

... Ciel Espace, le magazine qui vous guide toujours plus loin . ... Ciel Espace, nouvelle formule, c'est . ... Accueil Stardust va observer le cratГЕre de Deep Impact sur la comГЕte Tempel 1 . ... Voir et mesurer le cratГЕre de Deep Impact permettra de savoir quelle est la consistance de Tempel 1 et dГїduire ses propriГїtГї mГїcaniques. ... De plus, les propriГїtГїs du cratГЕre fourniront aussi une indication plus prГїcise de la structure de cette comГЕte, qui a une influence sur sa rГїponse Г un...

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• Kaguya sur la Lune : la photo de l'impact | Ciel et Espace
• Observez l'impact m†йt†йoritique sur Jupiter ! | Ciel et Espace
• Suivez en direct le double impact sur la Lune | Ciel et Espace

... Observing . The Parkes 21cm Multibeam Receiver consists of a 13-beam cooled 20cm receiver system, located at the prime focus of the 64m dish. ... Signals from 26 channels (note 2 polarizations) are down-converted and sent to the pulsar Multibeam filterbank system in the control room. This provides 2 x 96 x 3 MHz channels for each beam. Signals from the centre beam are tapped off and can be sent to other filterbank systems or the Caltech correlator. ... Group . ... Pulsar Groups . ...

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• A Statistical Comparison of Line Strength Variations in Coma and Cluster
• Radio Images of the Globular Cluster 47 Tucanae
• Blind HI Survey in the Centaurus and Fornax Clusters

... By R.A. By NGC/IC . ... By R.A. Andromeda . ... Canis Major . ... Canis Minor . ... Leo . ... Leo Minor . ... Ursa Major . ... Ursa Minor . ... By Catalog Type . ... By R.A. Messier . ... Herschel 2500 . ... Herschel 400 (I) . ... Globular Clusters . ... AL Globular Club . ... AL Planetary Club . ...

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• http://www.wro.org/neumann/astronomical_lists.html
• http://www.wro.org/neumann/abell_lists.html
• http://www.wro.org/scodova/observations.html

... Observing . ... Home Education Workshops at Adorama Astronomy Workshop: Observing Variable Stars from the City ? February 15, 2015 . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... Presented by€а Adorama €аFor the Amateur Astronomers Association of New York . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

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• Deep Sky Images by Joe DiNapoli ? Amateur Astronomers Association of New York
• Michael Krypel Gallery ? Amateur Astronomers Association of New York
• Observing ? Amateur Astronomers Association of New York

... Bad Astronomy . ... Bitesize Astronomy . ... Bad Astro Store . ... Slacker Astronomy . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Life Under the Moon . ... Seeing Jupiter's Moons . ... Time Zones and the Spherical Earth . A Companion to the Earth? ... December 19, 1999) . ... Big Moon, Little Moon . ... How Big is the Moon? ... 14, 2000) . ... 2008 Phil Plait. ... Subscribe to the Bad Astronomy Newsletter! Talk about Bad Astronomy on the BA Bulletin Board! ...

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... Archives . ... my first AAS. ... I was questioned by two attendees, acquainted before the AAS, if I can suggest them clustering methods relevant to their projects. ... classification vs. clustering or supervised learning vs. unsupervised learning : the former terms from the pairs indicate the fact that the scientist already knows types of objects in his hands. ... Tags: Classification , clustering , cosmology , spatial statistics , supervised learning , test , unsupervised learning . ...

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• The AstroStat Slog Cross-Cultural
• The AstroStat Slog clustering
• The AstroStat Slog Data Processing

... Correia, S., Carbillet, M., Fini, L., Bertero, M., Boccacci, P., Vallenari, A., Richichi, A., & Barbati, M. 2001, in ASP Conf. ... AIRY is a modular software package designed to simulate optical and near-infrared interferometric observations and/or to perform subsequent image restoration/deconvolution. ... Bertero, M., Boccacci, P., Correia, S., & Richichi, A. 2000, in Interferometry in Optical Astronomy , ed. P. J Lena & A. Quirrenbach, SPIE 4006, 514 . ...

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• The Removal of Periodic Read-Out Patterns from Science Frames
• Automated Globular Cluster Photometry with DASHA
• A Commodity Computing Cluster