... 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. ...

The following are some standard questions that observers have about their fixed target confirmation charts. ... Why doesn't my target appear to be centered on the cross hairs? ... How is proper motion handled? ... Target well centered . If your target is not perfectly centered in the cross hairs, see the questions below for why it may not be centered and how well centered it must be . ... So, targets to be acquired by STIS should appear well centered in the cross hairs on the confirmation chart. ...

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"! ...

... Hopkins: The Phoenix Deep Survey at 1.4 GHz . ... For details of the Phoenix multiwavelength deep survey, refer to MNRAS 296, p839, 1998. ... We present the first results from the Phoenix Deep Survey, a multiwavelength survey of a 2 deg diameter region. Observations in the radio continuum at 1.4 GHz carried out with the Australia Telescope Compact Array are described. The catalogue of over 1000 radio sources compiled from these observations is analysed, and the source counts are presented. ...

... 30, 2006 . ... If you retrieve these files via a Web browser, please note that you need to use the browser's "Save As..." facility. ... Figures must be provided as Encapsulated PostScript files and should be incorporated in your contribution using the standard Latex2e "graphicx" package as demonstrated in the demo file author.tex. ... Please submit the LaTeX source file of your contribution, and PostScript/PDF files of any figures, via email (!!!) to Iris Bronnert ( ibronner@eso.org ). ...

... First Level Heading (please use initial caps) Type text here. Please notice first paragraph is not indented. ... Another First Level Heading Second Level Heading Another first paragraph, not indented, using "ASP_section_para_1" style. ... Sample Figures and Tables Figures Figures may be inserted into the text using either a blank placeholder followed by a caption, as in Figure 1, or by embedding the figure into the document. ... Please use the "ASP Acknowledgements" styles for heading and text. ...

These are very prominent absorption lines is most all galaxies. ... These pair of absorption lines will appear in all the spectra and they should be your principle source for determining the redshift. ... When this applet opens you will see an iconic representation of galaxies in the left hand side of the applet and a target area in the right side of the applet. ... Note: What you are doing in this excercise is identical to what Hubble did in the 1920's and you are using the same galaxies. ...

... Subject: FRIDAY'S FANTASTIC FIREBALLS . ... If anyone saw the major fireballs which appeared over Ireland (andб parts ofб GB) at about 22.55 BST on Friday 21 September, please quickly send as much detail as possible of your observation to me, and to Armagh Observatory, at jmf arm.ac.uk . ... PLEASE GIVE AS MUCH OF THE FOLLOWING DETAIL AS POSSIBLE: . ... Approximately what angle above the horizon were the fireballs when you first saw them? ... Please describe any colours that you saw. ...

... Changes in Angular Mars . ... 14.07.2008 . ... As both Earth and Mars orbit the Sun, the apparent angular size of Mars changes as viewed from the Earth. Pictured above from Enschede , Holland , Mars was captured in 2007 and 2008 with 30 separate images, all taken with the same magnification. ... NASA Web Site Statements, Warnings, and Disclaimers . ... Publications with keywords: Mars - angular size . Publications with words: Mars - angular size . ... A Mars Panorama from the Phoenix Lander . ...

... Registration Form . Please complete and return this form (even if you sent the pre-registration form) . ... Odessa Astronomical observatory Telefax : 380 482 229442 . Park Shevchenko E-mail : astro@te.net.ua 270014, Odessa-14 (Ukraine) . NAME (to appear in the badge) :.. ... LaTeX template . ... begin{document} . begin{center} . ... end{center} . ... please insert a figure, if needed. % please name Your files as "Your_name1.pcx" rather than "Odessa1.pcx" . ... begin{figure}[h] . ...

... Roger Ritenour Title : Earth Filename : Earth.wad Author : Roger Ritenour Emale Address : ritenour@mail.comet.net Description : Ten level episode replacement for first episode of Hell on Earth. ... Play Information * Episode and Level # : Map01-Map10 of Doom II Single Player : Yes Cooperative Player : Yes (untested) Deathmatch : Yes (untested) Difficulty Settings : Yes, full range, all settings are slightly more difficult than standard Doom settings. ...

... 2006 October 15 . An Orion Deep Field . ... Explanation: Adrift 1,500 light-years away in one of the night sky's most recognizable constellations , the glowing Orion Nebula and the dark Horsehead Nebula are contrasting cosmic vistas. ... The magnificent emission region, the Orion Nebula (aka M42), lies at the upper right of the picture. ... Fainter tendrils of glowing hydrogen gas are easily traced throughout the region in this Orion deep field . ... About APOD | ...

ISSN 0236-2457 . Sincerely yours . Georgij Rudnitskij . Editor-in-Chief . gmr@sai.msu.ru . visit since March 12, 2010.

General Forum Message . Forums: . ... Deep Space Object Galaxy Near M13 . ... Can anyone tell me if there is a DSO (likely a galaxy) near M13? ... The reason it interests me is that I drew a sketch of M13 years and years ago while observing - and that object is one of the handful of 'stars' that I drew. ... 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" . ...

... The calculator on this page allows you to calculate the angular separation of two sources in the sky using the corresponding equation derived on the Spherical geometry page. JavaScript must be enabled for the calculator to work. ... Source 1 / l : / b : . ... Note: the allowed format of right ascension / longitude is hh:mm:ss.s , hh mm ss.s , or d.d , while the format of declination / latitude is dd:mm:ss.s , dd mm ss.s , or d.d . ... 2016 Tobias Westmeier Contact | ...

... Tonight's Sky . ... Sky this Month . ... Star Atlas . ... stars . ... The Sky This Week: April 1 - 10 . ... Observing springtime deep-sky objects with a large telescope . ... Why do some stars appear to flash a variety of different colors when you look at them through a telescope? ... So, Earthт??s atmosphere will bend some colors from especially bright stars more so than others, which makes the source look like itт??s flashing colors. Get instant access to subscriber content on Astronomy.com! ...

Welcome to the Everyday Classroom Tools curriculum, Observing the World Around Us, which takes its form in The Threads of Inquiry. Before you begin, you will probably like to know how to use the Threads, what they will look like, and what resources are contained in their text. ... It pinpoints the scientific motivations for this Thread, or why it is important for students to understand what is happening around them with regards to the Thread topic. ... the Threads, and additional button . ...

... Given the functions (sin a , cos a , sin b and cos b ), we seek formulas that express sin( a+b ) and cos( a+b ). ... As shown in the drawing, to derive the formula we combine two right-angled triangles . ... AB = AC cos a = R cos b cos a The triangle ADF is right-angled and has the angle ( a+b ). ... Each of them is one of the two sharp ("acute") angles in its own right-angled triangle. ... In the right-angled triangle CED DE = DC cos a = R sin b cos a . ... cos ( a+b ) = cos a cos b - sin a sin b ....

General Information . ... Local Information . ... The city represents great cultural value because in the late 19th and early 20th centuries, Kislovodsk as a fashionable spa attracted many musicians, artists, and members of the Russian aristocracy. ... Double room with full pension (breakfast, lunch, dinner) - 2620 rubles per person per night. solnechniy . ... Citizens of most countries need visa to enter the Russian Federation. ... Victor Kornilov, Sternberg Astronomical Institute (chair) . ...

... In the usual case that the image dimensions are hundreds of pixels, colimplot can take quite a while to run if a pgplot output is selected. ... So, to rebin the intermediate image to 40 in the x direction by 50 in y, use the following values: rebinimage=yes rebinstyle=tonumber newnxbins=40 newnybins=50 If, on the other hand, you wish to rebin by dividing the number of x pixels by 3.3 and the number of y by 10, use the following values: rebinimage=yes rebinstyle=divideby dividexby=3.3 divideyby=10 . ...