... Aurora Shimmer, Meteor Flash . ... Southern Geminids . ... Dust particles strung out along the orbit of extinct comet Phaethon vaporize when they plow through planet Earth's atmosphere causing the impressive display. ... In 1996, an unexpectedly bright comet passed by planet Earth. ... Created as planet Earth sweeps through dusty debris from extinct comet Phaethon, the annual Geminid meteor shower is predicted to peak on December 14th, around 0510 UT (12:10am EST). ... December 2013 . ... December ....

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Title: A New Model of the Gravitational Lens 0957+561 and a Limit on the Hubble Constant . Authors: Norman A. Grogin , Ramesh Narayan (Harvard Univ.) ... Title: ROSAT/PSPC observation of the distant cluster CL0939+472 . ... Title: Interaction in the Bimodal Galaxy Cluster A3528 . ... Title: Cosmological Implications of Galaxy Cluster Evolution . ... Title: Galaxy Cluster Virial Masses and Omega . ... Matches 201 to 222 from a total of 222 matches for the search pattern galaxy cluster . ...

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... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2009 December 20 . Tutulemma: Solar Eclipse Analemma . ... Explanation: If you went outside at exactly the same time every day and took a picture that included the Sun, how would the Sun appear to move? ... Pictured is such a total solar eclipse analemma or Tutulemma - a term coined by the photographers based on the Turkish word for eclipse. ...

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• APOD: December 1, 1997 - Orion: The Big Picture
• APOD: 2009 December 18 - Southern Geminids
• APOD: 2006 December 19 - Massive Stars in Open Cluster Pismis 24

. Image created by Miruna Popescu, showing some of the objects displayed in the Armagh Observatory's Human Orrery. Original images from NASA were used.

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Next: A Region mask for Up: To produce a region Previous: Select a circle around . select cursor and box . The three mouse buttons have been redefined as: . LEFT - moves the center of the box to the position of the arrow point. MIDDLE - sizes the box. ... Release the button to fix the size of the box. save the results by typing `s' while the mouse is in the display window. select region and write , to write the saved regions into a file for later use (as above). rsdc@cfa.harvard.edu . ...

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... 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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... 2013_December s131215_200408 not include in standard . ... 2011_June s110622_141256 not include in standard . ... OtherProjects t100405_182443 not include in standard . ... 2010_January t100110_181805 not include in standard . ... OtherProjects s081218_213556 not include in standard and timing . ... 2008_July s080724_073327 not include in standard and timing . ... 2007_September a070910_055634 not include in standard . ... OtherProjects a070819_052215 not include in standard and timing . ...

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... Please accept our apologies and stay tuned for updates. This workshop is intended as a forum to discuss exploration of the post-recombination era and the early stages of galaxy formation. It is aimed at helping researchers, leaders of ground-based and space astronomy, and policy makers share and understand the latest results in observational cosmology, and identify the most promising strategies for the future. ... Aim and Scope of the Workshop . Tentative Agenda . ... Hotel Information . ...

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... Gift Center . ... Why do aurorae appear strongest within rings centered on Earth's poles instead of filled-in circles? ... RELATED TOPICS: AURORAE . The visible aurorae result from electrons that move along magnetic field lines from space into the upper atmosphere. ... Just make sure you're registered with the website. Get instant access to subscriber content on Astronomy.com! ... If you are already registered on Astronomy.com, please log in below. ...

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• Why do sunspots appear in groups? | Astronomy.com

... Listed below are questions submitted by users of "The Exploration of the Earth's Magnetosphere" and the answers given to them. ... The ones included below are either of the sort that keeps coming up again and again--the danger of solar eruptions, the reversal of the Earth's magnetic field, etc.-- or else the answers make a special point, going into extra details which might interest other users. ... Radiation Belts and Manned Space Flight . ... Capturing the Energy of the Solar Wind . ...

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... Full version (including all figures and appendices [3.1 MB]) . Reduced version 1 (except german summary and appendices [2.4 MB]) . Reduced version 2 (except german summary, appendices and figures [0.2 MB]) . ... Figures of Chapter 2 (10 figures [1.4 MB]) . ... Chapter 2 ( Photometry of galaxies in selected CCD fields [1.4 MB]) . ... Chapter 6 ( Summary and Future Work [40 kB]) . Chapter 7 ( Zusammenfassung (German summary) [36 kB]) . Appendix A ( The photometric catalog [65 kB]) . ...

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The Wideband Arecibo Pulsar Processor - File Format Page . WAPP files have three sections that appear sequentially in this order: an ASCII header description, the binary header, and finally the actual binary data. ... The WAPP realtime observation engine does not produce files larger that 2 Gbytes. At one time this represented a fundamental limit to Linux files. ... Each file will have it's own header, even when the files are simply continuations of a single observation. ... long int . ...

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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

OptInt PmWiki : Pm Wiki / Wiki Style Examples . Wiki styles | ... PmWiki uses WikiStyles for styling text with color and other attributes. PmWiki 2.0 introduced the ability to control the styling further and to even place styles on blocks. ... In addition, an author can define a style "shortcut" by using the define= property. For example, to define a style of %red% , one can use: . define=mystyle color=red% Here is some %mystyle% red text created using a style shortcut. ...

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• OptInt PmWiki : Include Other Pages | Attach
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... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. December 18, 1999 . Irregular Galaxy Sextans A . ... Their newly formed, bright, blue star clusters found along beautiful, symmetric spiral arms are guaranteed to attract attention. But small irregular galaxies form stars too , like this lovely, gumdrop-shaped galaxy, Sextans A . ... About APOD > . ...

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Recent molecular observations indicate supersonic cloud-cloud collision is one of the important modes of O star formation. The O star formation regions studied so far include super star clusters (Westerlund2, NGC3603, RCW38 etc.), mini-starbursts (NGC6334, NGC6357 etc.) HII regions (M42/43, M20 etc.), and Spitzer bubbles (RCW120 etc.) ... Since the collision time scale is short ~10^5 yrs, O star formation is a rapid process with a mass accretion rate higher than 10^-4Mo/yr. ...

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• Gary Da Costa's Home Page
• Gary Da Costa's Preprints Page
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... 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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• Index of /software/sbig/archive/xmccd-4.1/xmccd-4.1e/libcfitsio/include

CATS home ] [ Back to CATS list ] Desription file of catalogs including in search . This file decribes the CATS catalogs. ... Radio Sources at 2.7 GHz 11CMBONN 11CMB r 2.7 1990A .. ... 37Edge+ A Survey of radio sources at frequency 159 Mc/s 3CR 3COPT o - 1990PASP.. ... 779Waldram+ The 7C Survey of Radio Sources at 151 MHz 7CG 7CG r 0.151 1998MNRAS.294.. ... 12Mingaliev Khabrakhmanov Spectra Study of a Sample of Radio Sources from the 87GB Catalog 8C 8C r 0.038 1995MNRAS.274.. ...

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Here is a description of the Filter/Driver Pack Plus release from Aldus. ... The Macintosh Filter/Driver Pack Plus includes several new and updated filters, including import filters for Microsoft Works 3.0 and MacWrite Pro files, as well as the most recent LaserWriter driver, version 8.1.1. ... The Filter/Driver Pack Plus also includes a patcher utility which will update PageMaker 5.0 to version 5.0a. This patcher corrects a handful of reported customer problems. ...

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• COMPLEX DATA ANALYSIS
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Questions relevant to "Exploration of the Earth's Magnetosphere" will be answered, to the extent time allows. If a question seems to be worthy of broader interest, it and its answer (suitably edited) may be added to the list appearing in "Exploration." ... Please do observe the following: . ... Asking about matters which are far beyond the scope of "Exploration." ... Posing a question without first checking if it was answered in the main files of "Exploration" or in the question-and-answer list. ...

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