... 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. ...

SAOtng supports multiple frame buffers, so that more than one image can be loaded simultaneously. ... Users of the old SAOimage program are used to having the frame size adjust itself as each new image is loaded. ... To specify autoconfigure of frame #1, use the -autoconfig switch or the SAOTNG_AUTOCONFIG environment variable. ... When a frame size is specified manually, auto-configuration is turned off so that new images also use the specified frame size. ... Disable/Enable Autoconfig of Frame #1 . ...

... The task also issues a number of housekeeping related messages and values and also writes several keywords to the EXPOSURE extension (the information is usually CCD-dependent and it is thus important that it is kept and propagated through the event file processing chain). ... Filter: the filter wheel position is derived from the position sensor potentiometer (housekeeping column F1122 contained in the main periodic housekeeping file PNPMH1 , HK mnemonic H_CE_FWSPOT). ...

To construct frequency distribution (histogram) of minor planets according to value of some element/ parameter/ function user should first select Elements item in menu bar and then Histogram in drop-down menu. ... User has possibility to save histogram or to print it using standard means. To save the file select File item in menu bar and then Save As... in drop-down menu. ... To print histogram select File item in menu bar and then take advantage of options Print Preview , Print Setup , Print . ...

... Because of the need to schedule observations as efficiently as possible, the order in which exposures are executed may be different from the order in which they appear in the observer's Phase II submission-unless an explicit special requirement dictates otherwise. ... Data files can then be associated with the corresponding exposure line in the Phase II proposal by comparing exposure information in the Phase II proposal with data file header keywords. ... Time_Per_Exposure . ...

... Therefore, the menu location # "Blur/Blur" specifies an item name of "Blur" in a submenu entitled # "Blur". ... It is convention to only use the `alt' and `shift' key modifiers for # plug-ins. ... The main application will not use the ` alt ' # or ` shift ' key modifiers. plug-in blur Blur / Blur Alt Key B Alt +B plug-in gauss Blur /Gaussian Blur Shift Alt Key B Shft+ Alt +B plug-in gauss_rle Blur /Gaussian Blur RLE plug-in gauss_recurse Blur /Gaussian ...