... 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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Next: Basic Properties Up: R Coronae Borealis Stars Previous: Introduction . RCB stars are named after a star just visible to the naked eye in the constellation of Corona Borealis. RCrB was discovered by Edward Pigott, an English amateur astronomer, who had been observing a star in the `Northern Crown' for over a decade. ... Since 1795, other RCB stars have been discovered and their properties have been carefully observed. ...

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• HISTORICAL BACKGROUND
• Picture including some objects that appear in Orrery

... Primordial theory review : Dick Bond . Defects and the CMB review : Andy Albrecht . ... Gravitational wave contribution to CMB anisotropies : V.B. Lukash and E.V. Mikheeva . C_l from cosmic strings : Lloyd Knox . Some aspects of CMB anisotropies induced from topological defects : Mairi Sakellariadou . ... CMB anisotropies from scaling sources : Ruth Durrer . ... SZ observations I : Sarah Church . ... Holes in the microwave sky? ... Detecting cosmic strings in the CMB : James Robinson . ...

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• OptInt PmWiki : PmWiki / Wiki Style Examples
• OptInt PmWiki : Wiki Style Examples

... The WFPC2 CCDs have a small b ut significant charge transfer efficiency (CTE) problem which causes some signal to be lost when charge is transferred down the chip during readout. This has the effect of making objects at higher row numbers (more charge transfers) appear fainter than they would if they were at low row numbers. The effect depends on the temperature of the CCDs. ... It is also possible that proportional losses for fainter stars, at least with no background, may be larger. ...

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• What is the offset in the U2 direction that can be taken before a gap appears?
• Introduction
• WFPC2 Instrument Handbook Update

To run a process in the background as a job and carry on working add an (ampersand) at the end of the command line. ... The shell forks a child process to run the command and displays the job number ( [ n ] ) and the PID (Process IDentifier) number. ... If the command is likely to produce error messages you will need to redirect standard error. ... Do not run an interactive command that requires you to type something at the terminal as a background job. ... You will then have to kill its process . ...

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... For spectra a transformation from wavelength to frequency is used to identify spectral regions which follow a power law. This transformation is given by . ... Whereas the transforms mentioned above only perform a non--linear rebinning of the data, the Fourier transform converts a spatial image into the frequency domain. ... As an example of using Fourier transforms to extract information from a frame, an azimuthal intensity profile of the spiral galaxy A0526--16 is shown in Figure . ...

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• Background estimate by filtering
• Estimating the Sky Background
• First Catalog Sources Not in the Second Catalog

... Mars to Appear Normal this August . ... October is the best month to see Mars this year. ... As Earth catches up to Mars in their respective orbits around the Sun, Mars will keep rising earlier in the night. On 2005 October 30, Earth will have caught up to Mars and the planets will be the nearest to each other in their orbits -- this time around. On October 30, Mars will be nearly opposite to the Sun, rise at sunset, set at sunrise, and appear highest and brightest around midnight. ...

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• Jelly Donut Shaped Rock Appears on Mars
• Астронет > Mars to Appear Normal this August
• Moon and Planets Over Catalonia

... 2005 August 8 . Mars to Appear Normal This August . ... Regardless of numerous urban legends circulating, Mars will appear relatively normal in August. October is the best month to see Mars this year. ... As Earth catches up to Mars in their respective orbits around the Sun, Mars will keep rising earlier in the night. On 2005 October 30, Earth will have caught up to Mars and the planets will be the nearest to each other in their orbits -- this time around. ... About APOD | ...

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• APOD: 2012 February 29 - Moon and Planets Over Catalonia
• APOD: 2014 January 29 - Jelly Donut Shaped Rock Appears on Mars
• APOD: 2010 November 29 - Dark Belt Reappearing on Jupiter

... There are several explanations for these X--ray quiet PMS stars. To examine the explanations, it is proper to divide the PMS stars into three groups: those bluer than R - I = 0.7, those redder than the X--ray sources (R - I > 1.25) and those with colors similar to the X--ray sources. ... A total of 26 of the non--X--ray detected PMS candidates had spectra taken. ... Between V=14 and V=16, I find 25 stars which are X--ray sources and estimate 19 non--X--ray PMS stars. ...

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• The AstroStat Slog Blog Archive [ArXiv] Sparse Poisson Intensity Reconstruction
• The AstroStat Slog Function Estimation
• Chandra Supernova Remnants Catalog - Instrumental Artifacts

The red colors in this image show the galaxy M66 as it appears at the submillimeter wavelength of 850 microns, while the white background shows the galaxy as it appears in visible light. Regions of cold dust that appear as dark streaks in the white image glow brightly in the red image. ...

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• Why do some stars appear to flash a variety of different colors when you look
• Can you explain Mercury's retrograde motion? Do other planets appear to do this
• Why do the constellations and the Moon appear upside down from the Southern

... Data Reduction FAQ > The reduced science spectrum displayed in the Reflex window appears good but when I try to plot it, it is quite different. How can I get it? ... Observing with ESO Telescopes . ... ESO-MIDAS . ... Reflex . ... ESO Data . ... ESO HST Image Galleries . ... ESO Data Access Policy . ... ESO Science Newsletter . ... ESO Annual Reports . ... Seminars at ESO Santiago . ... Seminars at ESO Garching . ... ESO Telescope Bibliography . ... Last Update: 01.04.14 ESO . ...

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• The stage and the plot
• Circinus Galaxy before and after SN 1996cr appeared | ESO
• ESO - While using Reflex I cannot see a spectrum in any of the three windows

. Album : Фотоальбом Сергея Аюкова :: Travels to distant places and countries :: 1997/08 Japan (Kyoto, Nara) :: 17/08 Kyoto streets. Maruyama park . Up . << Prev . Dreaming about things on display. After checking, they appeared to be not that tasty compared to how they look. Next >> . Created with the tool album generator from David's MarginalHacks on Wed Jun 5 20:38:34 2013 .

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• Long description of example illustrating the separated borders model
• COMPLEX DATA ANALYSIS
• Jacques Lewalle

... PmWiki . Summary: PmWiki group header. ... Summary: Styling text for colour and other attributes:) See also Wiki Styles Plus and Wiki style colors . ... PmWiki 2.0 introduced the ability to control the styling further and to even place styles on blocks. ... This text is %color=red% red, %color=blue% blue, %% and normal (black). ... 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. ... Group . ...

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• Duchamp Source Finder
• VLBI Wiki | PmWiki / WikiStyleExamples
• ATNF Daily Astronomy Picture

Astronomy Discussion Forums . ... Atm ћ Astrophotography ћ Blackholes ћ Blackholes2 ћ CCD ћ Celestron ћ Domes ћ Education . ... New Model: How Do The Sun And Moon Appear To Move Across The Sky . ... Post Message | ... focused on the Sun and the Moon as they appear from the given location of the Earth surface: . ... www.astronomy.net . About Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

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• Teleportation - an Astronomy Net Gravity Forum Message

With the Phase I CGPS now complete at 21cm, we are in a position to examine the population of cold H I clouds over the entire range of the survey. Current methods of H I self-absorption (HISA) identification and analysis allow us to explore the properties and distribution of the portion of cold H I which appears as HISA shadows in the 21cm line data. Such studies are necessarily biased toward clouds with bright background emission. ...

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• What is HISA?
• Hydrogen Shadows in the Galactic Sky
• Dark Hydrogen in the Galactic Plane

In 2001, Westerbork observations of the disturbed galaxy named VV-29 (alias Arp-188, UGC-10214) showed that there is second smaller galaxy (named VV-29c) that appears behind the western side of the main body of the distorted galaxy. ... The galaxy was featured as the May 2, 2002 Astronomy Picture of the Day . ... When VV-29 had its 15 minutes of fame in May 2002, it appeared under the name "The Tadpole Galaxy," but based on the images above, we will always think of it as "The CHAINSAW"! ...

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• Giant Galaxy String Defies Models of How Universe Evolved
• What’s this got to do with velocities?
• Pink Black Holes: Technical Details

The TSpec SlitViewer window controls the TripleSpec slitviewer. Most of the controls are standard guiding controls . ... Bkgnd Sub status and control of automatic background subtraction: . The first field shows the current state (Off or On). Off turns off background subtraction. On / New turns on background subtraction (if off) or takes a new background image (if on). X cancels the current Off, On or New command. ... This field is only visible when background subtraction is on. ...

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• TPM log files

... Circumstellar disc of beta Pictoris: constraints on grain properties from polarization. To appear in the Astronomy & Astrophysics . abs , src , ps ] . ... Dust influx to Titan from Hyperion . ... abs ] . ... Characteristics of bulges and disks in interacting galaxies . ... Dust grains around Herbig Ae/Be stars: porous, cometary-like grains? ... To appear in the Astronomy & Astrophysics Supplement . ... Finally, Links may lead you to more options (e.g. via the LANL preprint system). ...

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• Perturbation method

. Inbound . Outbound . AE8 . Previous slide . Next slide . Back to first slide . View graphic version .

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• Description
• XMM-Newton Further EPIC Background Scripts

spaceweb@oulu.fi - last update: 18 February 1997, 1100 UT (RR) . Black aurora is a lack of auroral emission in a small, well-defined region within an otherwise uniform, diffuse background or within auroras exhibiting a degree of shear behaviour intermediate between that of diffuse and discrete aurora (e.g., Davis, 1978). It appears to be a common feature of the midnight sector during late substorm recovery phase (Trondsen and Cogger, 1997). ... 30 , 371-380, 1978. ... 102 , 363-378, 1997. ...

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• Template
• Comet Introduction
• The Nine Planets Copyright Information