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 . ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Risks Comparable to NEOs . ... The Increasing Rate of Discovery of Asteroids . ... Comet and Asteroid Collision Probabilities . ... Extreme albedo comets and the impact hazard (PDF Format) . ... Asteroid Impact Animations . ... Workshop on Scientific Requirements for Mitigation of Hazardous Comets and Asteroids - 2002 . ... The Spaceguard Survey Report, 1992 (PDF) . Tsunami from Asteroid/Comet Impacts . ...

... The new emission line galaxies are listed in Table 2 containing the following information: . column 1: The object's IAU-type name with the prefix HS. column 2: Right ascension for epoch B1950. column 3: Declination for epoch B1950. ... The spectra of all emission-line galaxies are shown in the Appendix A. The results of line flux measurements are given in Table 4. ... column 1: The object's IAU-type name with the prefix HS. column 2: Observed flux (in 10 -16 ergs -1 cm -2 ) of the H 4861 ? ...

... 1994: . Deep CCD images of the bright gamma-ray bursts GRB790418 and GRB790613 localization regions were obtained for the first time. In both cases, a faint blue star-like object (V = 24.5 m , BV m ) was detected within the region of localization of gamma-ray bursts. ... Based on sixty daily instantaneous spectra of the object SS433, obtained on the RATAN-600 in April-May 1994, we traced its variability in four very powerful flares at five frequencies. ... Archive . ...

... 1.4 Completed WF/PC-2 8592 (Pixel Microlensing of M87) The WF/PC-2 was used to undertake a pixel microlensing study of M87 in order to: 1} probe the lower end of the M87 IMF via star-star lensing, 2} possibly obtain the first evidence of Massive Compact Objects (MACHOs) in the halo of a galaxy other than our own, and 3} search for intracluster MACHOs. ... They are also the only sample of galaxies selected on the basis of their mass rather than their luminosity or surface brightness. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Armagh Planetarium . ... Our Galaxy . ... Stars . ... Space Flight . ... This activity is believed to be promoting the unusually high rate of star formation seen in M82. ... Radio image of M82 made with the MERLIN and VLA telescopes. Insets show MERLIN images from April 25th and May 3rd 2009 demonstrating the sudden appearance of the mystery object.€а All images are at a frequency of 5 GHz. ... Mystery object in Starburst Galaxy M82 . ...

... On the base of laboratory simulations (on rotating shallow water) of the formation of spiral arms in galactic gaseous disks, the existence of giant anticyclones in them was predicted. Numerical simulations shown that the vortex structures arise on a linear stage of spiral arms formation simultaneously with the latter. ... Thus second giants structures, after spiral arms, in spiral galactic disks are discovered. ...

... Furthermore, they are all radio sources and in two cases, Sco X-1 and Cir X-1, the radio emission has been resolved into relativistic jets. Figure 1: X-ray colour-colour diagram for the newly-discovered source XTE J1701-462, displaying the three branches characteristic of a "Z source". ... In January 2006, for the first time, a new, transient, Z source was discovered: XTE J1701-462 was rapidly identified as a member of this exclusive class by its characteristic X-ray timing behaviour (Homan et al. ...

Detected Supernovae . The search have produced till now the detections of 4 SNe. ... This result highlights the power of infrared monitoring in detecting Obscured SNe and indicates that optical surveys are probably missing a significant fraction of SNe, especially in obscured systems such as starburst galaxies. ... In Fig. we show the archival SOFI image of NGC3256 (left) and the first image obtained in 2001 (right) where SN2001db has been detected. ...

... Observing . ... Observing springtime deep-sky objects with a large telescope . Springtime observing for small telescopes . ... Astronomy magazine Editor David J. Eicher shares 10 of his favorite springtime deep-sky objects, including the NGC 3190 galaxy group, 3C 273, and NGC 3242. ... In this video, Astronomy magazine Editor David J. Eicher discusses deep-sky objects in the spring sky you can see with a 12-inch or larger telescope. ... Get instant access to subscriber content on Astronomy.com! ...

... A tussle in the distant Universe. This Hubble Space Telescope image shows evidence for a merger between a quasar and a companion galaxy. The quasar is the bright object just beneath the image center, and the wisps of material around it are remains of a galaxy disrupted by the interaction between it and the quasar. ... Galactic Nuclei: Old Quasars? Quasars as Probes of the Distant Universe . ... Quasars. ... The name quasar is made up with parts of the words "quasi-stellar radio." ...

General Forum Message . Forums: . ... Deep Space Object Galaxy Near M13 . ... Can anyone tell me if there is a DSO (likely a galaxy) near M13? ... The reason it interests me is that I drew a sketch of M13 years and years ago while observing - and that object is one of the handful of 'stars' that I drew. ... www.astronomy.net . About Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... Anisotropic Radiation from Relativistic Beaming 12 4.1. ... Basis for Unification Schemes 17 5.1. ... Distinction between FR I and FR II Radio Galaxies : : : : : : : : : : : : : : : : : : 19 5.3. ... Isotropic Properties of BL Lac Objects and FR I Galaxies : : : : : : : : : : : : : : : 24 5.4.1. ... Unification of BL Lac Objects and FR I Galaxies : : : : : : : : : : : : : : : : : : : : 36 6.2.1. ... Properties of X­Ray­Selected and Radio­Selected BL Lac Objects : : : : : : : 37 6.2.3. ...

... Galaxy Evolution home . ... Micro quasars Publications . ... In the last few years a very similar phenomenon has been observed in some X-ray binaries, binary stellar systems with one gravitationally-compact object (black hole or neutron star) and an "normal" star part of whos atmosphere is captured by the compact object. ... The compact objects (a few solar masses) are much smaller than those inferred in AGN (10 9 solar masses), and the sizes much smaller, so the analogy may not be complete. ...

... Sternberg Astronomical Institute , Moscow University . ... Present edition unites two parts of Catalogue of interacting galaxies by B.A.Vorontsov-Velyaminov: the first part (Part 1) containing 355 systems was published in 1959 [1] and the second one (Part 2) with 497 objects - in 1976 [2].Thus two published parts of Catalogue include 852 interacting systems. ... All new of them (1162 by number) were taken from the comments to the galaxies in Morphological catalogue by Vorontsov-Velyaminov et al.[ ...

... Hoags Object: A Strange Ring Galaxy . ... Credit Copyright: R. Lucas ( STScI / AURA ), Hubble Heritage Team , NASA Explanation: Is this one galaxy or two? ... How Hoag's Object formed remains unknown, although similar objects have now been identified and collectively labeled as a form of ring galaxy . ... The above photo taken by the Hubble Space Telescope in July 2001 revealed unprecedented details of Hoag's Object. ... July . ... July 2013 . ... The Double Ring Galaxies of Arp 147 from Hubble . ...

Polycyclic aromatic hydrocarbons in HII regions: correlation with metallicity . ... We have perfomed the aperture photometry of HII regions using infrared images from telescopes Spitzer and Herschel at passbands 3.6, 4.5, 5.8, 8.0, 24, 70 and 160 m. Emission of PAHs are observed at passbands 3.6 - 8.0 m, 24 m is emission likely of hot small particles and finally large particles are responsible for emission at 70 and 160 m. We determine abundances of PAHs using model of Draine Li (2007) . ...

... Cross-shaped galaxy ZGC 2315+03 (Fig.1) has been described by Zwicky (1971) as ``post-eruptive or the result of the crossing of a compact galaxy through an edge-on spiral'' . This object was included in the Polar-Ring Catalog (C-71) by Whitmore et al. (1990) as a possible candidate for Polar-Ring Galaxies (PRG). ... One of them is galaxy 'disk' and the other is 'polar-ring'. ... The facts against the polar-ring nature of ZGC 2315+03 can be summarized as follows: . ...

... 2013 July 28 . Hoag's Object: A Strange Ring Galaxy . ... This question came to light in 1950 when astronomer Art Hoag chanced upon this unusual extragalactic object . ... How Hoag's Object formed remains unknown, although similar objects have now been identified and collectively labeled as a form of ring galaxy . ... Hoag's Object spans about 100,000 light years and lies about 600 million light years away toward the constellation of the Snake ( Serpens ). ... About APOD | ...

... 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. ...