... 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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Making HST Pictures: Examples and Illustrations . ... These illustrations represent some of the steps and techniques used to produce “pretty pictures” from HST images. ... TIFFs (ftp) . ... Separate images are exposed through different color filters. ... An alternate way to make color images . ... Eight bit (one byte) images contain 256 different values that may be represented by 256 shades of gray or 256 arbitrary colors from a color map (or palette) of all possible colors. ...

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• STIS Instrument Handbook
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2009-05-20 O.Hainaut There are many steps between the data coming out of a camera on a professional telescope and the final image that appears in magazines or on our web sites. ... preliminary: from the telescope to Photoshop. cleaning: remove the artifacts remaining in the image . ... In each filter, several images are acquired. ... Fig 1: a raw image (click for full scale) . ... At this stage, the images are still in FITS, the astronomical format, with one FITS file per filter. ... The final image. ...

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• The Pencil Nebula, a strangely shaped leftover from a vast explosion | ESO

A Scorpio Sky Spectacular . ... Scorpio more typically appears as a few bright stars in a well known but rarely pointed out zodiacal constellation . To get a spectacular image like this , though, one needs a good camera , color filters , and a digital image processor. ... Visible there are vast clouds of bright stars and long filaments of dark dust . ... This river connects to several bright stars on the right that are part of Scorpio's head and claws , and include the bright star Antares . ...

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... Class . ... FIELD | ... public class Undo . ... This class consists of static methods and fields that implement ImageJ's Undo command. ... static int . ... Field Detail public static final int NOTHING . ... public static final int FILTER . ... public static final int TYPE_CONVERSION . ... public static final int PASTE . ... public static final int COMPOUND_FILTER . ... public static final int COMPOUND_FILTER_DONE . ... public static final int TRANSFORM . ... public static final int OVERLAY_ADDITION ...

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• Filters (ImageJ API)
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... 11 Yellow-Green (78% transmission): Contrasts well with the red and blue characteristics of surface features on Jupiter and Saturn. ... 82A Light Blue (73% transmission): Useful on the Moon, Mars, Jupiter, and Saturn, this subtle pale blue filter enhances areas of low contrast while avoiding significant reduction of overall image brightness. ... Meade Series 4000 Photo-Visual Color Filters may be ordered individually or in the following sets: . ... Meade Series 4000 Broadband Nebular Filters . ...

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• Meade Series 4000 Broadband Nebular Filters
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• Coronado SolarMax II 60mm Solar Filter set with RichView tuning and 30mm

Galaxies are diffuse objects which are imaged against a background of finite brightness and noise. Galaxies which have the maximum contrast with respect to this background are the ones that are first discovered. ... These galaxies have been missed to date but active surveys for them are underway. ... In this page we present several examples of these newly discovered Low Surface Brightness galaxies as well as examples of high surface brightness galaxies. ...

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• Low Surface Brightness Galaxy Gallery

From: TerryMosel@aol.com Date: Mon, 16 Sep 2002 15:48:14 EDT Subject: Possible Nova + ASGI meeting Hi all, 1. ... The Autumn 2002 ASGI meeting will be `hosted' by the Departments of Information Technology and Experimental Physics at the National University of Ireland, Galway, and will take place on Friday the 18th of October in the Seminar Room of the National Centre for Biomedical Engineering Science, which is situated at the north end of the University campus. ... Terry Moseley . ...

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• Bright fireball seen over Ireland | International Year of Astronomy in Ireland
• Armagh Observatory

Next: Descriptor NFILTCAR Up: Instrument descriptors Previous: Instrument descriptors . The two most critical types of physical information needed about the filters themselves are (1) what are their transmission curves? and (2) does the instrument either regulate or measure their temperature? ... In addition, we need to know how many different filter-code fields appear in the data. Bearing all this in mind, here are the descriptors for filters: . Pascal Ballester . ...

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• Adaptive filtering from the wavelet transform

... The combined event list takes from the intermediate event lists all of the events (combined into a single table), the collections of CCD-specific exposure tables and Good Time Interval (GTI) tables, and the collections of node-specific bad pixel tables and rejectable pixel tables. Name collisions among tables copied in from the intermediate event lists are avoided by placing the corresponding CCD number at the eighth character of the extension name. ... table : EVENTS -- evlistcomb . ... int32 . ...

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• Stage Three: ``filter''

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

Images and text 2003 Paul Valleli . While up at Stellafane for pre-convention preparations, I spent some early morning times, experimenting with different videography setups on the 13" F/10 Schupmann at the McGregor Observatory. ... Mars was too bright and would have required neutral density filters. ... Next time, I will try 12mm and 9mm projections. ... I aquired about ten thousand frames by 3AM, at which time a breeze picked up and the seeing went to Hellas! ... 2003 Paul Valleli . ...

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• Amateur Telescope Makers of Boston

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2007 September 11 . A Scorpius Sky Spectacular . ... Scorpius more typically appears as a few bright stars in a well known but rarely pointed out zodiacal constellation . ... Visible there are vast clouds of bright stars and long filaments of dark dust . ... About APOD | ... NASA Official: Phillip Newman Specific rights apply . ...

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• APOD: 2005 August 8 - Mars to Appear Normal this August
• APOD: 2014 May 4 - A Scorpius Sky Spectacular
• APOD: 2003 August 13 - Mars Rising Behind Poodle Rock

... V838 Mon is a member of a new class of eruptive variables which appear as a peculiar novae having late K-M type spectra in their outburst. Before its outburst, it was a wide binary system of B3V type stars. ... The B3V companion was seen in the outburst in the UV spectrum taken with HST (Rauch et al., ... In the latest spectra, the light of B3V companion was predominating in the short-wave photometric bands. ... CCD blue frames of V838 Mon before the eclipse (left) and in the eclipse (right). ...

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• SCORPIO-2 project: filters

... This information may be for older NA2 filters?? Filters There are 7 filter positions, containing the following filters from Custom Scientific . ... 0 - Bessell R . ... The only filter requiring a focus offset is the ND2 + R filter which will be measured on the sky. ... The red filter attached to the ND2 in position 6 is not the same as the Bessell R. Number 6 is an RG610 red glass filter ( Rolyn 65.1355 ) for the 610 nm cut-on. ... Focus . ... Guider Mechanical Controller (filter and focus) . ...

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• TUI:TUI Menu:Log Windows
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... Обзор LPR фильтра. Впечатления от наблюдений с LPR фильтром. ... Характеристики цветных фильтров Baader-Planetarium . Мой перевод pdf- файла о фильтрах с сайта Baader-Planetarium (379 кб) . ...

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• Baader NEODYMIUM (Moon & Skyglow) filter

The Sun is our nearest star and the source of energy for life on Earth. ... For centuries astronomers wondered whether they were clouds floating in the Sun's atmosphere, but we now know that they really are huge regions of magnetic field, about as intense as the field at the poles of an iron magnet. ... Such abrupt events were named solar flares , and what made them especially interesting was that occasionally, after a prominent flare, a magnetic storm would erupt on Earth. ...

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• Close-up of the Aurora

... 1998, 15, 147­8 . An Imaging Survey of Northern Galactic H Emission with Arcminute Resolution Brian Dennison, John H. Simonetti and Gregory A. Topasna Martin Observatory, Institute for Particle Physics and Astrophysics, Physics Department, Virginia Tech, Blacksburg, VA 24061, USA dennison@astro.phys.vt.edu; jhs@vt.edu; topasna@astro.phys.vt.edu Abstract: We present preliminary results from a high-resolution, high-sensitivity imaging survey of the northern galactic H emission. ...

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• The HIPASS Bright Galaxy Catalog
• casacore: casa::LogSinkInterface Class Reference
• MCELS Details

adapted from Observe: Eclipses, published in 1979 by the Astronomical League and "Safe Solar Filters," by B. Ralph Chou, Sky and Telescope, August 1981) . ... Tape TWO pieces of film together into a sandwich, and tape this over the opening in the cardboard. ... The cardboard frame will act as a shade from the bright Sun, while you safely observe through the film sandwich. ... Undeveloped film is not safe. ... tape . ... At the end of one of the tubes, tape the aluminum foil, and make a tiny pinhole. ...

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• ASP: Making a Rainbow
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• ASP: Accidental Astrophysics: The Devil's In the Magnitudes, Part II

. Comet ISON continues to brighten. In this image, it appears in the southeastern part of the constellation Leo the Lion. Look carefully around the field and you ll spot several faint galaxies, including one at the very tip of the comet s tail. Gerald Rhemann captured this image October 29 from Eichgraben, Austria, using a 12-inch Astro Systeme Austria ASA-12 astrograph at f/3.6, FLI ML-8300 CCD camera, LRGB image with 15-minute exposures through each filter. Gerald Rhemann

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• Observing the bright stuff | Astronomy.com
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• Using filters | Astronomy.com