M1 image More About M1 Nice Color Picture . ... M16 image More About M16 HST image . ... M31 image More About M31 Nice Color Picture . ... M42 image ; M43 image More About M42/43 Nice Color CCD Picture . M51 image More About M51 Color Image of M51 M51 Supernova . M57 image More About M57 Nice Color CCD Picture Very Deep M57 Image . ... M81 image More About M81 M81 Supernova Ultraviolet Image of M81 More about Ultraviolet Imaging . M82 image More About M82 M82 False Color M82 True Color . ...

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• Low Surface Brightness Galaxy Gallery
• Astronomy Plus CCD Images of Galaxies

... A red Moon rose over Cape Cod, Massachusetts, USA on March 3rd, immersed in Earth's shadow near the total phase of a lunar eclipse. ... When a Full Moon lies near the ecliptic there can be a lunar eclipse. That cosmic alignment is well illustrated in this composite of eclipse images recorded last Saturday near Paris, France. ... This dramatic image features a dark red Moon during a total lunar eclipse -- celestial shadow play enjoyed by many denizens of planet Earth last Saturday. ...

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... Each one is part of the galaxy we live in called the Milky Way. ... Galaxies come in a variety of shapes and sizes; many are spiral disc galaxies, like the Milky Way. ... For many years astronomers have believed that when two similar-sized spiral galaxies collide, they will mash together a type of galaxy called an elliptical galaxy, the shape of a giant squashed football. But, if two spiral galaxies make one elliptical galaxy, how are there still so many spiral galaxies in the Universe? ...

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• http://www.eso.org/public/news/eso1120/kids/
• http://www.eso.org/public/news/eso1426/kids/
• http://www.eso.org/public/news/eso1431/kids/

When combined with infrared observations with the Spitzer telescope (3 to 160 ЮМm), the Herschel Space Observatory now fully samples the thermal dust emission up to 500 ЮМm and enables us to better estimate the total infrared-submm energy budget (LTIR) of nearby galaxies. We present new empirical calibrations to estimate resolved and integrated total infrared luminosities from Spitzer and Herschel bands used as monochromatic or combined tracers. ...

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• Starburst and Galaxy evolution
• A Flux Weighted Map of the Galaxy Distribution
• The Emission by Dust and Stars of Nearby Galaxies in the Herschel KINGFISH

... 2003 August 14 . Dark Matter Map . ... ESA , NASA . ... Of course, the total cluster mass is the sum of the galaxies themselves, seen as ordinary luminous matter, plus the cluster's invisible dark matter whose nature remains unknown. ... Their resulting map shows the otherwise invisible dark matter in blue, and the positions of the cluster galaxies in yellow. ... About APOD | ... NASA Web Site Statements, Warnings, and Disclaimers . NASA Official: Jay Norris. ...

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• APOD: 2001 September 11 - Spiral Galaxy NGC 3310 Across the Visible
• APOD: 2001 October 24 - The Matter of Galaxy Clusters
• APOD: 2012 August 12 - Spiral Galaxy NGC 4038 in Collision

... The two plots below illustrate two of the selection criteria: velocity width (limited by the channel width) and the HIPASS peak flux. Zoom-in on Figure 3a. The two plots below give some idea of the shape of the HI spectra. ... For Gaussian HI spectra the difference is slightly more, but for irrgeular galaxies, pairs and groups many different shapes are observed. ... Some trend towards detecting more narrow-width galaxies at higher velocities is visible. ...

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• NGC 2915: The Darkest Spiral Galaxy
• Total Magnitudes of Virgo Galaxies. I. Construction of a Self-consistent
• Total Magnitudes of Virgo Galaxies. II. An Investigation into the mp Scale of

... STScI-PRC01-04 HUBBLE'S ULTRAVIOLET VIEWS OF NEARBY GALAXIES YIELD CLUES TO EARLY UNIVERSE Astronomers are using these three NASA Hubble Space Telescope images to help tackle the question of why distant galaxies have such odd shapes, appearing markedly different from the typical elliptical and spiral galaxies seen in the nearby universe. ... Light from these galaxies travels great distances (billions of light-years) to reach Earth. ... These stars emit mostly ultraviolet light. ...

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• Atlas of Monte Carlo Models of Dust Extinction in Galaxies
• APOD: July 15, 1998 - Ghost Galaxy NGC 2915
• APOD: September 22, 1998 - M61: Virgo Spiral Galaxy

... 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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• Get ready for the 2017 total solar eclipse! | Astronomy.com
• Dwarf galaxy causes questions in current galaxy formation models | Astronomy...
• Kenya Total Eclipse Safari | Astronomy.com

... 2007: . A Young Binary System Theta 1 Ori C. Based on the interferometer observations on BTA, for the first time we drew an orbit, calculated the masses, luminosity and spectral classes of the components of a very young (~ 100 thousand years old) massive (a total mass of 48 times the Sun) binary system Theta 1 Ori C in the nearest to us Orion complex of star formation. Archive . ...

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• Catalog of the LV Galaxies
• New LBV Discovered in DDO 68 Galaxy
• UGC 2172, NGC 3239

Astronotes Armagh Planetarium's Stellar Blog! ... Our Galaxy . ... Other Galaxies . ... Space Flight . ... When Galaxies Collide (Image credit: ALMA (ESO/NAOJ/NRAO). Visible light image: the NASA/ESA Hubble Space Telescope) . In the southern sky constellation of Corvus (the Crow), we see the Antennae Galaxies (alias NGC 4038 and 4039). ... Your email address will not be published. ... Here you will find the latest news and views from the fascinating worlds of astronomy and space exploration. ...

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• St Patrick?s Academy Rockets Ahead | Astronotes
• Vesta: Asteroid seen by Dawn spacecraft | Astronotes
• Christmas Card Competition Winners: Images of the Month | Astronotes

... Visible Distribution of Galaxies. ... Features of Elliptical, Lens-Shaped, Spiral and Irregular Galaxies. Galaxies with Bar. ... Distribution of Surface Brightness of Surface and Spiral Galaxies. ... Color Characteristics of Galaxies. ... Methods of Galaxies' Mass Determination. ... Hidden Mass of Spiral Galaxies. ... Features of Dark Matter Distribution in E and SO Galaxies. ... The Whole Number of Galaxies and Their Density by the Results of Observation on the 'Hubble' Space Telescope. ...

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• Stellar Astronomy

... Confirm Dark Galaxy Existence . ... New evidence from NASA's Hubble Space Telescope and the Westerbork Synthesis Radio Telescope in the Netherlands has been used to rule out all but one of the ideas put forward to explain the existence of VIRGOHI 21, an intergalactic gas cloud 50 million light-years from the Earth. ... Are there more such dark galaxies out there? ... Credit: R. Minchin / Arecibo Observatory / Cardiff University / Isaac Newton Telescope / Westerbork Synthesis Radio Telescope . ...

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• The SMUDGES Survey
• Ionization and the Detection of Low HI Mass Galaxies
• The Search for HVCs in Other Galaxies

... Our Sun is part of a huge wheel-shaped collection of stars. ... Astronomers have long suspected it was a very massive black hole, and that every galaxy had such a central mass, created early in the history of the universe. ... However, unless that object happens to be headed directly at the black hole (a relatively small target) it will just swing around and fly away again, like a comet making a pass at the Sun. The velocity acquired in falling towards the black hole also helps it escape. ...

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• The Sun's Corona
• Spacecraft Observing the Sun and the Heavens above

... О Далекой Галактике . ... Теперь в Далекой Галактике вы всегда можете увидеть свежие фотографии Солнца. ... Форум . Форум "Далекой Галактики" - прекрасное место для общения всех астрономов. ... Новости из космоса . ... Подписаться на новости Далекой Галактики Вы можете здесь: . ... Новости из Далекой Галактики - популярно об Астрономии . ... Если вы хотите выразить свое мнение о сайте "Далекая Галактика", или просто почитать мнения других посетителей - пожалуйста, заходите в Гостевую книгу . ...

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The reduction of a given magnitude m to bt is given by: . bt = a.m + b + c.(logr25 - <logr25>) . ... e.(logd25 - <logd25>) . f.(de1950 - <de1950>) . where a, b, c, d, e, f, <logr25>, <t>, <logd25> and <de1950> are constant values given in the table here below for each reference taken into account. The mean bt magnitude is calculated as a weighted mean where the weight (last column) is derived from each source of magnitude as the inverse square of the mean standard deviation. ...

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• Documentation: LEDA: parameter:
• Nearby Galaxies Catalogue (NBG)
• Optically detected galaxies with POSSI-E in the "zone of avoidance. I-V

... Ciel Espace, le magazine qui vous guide toujours plus loin . ... des pages consacr†йes †а la publication de vos photos Mais c'est aussi une vraie communaut†й avec laquelle partager votre passion et nourrir votre curiosit†й. Accueil LтАЩ†йclipse totale de Soleil vue par satellite . ... Cette photographie issue du satellite m†йt†йorologique Himawari-8 (€л tournesol €Ё en japonais) montre l'†йclipse totale de Soleil qui a eu lieu en Asie du Sud-Est ce mercredi 9 mars 2016. ... Envoyer par email . ...

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• Toute la violence dтАЩun amas de galaxies | Ciel et Espace
• Mati†иre noire : une observation d†йfie les astronomes | Ciel et Espace
• LтАЩ†йtrange fant†‡me de Galaxy Zoo | Ciel et Espace

As the Universe expands, gravity pulls on the Universe, and slows the expansion down over time. As we look to great distances, we are looking back in time. If we can measure how fast the Universe is expanding in the past, and compare it to how fast it is expanding now, we can see the total gravitational effect of all matter in the Universe. Here we plot the distance between two galaxies as a function of time. ... Universes with lots of material . ...

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• Julie Banfield | Astronomer
• Research Interests
• Dark Matter in Spiral Galaxies

. Back to A.Zasov's homepage.

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... What is there beyond the edge of the universe? ... This is often illustrated by newspaper headlines: "Scientist sees face of God, confirms Big Bang model" (a reference to results from the Cosmic Background Explorer satellite), "Is the cosmos younger than some of the stars it contains? ... The Lone Universe . ... We cannot reproduce it; we cannot take another one and see what happens to it; we cannot compare it to anything else, as astronomers routinely do with planets, stars, and galaxies. ...

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• ASP's 2012 Annual Meeting
• Astronomical Society
• ASP: December's Total Lunar Eclipse

... Archives . ... As discussed in systematic errors, astronomers, like physicists, show their error components in two additive terms; statistical error + systematic error. To explain such decomposition and to make error analysis statistically rigorous, the law of total variance (LTV) seems indispensable. ... Tags: additive , bias , law of total variance , MADS , mathematical statistics , mean integrated square error , mean square error , MISE , mse , probability theory , variance . ... Chandra Blog . ...

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• The AstroStat Slog law of total variance
• The AstroStat Slog 2009 May
• The galaxy M100