... This program was created for correlating chosen regions in the series of fts images. ... Chosen regions' . ... In this section the program counts the integral for each region of the grid for each image. ... As a matter of fact, the integral is total brightness of the region and it is counted by 'int_tabulated' IDL function. ... In addition, the program will show the count of the regions which correlate with the corresponding region (the brighter region means the bigger count) and its contour. ...

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... Brain Crater on Mars . ... What caused this unusual looking crater floor on Mars? ... Comet NEAT (Q4) Over Indian Cove . ... Comet NEAT (Q4) was quite photogenic earlier this month. Although the head and part of the tails of Comet C/2001 Q4 (NEAT) were visible to the unaided eye, the best views of the colorful tail were revealed only later by cameras able to expose for long periods. NGC 3372: The Great Nebula in Carina . ... Venus: Earths Cloudy Twin . ... Endurance Crater on Mars . ...

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... The TRACE images may be used without restrictions in publications of any kind. ... These two images, taken on 18 November 2000 at 15:54UT and 16:11UT, respectively, show such an event: the red circle in the image to the left shows a region where many loops are cooling, with bright loop tops (the intensity scales with the square root of the image to reduce the dynamic range). ... See also a collection of images related to the Sun, other cool stars, and solar-terrestrial effects . ... Images | ...

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• Martian Clouds
• Arcetri Star-Formation Group Publications

... 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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• Phil Plait's Bad Astronomy: Misconceptions
• Phil Plait's Bad Astronomy: Bad News

... 227Wink This paper containes an investigation of 91 sources which appear to be point sources when observed with the angular resolution of the 100-m telescope at 4.9 GHz, teta_a = 2.6', and which we expected to be HII regions. The basic search list was prepared from the 4.9 GHz survey of the galactic plane by Altenhoff et al. ... In the present paper we list 4.9 GHz flux densities only for sources for sources for which we present new observations. ... source structure indicated . ...

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• A 1.4 GHz Survey in the Southern ELAIS Region
• A 10-GHz Radio Continuum Survey

Galaxies are diffuse objects which are imaged against a background of finite brightness and noise. Galaxies which have the maximum contrast with respect to this background are the ones that are first discovered. ... These galaxies have been missed to date but active surveys for them are underway. ... In this page we present several examples of these newly discovered Low Surface Brightness galaxies as well as examples of high surface brightness galaxies. ...

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• Astro-2 and the UIT Experiment
• The Galaxy Gallery Page 6: Comparative Morphology

... region (region-7.5) [xmmsas_20041122_1834-6.1.0] . Meta Index / Home Page This section documents the parameters recognized by this task (if any). Parameter . ... Reference event file used to define the coordinate system for the source and background regions. ... If operationstyle =`single', the task looks in this parameter for the row number of the source list ( after the list is filtered via expression ) for which to construct source and local-background event-extraction regions. srcidcol . ...

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• The contour method of calculating source region shape

There is often dust associated with ionized regions. Compact HII regions usually have associated dust from a molecular cloud in which the massive star is being "born". ... For such stars the dust is not produced by the star, and a variety of dust features are observed. The planetary nebulae also usually have associated dust from the previous stage of evolution where they were either carbon stars or M-type giants. ... The feature near 11.5 microns in the IC 418 spectrum may be due to SiC dust. ...

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• WFPC2 Bright Star Avoidance Regions
• Unusually bright 12CO(3-2) condensations in the tidally perturbed Small
• Initial Hypotheses

Starbursts are regions of enhanced star formation efficiency, where gas is being converted into stars at much higher rates than can be sustained over billions of years. ... A nice example in the southern sky is the nearby galaxy NGC 7552, which was imaged with the Compact Array at 3 cm by Forbes et al. ... On 9 May we re-observed this galaxy with the Compact Array in the 3-mm lines of HCN and HCO + . ... The two lines were observed simultaneously, allowing a direct comparison of their line strengths. ...

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• The giant HII region NGC 3603
• An investigation of the molecular clouds of the Carina HII region/molecular
• NGC 1808

... Mystery flare , from Terry Moseley: . While observing a pass of the ISS tonight (now last night, July 10!) ... It was in the general region of Gamma Ophiuchi, although the sky was too bright, with too few stars visible, for me to get an accurate position. AHA, you'll say - an Iridium Flare! ... BUT - they usually appear in roughly the same quadrant of the sky as the predicted flares, since the Sun-Earth-Satellite angle is similar. ... International Year of Astronomy, Ireland National Node . ...

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• Armagh Observatory
• Terry Mosely's Bulletins
• Coronal Bright Points: Another Oscillating Environment

... 2014 April 14 . An Unusual Globule in IC 1396 . ... Known to some as the Elephant's Trunk Nebula , parts of gas and dust clouds of this star formation region may appear to take on foreboding forms, some nearly human . ... Energetic light from this star is eating away the dust of the dark cometary globule near the top of the above image . Jets and winds of particles emitted from this star are also pushing away ambient gas and dust . ... About APOD | ... A service of: ASD at NASA / GSFC . ...

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• APOD: 2002 March 25 - An Unusual Globule in IC 1396
• APOD: 2003 October 19 - An Unusual Globule in IC 1396
• APOD: 2008 September 24 - Active Region 1002 on an Unusually Quiet Sun

2009-05-20 O.Hainaut There are many steps between the data coming out of a camera on a professional telescope and the final image that appears in magazines or on our web sites. ... preliminary: from the telescope to Photoshop. cleaning: remove the artifacts remaining in the image . ... In each filter, several images are acquired. ... Fig 1: a raw image (click for full scale) . ... At this stage, the images are still in FITS, the astronomical format, with one FITS file per filter. ... The final image. ...

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• Synthetic Star Forming Region HRDs
• A close look at the sky around the star formation region RCW 106 | ESO
• AdelePlunkettAstro

... BLUE STRAGGLER STARS are unusually hot and bright stars found in the cores of ancient star clusters known as globulars. ... BACKGROUND (from wikipedia): Blue straggler stars are stars in open or globular clusters that are hotter and bluer than other cluster stars having the same luminosity. ... There is evidence in favor of this view, notably that blue straggler stars appear to be much more common in dense regions of clusters, especially in the cores of globular clusters. ...

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• C/2006 P1 (McNaught)
• The Milky Way in the region of the Southern Cross (Crux) and Centaurus rising
• Siding Spring Survey

I-GALFA View of a Galactic Tangent Region . ... Image featured in NAIC Newsletter #46 . I-GALFA image of hydrogen gas in a tangent region outside the Sagittarius arm. ... Because we are viewing this gas in a direction closely aligned with (tangent to) its orbital motion, it appears to be moving away from us (we are orbiting the Galactic center with a similar speed, but our own motion in a different direction). ... The gas near 60 degrees longitude is being viewed tangent to its orbital motion. ...

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• What is HISA?
• HISA Science Overview
• First Galfa H I Map

True Color Image Gallery: Galactic SNR | Magellanic Cloud SNR . ... Chandra Proposer's Guide pile up section ] During frame readout, the ACIS CCDs take 40 microsec to (parallel) transfer the charge by one pixel. As a result of this, each frame readout, each pixel is exposed for 40 microsec to a source (plus cosmic X-ray background) at each location along its column. ... Note also that the image does not just trail, it extends along the whole column. ... Chandra Supernova Remnant Catalog . ...

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• *pllist* - Look at the region
• Regions and Source Parameters
• Chandra Images for J0454.4-6713

... LMC Project Outline . NGC 1818 Initial Results . ... The Large Magellanic Cloud (LMC) is uniquely suitable for the study of massive star clusters at all stages of evolution. By combining HST observations of these clusters with N-body models we hope to understand the origin and evolution of rich star clusters in our own Galaxy, in the LMC, and beyond. ... We aim to combine our HST observations with N-body models to understand the formation and evolution of globular clusters. ...

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• Unusual Emission near a Compact Source in Orion
• Some Experiments with the Restoration of NICMOS Camera 2 Images of OMC-1
• The Old Stellar Population of NGC 1569 from NICMOS data

... Top Attractions of Russia . ... We sincerely hope the situation will improve and we are planning to include these regions as soon as it becomes possible. ... Southern Urals (including Bashkir State Reserve) . ... Eastern Sayan Mountains (including Tunka Range) . ... Altai Mountains (including Lake Teletskoe, Altai State Reserve, Katun Range) . ... Sub-Polar and North Urals and virgin forests of North of European Russia (including Yugyd-Va National Park and Pechora-Ilych National Reserve) . ...

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... Tonight's Sky . ... Star Atlas . ... stars . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... An anarchic region of star formation captured . ... RELATED TOPICS: STARS . The star formation region NGC 6559. ... The Danish 1.54-meter telescope located at the European Southern Observatory (ESO) La Silla Observatory in Chile has captured a striking image of NGC 6559, an object that showcases the anarchy that reigns when stars form inside an interstellar cloud. ...

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• VLT takes a close look at NGC 6357 | Astronomy.com
• Why do some stars appear to flash a variety of different colors when you look
• Dusty stellar nurseries from the dark side of a galaxy | Astronomy.com

The Sun's corona . ... For instance, short "plumes" rising from the polar regions of the Sun look very much like field lines coming out of the end of a bar magnet, and they therefore suggest that the Sun, in addition to the intense fields of sunspots, also has a global magnetic field like the Earth's. Arches above the . Sun's surface . ... It is brightest near sunspots, whose arched field lines apparently hamper the outflow of solar wind which carries away energy and helps cool the corona. ...

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• Comet Introduction
• Uranus' Moon Umbriel
• The Polar Aurora

... disappearance/eruption of the filament accompanied by a number of large-scale dynamic phenomena (a coronal wave, chain, CME, arcade) Yohkoh/SXT . H-alpha and Yohkoh/SXT . ... SOHO/EIT (DelaboudiniХre et al., 1995) images and movies; . ... Preceding activity SOHO/EIT, 195 A (10-22 UT) (Figure 3) . ... SOHO/EIT, 171 A (Figure 4) MLSO/HAO H-alpha and He I 10830 A (Figure 5) MLSO/HAO, He I 10830 A . ... SOHO/EIT, 171 A (Figure 4) SOHO/EIT (171, 195, 284, 304 A) Dec 29, 1999 (Figure 10) . ...

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• The 14 July 2000 meter-wavelength dynamic radio spectrum