... 1.12.1999 . ... Massive stars -- upwards of tens of times the mass of the Sun - profoundly affect their galactic environment. Churning and mixing the clouds of gas and dust between the stars, they leave their mark on the compositions and locations of future generations of stars and star systems. ... This star, though, somehow ejects energetic "bullets" of high-energy particles, appearing as red streaks toward the lower right of the this image. ... A Leonids Meteor Storm in 1999 . ... 1999 2000 . ...

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... One of this year's largest mass ejections from the Sun's atmosphere was recorded last Sunday by TESIS telescopes aboard the CORONAS-PHOTON satellite ( video - wmv 4.3 MB ). ... Over the course of a week, two gigantic solar prominences were simultaneously ejected from the surface of the Sun. ... Earth will not feel the Sun's influence either. ... The TESIS observatory ї TESIS: www.tesis.lebedev.ru . ... One of this year's largest mass ejections from the Sun's atmosphere (movie WMV, 4.3 MB) . ...

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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
• The Galaxy Gallery Page 6: Comparative Morphology
• Fabry-Perot Images of Starburst Galaxies

... About ATNF overview . ... Both are consistent with earlier estimates, computed for the population of optically selected galaxies. This consistency occurs because, although the distribution of optical central surface brightnesses among galaxies is flat, we fail to find a population of galaxies with central surface brightnesses fainter than 24б  B - , even though there is no observational selection against them. Keywords: Galaxies: Luminosity Function, Mass Function; Surveys . ...

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• Evolutionary Paths in Galaxy Morphology
• ATNF Daily Astronomy Picture
• ATNF Colloquium

... Using this model, I will show how AGN feedback affects the evolution of massive galaxies, causing them to become less massive, smaller, and redder. In addition, several observed relationships, including cosmic star formation rate density, galaxy luminosity function, and [alpha/Fe]-mass, can only begin to be reproduced when it is included. Finally, I will show how the enrichment history of massive galaxies and the IGM may be influenced by AGN feedback. ...

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• http://www.mso.anu.edu.au/seminars/abstracts/20151112-1100.html
• http://www.mso.anu.edu.au/seminars/abstracts/20160304-1400.html
• http://www.mso.anu.edu.au/~kcf/surya/spiralstructure/Fuchs02

Physical dust models are presented for 65 galaxies in SINGS that are strongly detected in the four IRAC bands and three MIPS bands. For each galaxy we estimate (1) the total dust mass, (2) the fraction of the dust mass contributed by PAHs, and (3) the intensity of the starlight heating the dust grains. We find that spiral galaxies have dust properties resembling the dust in the local region of the Milky Way, with similar dust-to-gas ratio and similar PAH abundance. ...

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• HST this week: 329
• Modeling Dust and Starlight in Galaxies Observed by Spitzer and Herschel: NGC
• HST this week: 335

... A hundred years later, a handful of Tunguska-sized asteroids have been spotted by telescopes, but most remain unseen. The asteroid designated 2008 TC3 , which made the news on October 6th before colliding with the Earth on October 7th was too small to constitute a part of the "Earth impact hazard". ... 2008 TC3, for example, finally exploded in the atmosphere above Sudan . ... Wednesday, 8 October 2008 01:15 . International Year of Astronomy, Ireland National Node . ...

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• Hot subdwarfs
• Terry Mosely's Bulletins
• High-Mass Star Formation

... Contacts . 2008: . Detection of two new LBV stars. In two exterior galaxies new luminous blue variable stars (LBV) were observed. ... Fast deceleration of rotation of a magnetic star with a strong field HD 37776. 31 years of observations of the magnetic star HD 37776 resulted in detecting deceleration of its axial rotation for 17.7 0.7s (dP/P = 4.0x10 -6 per year). ... It is the first case of magnetic deceleration detection for a chemically peculiar star on the main sequence. ... Archive . ...

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• Galaxy sector, archive 2005
• Lack of Dwarf Galaxies in the Local Volume Compared to Conventional Cosmology
• Galaxy sector, archive 2012

... 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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• Black hole shatters record | Astronomy.com
• Astronomy Magazine - Interactive Star Charts, Planets, Meteors, Comets,
• November 2003 | Astronomy.com

Astronotes Armagh Planetarium's Stellar Blog! ... Space Flight . ... Earth Satellites . ... Leonid meteors seen from 13 km altitude aboard an aircraft during the 1999 Leonids Multi-Instrument Aircraft Campaign (Leonid-MAC). Comet Tempel-Tuttle provides the cometary debris for the Leonid meteor shower. ... Every 17-19 November Earth crosses Tempel-TuttleтАЩs orbit and the Leonids become visible. With clear, dark skies observers may see 10 to 15 Leonid meteors every hour on those mornings. ...

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• Aldebaran: Red Giant at the Eye of the Bull | Astronotes
• Our Galaxy | Astronotes - Part 3
• Martina Glass | Astronotes - Part 5

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2000 November 10 . X-Ray Cygnus A . ... Central in both pictures, the center of Cygnus A shines brightly while emission extends 300,000 light-years to either side along the same axis. Near light speed jets of atomic particles produced by a massive central black hole are believed to cause the emission. ... About APOD | ...

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• APOD: 2000 November 9 - The Cosmic X-Ray Background
• APOD: August 20, 1998 - SOHO Composite: Coronal Mass Ejection
• APOD: 2004 November 16 - Sagittarius Dwarf Irregular Galaxy

... 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 -- History

Next: Massive X-ray Binaries Up: No Title Previous: X-ray Galactic Sources and . Table  7 represents the full matrix of stages of binary stars in a model spiral galaxy with the total mass of matter in stars of for (flat spectrum), and Lyne and Lorimer's distribution for kick velocities (equation 7.4.2 )   with km s (which gives the transverse velocity distribution for modeled pulsars best-fitting Lyne and Lorimer (1994)[ 132 ] data; Figure  24 ). ...

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• Massive X-ray Binaries
• Detection rate of binary compact star merging
• Effect of sources evolution on

Thought-Provoking Imagery Shows Sun's Place in the Galaxy . ... SOHO - Explosive Coronal Mass Ejections from the Sun . SOHO-6 Comet at 2-6 solar radii from the Sun . ... The remarkable images come from SOHO's visible-light coronagraph, LASCO, which is able to mask the intense rays from the Sun's surface in order to reveal the much fainter glow of the solar atmosphere, or corona. ... SOHO is ideally placed to report and even anticipate their origins in the Sun's atmosphere. ... The Sun . ...

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• Clumpy dust disks
• Galaxy archaeology over the last 7 billion years
• Hubble Uncovers Dust Disk Around a Massive Black Hole (STScI-PRC98-22) A

... Science Activities > PhD Thesis Topics offered by ESO Faculty Members > Thesis Topic: The interplay of massive stars, gas and dust in very nearby starbursts . ... The complex interplay between regions of massive star formation and their surroundings is a determining component of galaxy evolution. Winds of massive stars and the resulting supernova explosions inject mechanical energy into the interstellar medium, redistributing gas within a galaxy. ... Return to list of thesis topics . ...

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• ESO - Thesis Topic: Testing the non-universality of the low-mass end of the
• Is merging important for the size and mass growth of galaxies?
• ESO - Thesis Topic: Dynamical models of multiple globular cluster populations

Next: A candidate young galaxy? Up: Results and discussion Previous: Current star formation rate . The integrated H I line flux, the characteristic widths of 21 cm line profile W 50 and W 20 (for a Hanning smoothing of 10.6 km s -1 ), and the derived H I mass for HS 0822+3542 are presented in Table 1 . The small H I mass 2.4 of this galaxy is consistent with its low optical luminosity. ... A rough estimation can be made also on the dynamical mass of HS 0822+3542. ...

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• A candidate young galaxy?
• Catalog of Galaxies behind the Milky Way
• Introduction

Direct images gallery. Here we have presented some images obtained on SAO telescopes by using SCORPIO. ... NGC 6951 . ... This color image are combined from the frames in the filters V ("blue"), R ("green") and middle-band filter SED755 ("red"). ... The true color image is constructed from three frames in B (Texp=600 sec), V (Texp=480 sec) and R (Texp=400 sec) filters. ... The true color image is constructed from three frames in B (Texp=180 sec), V (Texp=120 sec) and R (Texp=90 sec) filters. ...

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• Fabry-Perot Interferometer: Gallery Old
• GRB follow-up team
• SCORPIO: IFP Gallery

... A1972 Date Received: 2004-Jun-01 13:53:14 Technical Page Proposal Type: Regular General Category : Astronomy Sub- Category : Spectroscopy Observation Category : Extragalactic Total Time Requested: 33 Hours Proposal Title: A Search for Massive Low Surface Brightness Galaxies ABSTRACT: Gaining a rm understanding of Low Surface Brightness ( Observations show increasingly that the `traditional' view of LSB galaxies as low mass, blue young dwarf-like systems is actually incorrect. ...

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• Methanol Masers - Press Release

... About ATMoB . ... The Observing Committee is starting an Observing Awards Program to promote observing among the membership of the Amateur Telescope Makers of Boston. ... Participant must be a current member of the Amateur Telescope Makers of Boston . ... To qualify for your Observing Award Certificate, turn in your worksheet and drawings to an ATMoB Observing Committee member or observing@atmob.org . ... This Excel sheet has useful macros. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

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• Amateur Telescope Makers of Boston

... 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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