... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2004 August 5 . Emission Nebula IC 1396 . ... Explanation: Sprawling across hundreds of light-years, emission nebula IC 1396 mixes glowing cosmic gas and dark dust clouds . ... The filters actually block out most of the light ... but narrowly transmit wave lengths characteristic of specific glowing atoms in the nebula. ... About APOD | ...

Astronomy Picture of the Day . Emission Nebula IC 1396 . ... 5.08.2004 . ... Credit: Richard Crisp Explanation: Sprawling across hundreds of light-years, emission nebula IC 1396 mixes glowing cosmic gas and dark dust clouds . ... Emission from sulfur atoms is shown in red, hydrogen atoms green, and oxygen in blue. ... August . ... August 2004 . ... Publications with keywords: emission nebula - star formation - hydrogen . Publications with words: emission nebula - star formation - hydrogen . ...

Permitted Context: SELECT . ... The OPTION element can only occur within a SELECT element. ... When the form is submitted, the NAME of the enclosing SELECT element is paired with the OPTION's VALUE attribute to contribute a name/value pair for the selection. ... CLASS . ... The string to be used together with the name attribute of the enclosing select element, when submitting the form. ... SELECTED . ... This attribute is used within menus to define shaped hotzones associated with this option's value. ...

... The active time at each angular bin is the sum over frames of the active time contributions from all CCD pixels, within the node-specific telemetry window, which overlap the surface of the bin. ... The active time, per frame, of a normal pixel is the full frame integration time multiplied by the node-specific fractional exposure; bad pixels contribute no active time. ... If an event is rejected for this reason only, then its pixels remain normal in the exposure map. ...

This page elaborates on the previous example which discussed the use of color maps in connection with Ggi plot fields. ... How this can be done will be shown in a later example. /* example8.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 ...

Next: Armagh Observatory New TSN Up: G. New TSN Action Previous: What We Do Contents . ... The Armagh Observatory seeks to develop this interest by disseminating the results of its scientific research through a programme of public outreach and public understanding of science (PUS). ... partnership with groups and institutions having similar aims and objectives, for example the Astronomical Science Group of Ireland and amateur astronomy organizations; . ...

... Default = -30 (Lick) ; OUTPUTS: ; ; HISTORY: ; Began 2004-08-26 17:34:39 by Marshall Perrin ; 2005-07-11 / overplot option added. ; 2005-07-12 color handling improved ;- PRO allskyplot,filename,_extra=_extra,label=label,usecolors=usecolors,ps=ps,$ overplot = overplot , color = color , declimit = declimit ,$ database=database ; NOTE: use / color to plot survey status from haebes.lst if ~( keyword_set ( declimit )) then declimit =-30 if ...

... June 25, 1996 . A Star Forming Region in the LMC . ... Explanation: Stars sometimes form in colorful ways. Pictured above is a small region in the nearby LMC galaxy where stars are forming. ... It may develop a strong wind which pushes away nearby gas ; it may be so hot and intense that emitted light boils away nearby dust and gas , and it may be so massive that it soon goes supernova and catapults its elements back to the interstellar medium . ... About APOD | ... Specific rights apply. ...

... Comparative study of Tl-2201 single crystals with different temperatures of superconducting transition by means of specific heat method. Abstract: . The comparison studies of the specific heat of Tl-2201 single crystals with the different oxygen concentration have led to the conclusion that the doping by oxygen, resulting in lowering of T c and increasing of number of paramagnetic centers, leads to diminishing of antiferromagnetic correlations contribution to the specific heat. ...

The Mars Flag has a different design on the reverse side. obverse side of flag . ... The orbit lines on the obverse cross the Sun on the lower half of the flag and appear to go behind the Sun on the upper half of the flag. The reverse side has the orbits lines continuing around the Sun on the upper half of the flag. ... The Mars Flag reverse side is a continuation of the obverse side and not just a different design on the back and not a mirror image of the obverse. Main Flag Background Color . ...

... Does the time it takes different methods to create all the elements coincide with the universeт??s accepted age? ... Illinois Urbana-Champaign) Different kinds of stars create elements at different rates, all of which are consistent with the age of the universe. Get instant access to subscriber content on Astronomy.com! ... Registration is FREE and takes only a few seconds to complete. If you are already registered on Astronomy.com, please log in below. ...

... Colors of Sunlight . ... Isaac Newton showed that not only can a triangular prism separate a beam of sunlight into rainbow colors (that had already been known), but also that, when a second prism brings the different colors together again, white light is once more obtained. Therefore white light is a combination of all the rainbow colors, and the prism separates its colors because the angle by which a beam of light is bent, when it enters glass, differs from one color to the next. ...

This is a color composite image made by Karen Gloria at Hopkins Observatory using a 6-inch refractor and a 512x512 element CCD detector. ... This is a planetary nebula (see also the Planetary Nebula page on this server). It is relatively small, measuring approximately 8x4 arcminutes. Overall, the surface brightness of the extended ionized gas emission is one of the highest for any PN and therefore this object is easily seen through even small telescopes (including most finders). ...

... 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 . ...

Weaving together Astronomy+Statistics+Computer Science+Engineering+Intrumentation, far beyond the growing borders . ... Archives . ... People . ... To my personal thoughts, the history of astronomy is more interesting than the history of statistics. ... Quintessential Contributions: . ... The contents are only spanned about 100 years and there are great chances that my mind still favors the history of astronomy over the history of statistics. ... Comment ( RSS ) | ... Entries RSS . ... Chandra Blog . ...

Physicists have been honored by having their picture on currency in many countries around the world. ... Marie and Pierre Curie (Marie: 1867-1934, Pierre: 1859-1906) appear on the French 500 franc note. ... The greatest physicist of this century, Einstein not only invented the theories of special relativity (behavior of rapidly moving object) and general relativity (theory of gravitation), but made fundamental contributions to the beginnings of quantum theory. ... For a bio, click here . ... 100 K) . ...

... Despite the wide spread use of the terms MTF, CTF, limiting resolution, minimum resolvable target, and contrast to describe CCD image system quality, the terms are often misused and their relations are little understood. ... The modulation transfer function (MTF) is a Fourier transform of the line spread function i.e. its equivalent as an integral sum of sine waves taken over the whole range of spatial frequencies. MTF by its Fourier nature can only be used to operate on sinusoidal frequencies. ...

Railroad Tycoon (RRT) Frequently Asked Questions (FAQ) Compiled and Edited by David Mitton Rev 1 Draft 9-Feb-1994 Scope & Disclaimer: Not a complete treatis on RRT or RTD. ... Microprose information - Game Limitations (README.DOC) - Known Bugs - Version info - Hints and Strategy books - "The Computer Cheats!" ... Read the Tech Supplement - Why only 32 stations? ... Railroad Tycoon (RRT) and Railroad Tycoon Deluxe (RTD) are exciting strategy games of empire building, operation, and market manipulation. ...

... Connecting the planned observations and the actual status of the Chandra X-ray Observatory is the observation interval determination pipeline ( OBIDET ). This collection of tools allows the Chandra X-Ray Center Data System automated processing to process the data through the necessary pipelines based on what was actually observed. ... In the case of the Chandra X-ray Observatory, the observation interval determination pipeline ( OBIDET ) is used for this task. ...

This page will contain definitions (and basic references) of the following parameters: . cross-sections C ext , C sca , C abs , C bk ; . efficiencies Q ext , Q sca , Q abs , Q bk ; . ... TE/TM mode definitions for arbitrary shapes. Note that some parameters are defined in a quite different (specific) manner than for spherical scatterers, and some definitions in the book of Mishchenko et al. ...