... Tonight's Sky . ... The Magazine . ... Observing . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... Bright planets meet at dusk . ... Astronomy magazine subscribers can read the full article for free. ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter....

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• Astronomy Magazine - Interactive Star Charts, Planets, Meteors, Comets,
• Hubble sees NGC 7090 т?? an active star-forming galaxy | Astronomy.com
• Dawnт??s Ceres color map reveals surface diversity | Astronomy.com

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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... Now rotating behind the Sun's visible edge, these groups followed close on the heels of another enormous sunspot group which appeared in mid July. ... While individual sunspots are not numbered or cataloged, groups of sunspots, designated solar active regions, are given consecutive numbers as they appear on the visible solar disk . ... Publications with keywords: Sun - sunspot - active region . Publications with words: Sun - sunspot - active region . ... An X Class Flare Region on the Sun . ...

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• XWare > APOD

... 2000 June 8 . Active Regions, CMEs, and X-Class Flares . ... Explanation: Space Weather forcasters are predicting major storm conditions over the next few days as the active Sun has produced at least three strong flares and a large coronal mass ejection (CME) since Tuesday, June 6th . ... X-ray hot plasma suspended in looping magnetic fields arcs above this region, cataloged as AR9026. AR9026 appears as a large group of sunspots in visible light images. ... About APOD | ...

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• APOD: 2002 August 1 - Sunspots and Solar Active Regions
• APOD: 2008 January 10 - Active Galaxy Centaurus A
• APOD: 2001 August 16 - Centaurus A: X-Rays from an Active Galaxy

... ACS survey observations of eight clusters are scheduled for the coming week, together with follow-up NICMOS observations of a supernova detected in previous ACS images. ... The present HST program will obtain two-colour (F606W, F814W) ACS images of the central regions of 66 of the ~150 Galactic clusters, with the goals of . ... Observations of the clusters Palomar 1, NGC 1261, NGC 6838, NGC 3201, NGC 5904 and NGC 104 (47 Tucanae) are scheduled over the next week. page by Neill Reid, updated 8/3/2006...

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• Spitzer and JCMT Observations of the Active Galactic Nucleus in the Sombrero
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• STScI Active Galaxies Lunch Talk Series

Astronotes Armagh Planetarium's Stellar Blog! ... Our Galaxy . ... Space Flight . ... Posted on April 21, 2011 | No Comments An image from the European Southern Observatory, reveals two galaxies, NGC 3169 and NGC 3166, meeting in intergalactic space. ... Continue Reading.. ... 1 Comment NGC 2841 is a rather beautiful flocculent spiral galaxy. The Hubble Space Telescope recently imaged NGC 2841 as part of an investigation into how new stars are created. ... Posted on October 28, 2010 | ...

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... Sun images . ... Sun flares . ... Active areas . September : 2015 . ... The following regions with sunspots can be now observed on the Sun's surface . Group number . ... Group length (in degrees) . ... Coordinates and other characteristics of active regions are issued for September 09, 2015 00:31 UT The following H-alpha plages without spots can be currently observed on the Sun's surface . ... Coordinates and other characteristics of active regions are issued for September 09, 2015 00:31 UT . ...

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• Sunspots and active regions January 10, 2012
• Sunspots and active regions January 01, 2013
• Sunspots and active regions January 01, 2015

Next: NGC 660 Up: The Group of Nearby Previous: The Group of Nearby . NGC 253 is a nearby edge-on galaxy and the brightest member of the Sculptor group. ... The strong and extended radio emission makes it especially suitable for H I absorption measurements (see e.g., Combes, Gottesman & Weliachew 1977; Dickey, Brinks & Puche 1992; Koribalski, Whiteoak & Houghton 1995). ... Column (1): Galaxy name. ... Next: NGC 660 Up: The Group of Nearby Previous: The Group of Nearby Baerbel Koribalski . ...

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• PhD Thesis (summary)
• The peculiar galaxy NGC 4258: A black hole candidate.
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... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. June 16, 1998 . An Active Region of the Sun . Credit: A. Title ( Stanford Lockheed Institute ), TRACE , NASA . ... This false-color image depicts an active region near an edge of the Sun . Hot plasma is seen exploding off the Sun's photosphere and traveling along loops defined by the Sun's magnetic field . ... About APOD > . ...

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• APOD: October 18, 1999 - NGC 3603: An Active Star Cluster
• The BD+40 region (Abstract)
• APOD: 2000 November 8 - October Skylights

. Home . News . Gallery . Events . Twitter . Press Releases . Links . Contact Us . Calendar . Press & Web Coverage . Previous . Next . List . Deirdre Kelleghan kept observing the Sun and she sent us a new wonderful drawing: "Active Region 10999, June 20th 2008 13:45 UT; PST 40/8mmTVP eyepiece/50X upscaled by eye; soft pastels and graphite on black paper". Thank you, Deirdre! . Tuesday, 24 June 2008 01:52 . International Year of Astronomy, Ireland National Node . [Back To Top] .

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• Armagh Observatory
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• Terry Mosely's Bulletins

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• Wide-field view of the sky around the distant active galaxy PKS 1830-211
• Zooming in on the distant active galaxy PKS 1830-211 | ESO
• The Innermost Region of the Active Galaxy NGC 1068 | ESO Ireland

Ganymede is the largest moon in our solar system, larger even than the planets Pluto and Mercury. ... Ganymede's surface consists of two main types of terrain: old, dark polygonal units, and young, bright valleys and ridges (see figure 11 ). ... In a similar way, hitting a large block of ice with a hammer makes white marks. ... Ganymede as seen by Voyager 2. ... Because Voyager couldn't spot any large impact craters, scientists have concluded that the moon's surface is young. ... Moon . ... Europa . ...

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• ASP: Beacons in the Gloom
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• ASP: Astronomy in the News

GALAXIES cenA .tiff 40 Bright Radio Galaxy M31.tiff Nikon Andromeda Galaxy (note HII regions in spiral arms) ngc6744.tiff 40 NGC 6744 a face-on spiral clouds_20d.tiff H'blad The Magellanic Clouds our nearest neighbours Lmc_7.tiff Nikon The Large Magellanic Clouds Lmc_zoom.tiff Nikon Detail of previous image smc_7.tiff Nikon The Small Magellanic Clouds smc-zoom.tiff Nikon Detail of previous image 30dor_40_BVR.tiff 40 The 30 Dor ... B [OIII] Halpha trifid.tiff 40" The Trifid Nebula. ...

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• ASTR1002 Assignments 4-6: Planet Ziggy
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• IAU Commission #34 (Interstellar Matter)

... Bad Astronomy . ... Bitesize Astronomy . ... Bad Astro Store . ... Slacker Astronomy . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Life Under the Moon . ... Seeing Jupiter's Moons . ... Time Zones and the Spherical Earth . A Companion to the Earth? ... December 19, 1999) . ... Big Moon, Little Moon . ... How Big is the Moon? ... 14, 2000) . ... 2008 Phil Plait. ... Subscribe to the Bad Astronomy Newsletter! Talk about Bad Astronomy on the BA Bulletin Board! ...

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• Phil Plait's Bad Astronomy: Q and BA
• Phil Plait's Bad Astronomy: Mad Science

... A radio galaxy is a galaxy that emits an unusually big amount of energy at radio wavelengths. ... Inside of each galaxy with an active nucleus (radio galaxies are among them) there must be a system of a "central machine" responsible for the colossal amount of the emitted energy from radio to gamma ranges. ... Sometimes a radio source in an active galaxy may flare again if the needed conditions appear (a new portion of matter would fall into the furnace of the "central machine"). ...

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• Galaxy sector, archive 1994
• Measurement of the dark halo shape in polar ring galaxies
• Solar system sector, archive 1994

... Dept. for Astrometry & Space Geodynamics . ... Dept. for Physics of Stars&Galaxies . ... Dept. for Physics of Planetary Systems . ... Science . ... All Pages . ... Research of the stars with planets which pass apparent star disk (transiting exoplanets). The transit method based on a detection star brightness decrease during a passing of planet in front of its disk. Observed brightness system decries when planet pass star disk and its volume depend of the relative sizes star and planet. ...

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• Achievements - Page 4
• Dept. for Physics of Stars&Galaxies
• Anatoliy P. Vidmachenko

... Radio astronomers at Arecibo Observatory observe a wide variety of phenomena in the Milky Way and in other galaxies. ... Some REU projects are carried out on pre-existing data, and others rely on obtaining new data. ... Deriving a new shape model from existing radar images has been a popular student project in past years, and there are data sets that could be used for this. We are collecting thermal infrared emission data for many of the near-Earth asteroids that are also observed with radar. ...

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• Planetary Radar: Arecibo Radar Images of Planets
• Solar Flares Reach Earth National Astronomy and Ionosphere Center (Arecibo
• AGES - the Arecibo Galaxy Environment Survey

... A database on solar active regions has been implemented in IDL (Interactive Data Language). ... Full-disk 17 GHz radio maps produced by the Nobeyama Radioheliograph provide the basis for the database. Researchers of solar activity often need to access solar active region data. ... So far, we have created an IDL-based database on daily active region data from 1992 July 1 to 1994 December 31 (NOAA 7213 thru NOAA 7821) 2 . ... number of active regions visible on the disk; . ... IDL 1 . ...

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• The Co-Addition Technique Applied to Images of Galaxy Cores
• ADASS 2003 Conference Proceedings
• Classification of Objects in the Guide Star Catalog

... 773Veron-Cetty Veron . Quasars (brighter than absolute magnitude -23) 85221 . ... Active galaxies (fainter than -23) 21737 . VII/248 Quasars and Active Galactic Nuclei (12th Ed.) (Veron+ 2006) ================================================================================ Quasars and Active Galactic Nuclei (12th Ed.) Veron-Cetty M.P., Veron P. =2006A .. ... 374, 92 (Catalogue ) (11) Veron-Cetty M.P., Veron P., 2003, Astron. ...

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• The Spectrophotometrical complex in Nasmyth-1 focus
• Russian-Finnish Symposium, Program
• Catalog of Galaxies behind the Milky Way

... Panoramic spectroscopy of galaxies with star-formation regions. a study of SBS 1202 + 583" . Hakopian, S. A.; Balayan, S. K.; Dodonov, S. N.; Moiseev, A. V.; Smirnova, A. A. 2012, Astrophysics, v.55, p.1 . The origin of gas in extended narrow-line regions of nearby Seyfert galaxies - I. NGC 7212" . ... Smirnova, A. A. ; Moiseev, A. V.; Afanasiev, V. L. 2010, MNRAS, v.408, p.400 (astro-ph/1006.5547) . ... Studying of some Seyfert galaxies by means of panoramic spectroscopy." ...

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• ZHE Home Page
• Fabry-Perot Interferometer: Gallery Old
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