... An Orion of a Different Color . ... It is a familiar object though, the grand stellar nursery known as the Orion Nebula . But the striking picture combines images taken through three separate filters, each designed to record different emission lines - light from Sulfur, Oxygen, and Hydrogen atoms glowing in the tenuous nebular gas. At such low densities , Sulfur and Hydrogen atoms emit red colors while Oxygen glows green. ... Publications with keywords: Orion Nebula . ... The Heart Of Orion . ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2004 March 25 . An Orion of a Different Color . ... But the striking picture combines images taken through three separate filters, each designed to record different emission lines - light from Sulfur, Oxygen, and Hydrogen atoms glowing in the tenuous nebular gas. ... About APOD | ... NASA Web Site Statements, Warnings, and Disclaimers . ...

... 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! ...

... branch tape US ARMY . ...

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... As an experiment, I made some three-color images of Messier 42, more commonly known as the Great Nebula of Orion. ... green enhanced . ... halfsize or fullsize . ... Each image is a ``true color'' composite of three monochromatic images, in which the red, green, and blue intensities each correspond to the intensity of one of the original images. ... The HST image is assembled from different filters than mine: red is Nitrogen [II] at 6583 , green is H-alpha at 6563 , and blue is O [III] at 5007 . ...

... Bad Astronomy . ... Mad Science . ... Are colored dwarfs actually colored or are they different kinds of stars? ... Therefore a white dwarf is very bright, and a brown dwarf is very dark. ... Brown dwarfs are a newly discovered type of object, which are midway between stars and planets. ... Several brown dwarfs have been recently discovered orbiting normal stars; you can find more about them at one of my favorite web sites, The Nine Planets , on the page called "Other Solar Systems?" ...

... For detailed information about the use of color maps, please consult the appropriate PGPLOT documentation: for instance pgscr.dc2 and pgscir.dc2 to start with. ... example7.c -XT */ # include stddef.h # include math.h # include gipsyc.h # include cmain.h # include init.h # include finis.h # include userfio.h # include pgplot.h # include ggi.h #define ROWS 100 /* number of image rows */ #define COLS 100 /* number of image columns */ #define NCI 50 /* number ...

PROJECT 01- BUTTERFLY COLOR 100 pts PROJECT DESCRIPTION Use the given photo of a butterfly parts of the photo. ... You don't have to use areas of color. Your image will be (details!), your choice of colors, and the image. Photoshop: Make sure that you are not coloring the background layer, remember to make good selections, apply color to selections or apply color to the layer with a brush, and use the blending mode to change the properties of the color on the target layer. ...

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home education > activities . ... Quick math activity that asks students to calculate scale models of a binary star system with a black hole in it. [h] . ... Students use a radiometer and a light bulb with a dimmer switch to make connections between the temperature, color, and radiation output of a star. ... This demonstration, similar to the above, from the Exploratorium Snack-book of science activities, lets students demonstrate how molecules scatter light and change the colors of the beam. [m,h] . ...

... The Chilled 3-chip Color CCD Camera C5810 was developed to provide real color imaging in low light level conditions. This camera incorporates 3 CCD chips coupled to a trichromatic beam splitter that reproduces real colors at all microscope intensities. ... Peltier elements are used to cool the CCDs to reduce thermal noise to minimal levels while fixed pattern noise such as illumination shading and any remaining thermal noise can be removed with the built-in image subtraction feature. ...

... MATERIAL: astronomical data visualization software like ds9 , IRAF, and the two galaxy images in the V-band and I-band . ... You received images in the V and I-band of an unknown, partially resolved Milky Way dwarf satellite galaxy. Your task is to generate a color-magnitude diagram (CMD) of this stellar system, find out what kind of stellar population it is made of (old, young?) and estimate its distance from the sun using well-known features identified in the CMD. ...

psscale - Create grayscale or colorscale for maps psscale -D xpos / ypos / length / width [ h ] [ -B tickinfo ] [ -C cpt _ file ] [ -E [ length ] ] [ -I [ max _ intens ] ] [ -K ] [ -L ] [ -N dpi ] [ -O ] [ -P ] [ -U [/ dx / dy /][ label ] ] [ -V ] [ -X x - shift ] [ -Y y - shift ] [ -Z zfile ] [ -c copies ] psscale plots grayscales or colorscales on maps. Both horizontal and vertical scales are supported. ... Append h to get a horizontal scale [Default is vertical]. ...

... We describe a tool in the PCIPS environment for finishing the job of globular cluster photometry started by DAOPHOT II: starting with the instrumental magnitudes derived by DAOPHOT II, DASHA can automatically produce final color-magnitude diagrams. ... DASHA can automate the whole process of globular cluster photometry, from instrumental magnitude lists produced by DAOPHOT II, to final color-magnitude diagrams. ... DASHA is oriented towards star lists produced by DAOPHOT II as source data. ...

... Please note the following problems and workarounds: . ... Arrow keys . Arrow keys are used in SAOtng to move the mouse or markers. ... Unfortunately, error messages are generated if both sets are defined in the SAOtng code but are not supported by X. To get around this problem, we have added the -kbprefix command switch (and the SAOTNG_KBPREFIX environment variable) to SAOtng. This switch allows you to specify which arrow keys you want to use (assuming your version of X supports both). ...

... Armagh Observatory 2001 July */ #declare Shining_Dwarf_Core = sphere{ 0,0,0 , 0.99 hollow on interior{ media{ absorption rgb 0.0 , 0.0 , 0.0 scattering { 5 rgb 1.0 , 1.0 , 1.0 eccentricity + 0.1 } density { spherical color_map{ [0.00 rgb 0,0,0 ] [ 0.05 rgb 0.1 , 0.1 , 0.5 ] [ 0.2 rgb 0.2 , 0.2 , 0.6 ] [ 0.5 rgb ...

... It lists the coefficients defining the colour transformations, the zero points for the different filters and the aperture radii used in the photometric calibration analysis. ... The AB system zero point of the filter FilterID is stored in the keyword ABM0 FilterID , e.g. the AB zero point of the the U-filter is stored in ABM0U. The flux conversion factor derived from White Dwarfs of the filter FilterID is stored in the keyword FCF FilterID . ... description . ... AB Flux conversion factor of U . ...

These observations are aimed at fully charactering FORS1 photometric system (UBVRI zero-points, color-terms and extinction coefficients) for the Tektronix 2048x2048 pixel CCD (24µm px) . To this aim, the two Landolt/Stetson photometric fields SA95 and SA101 will be observed on a number of epochs and at different airmasses during February and March 2007. ... SA101 . ... OBs for SA101 have to be observed during evenigh twilight (exceptions are expected for the second half of March) . ...

... Description . Catalog . ... In the Catalog, we publish equatorial (ЮБ 2000 , ЮД 2000 ) and galactic (l,b) coordinates of cluster centers derived as the position of overdensity in 2MASS catalog (Koposov et al. ... Distances, color-excesses and ages are the mean-square values calculated using all available evaluations from different color-magnitude diagrams. ... There are individual pages for every cluster where all available plots and parameters are published. ... 2002). ...