... Maps of 21cm emission are dominated by warm H i, and most observations of H i absorption against continuum sources are limited to discrete points. ... Current Results At right are maps of H i emission, HISA, and 12 CO emission in the eastern 25% of the survey, given as projections along the velocity (Figure 1) and latitude (Figure 2) axes. ... 2000, A. J., submitted Figure 1: H i Survey Map (`; b): H i 21cm brightness integrated over all velocity channels; white is bright and black is faint. ...

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• HISA Poster for the 33rd Annual Meeting of CASCA, May, 2002
• I-GALFA Reveals Dynamic Events in Our Galaxy
• HISA Poster for the 197th Meeting of the AAS, January, 2001

... 2002 June 20 . Bright Galaxy M81 . ... Explanation: Big and beautiful spiral galaxy M81 , in the northern constellation Ursa Major , is one of the brightest galaxies visible in the skies of planet Earth. This superbly detailed view reveals its bright nucleus, grand spiral arms and sweeping cosmic dust lanes with a scale comparable to the Milky Way . ... The errant dust lane may be the lingering result of a close encounter between M81 and its smaller companion galaxy, M82 . ... About APOD | ...

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• APOD: 2014 November 19 - Bright Spiral Galaxy M81
• APOD: October 14, 1996 - Bright Stars, Dim Galaxy
• APOD: 2001 November 3 - Bright Stars, Dim Galaxy

Various types of stars have dust around them. In the well known case of the Pleiades the dust around the stars is unrelated to the stars, and is instead dust from an interstellar cloud that the Pleiades cluster has drifted into on its way through the galactic disk. ... The dust in interstellar space is observed in a variety of ways: due to its passive absorption of starlight ("extinction"), by its production of polarization in starlight, and then at long wavelengths due to its thermal radiation. ...

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• Discovery and Analysis of 21 ѕ®m Feature Sources in the Magellanic Clouds
• Dust and Atomic Gas in Dwarf Irregular Galaxies of the M81 Group: The SINGS and
• The Behavior of the Aromatic Features in M101 H II Regions: Evidence for Dust

... Observatory . ... Science . ... Science Users Information > Data Handling and Products > Data Reduction FAQ > My data shows an extended, bright feature - what can this be? ... Observing Facilities . ... Observing with ESO Telescopes . ... Science Data Products Forum . ... ESO Data . ... You might also want to check http://www.eso.org/sci/observing/PublicSurveys/useful_links/OmegaCAM_images.html where we provide a collection of example OmegaCAM images, illustrating some special data features. ...

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• ESO - I see unexpected boxy emission-like features in my REDL spectra - where
• Rivi: Be Stars
• The past, present and future appearances of the Refsdal supernova | ESO

... Robert L. Stewart (Brigadier General, USA, Ret.) ... SPECIAL HONORS: Awarded Army Distinguished Service Medal , Defense Superior Service Medal , 2 Legion of Merit, 4 Distinguished Flying Crossed, a Bronze Star, a Meritorious Service Medal , 33 Air Medals, the Army Commendation Medal with Oak Leaf Cluster and V Device, 2 Purple Hearts, the National Defense Service Medal , the Armed Forces Expeditionary Recipient of NASA Space Flight Medal (1984 & 1985). ...

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• Astronaut Bio: Robert Curbeam (12/2007)

... 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,
• Understanding brightness | Astronomy.com
• Bright galaxies | Astronomy.com

In this gallery are many images of Low Surface Brightness Galaxies which have recently been discovered and analyzed. ... The central surface brightness of this galaxy is 24.28 . Malin 2 This galaxy is another huge disk galaxy with a scale length of 15 kpc and a redshift of 15000 km/a. The high surface brightness knot in one of its spiral arms actually has the same color, luminosity and H-alpha equivalent width as the entire Large Magellanic Cloud . ... Truly it is a Low Surface Brightness Galaxy. ...

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• Digital Stellar Spectra

The Mysterious Cone Nebula . ... For example, the origin of the mysterious cone-shaped region seen on the far left remains a mystery. ... Other features in the image include red emission from diffuse interstellar hydrogen , wispy filaments of dark dust , and bright star S Monocerotis , visible on the far right. ... The dark Cone Nebula region clearly contains much dust which blocks light from the emission nebula and open cluster NGC 2264 behind it. ... NASA Official: Jay Norris. ...

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• Orion's Horsehead Nebula
• M81 in Ursa Major
• XWare > APOD

Spectral Line Sources Spectral Line VLBI Chris Phillips JIVE The Netherlands · VLBI High brightness temperatures · Masers : Galactic · OH, H2O, SiO, CH3OH Extragalactic · OH, H2O · Extra-galactic HI absorption Image courtesy of Lincoln Greenhill, CfA VLBI Group See also: Hernstein etal , 1999, Nature, 400, 539 Miyoshi etal , 1995, Nature, 373, 127 1 SiO masers in TX Cam Movie courtesy of Phil Diamond, Jodrell Bank SiO masers in Orion BN/KL Greenhill ...

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• The HIPASS Bright Galaxy Catalog
• Basic features of the UKST H interference filter
• HIPASS Bright Galaxy Catalog

In the PROJECT we are using the following peculiar . features of RATAN-600 . ... Brightness temperature sensitivity being equal to the antenna temperature sensitivity .. ... Receiver system .. ... Using aperture averaging effect. dual- beam and dual (multi-) frequency filtration, we demonstrated full filtration of the atmosphere noise down to the receiver noise at all scales of acoustics peaks ( Fig.1 , Fig 2 ). ... We select this frequency as the central one in our project. ... Antenna surface . ...

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• Emission molecular bands
• Experiment COLD: Astrophysical Problems Studied in Experiment Cold
• Fabry-Perot Interferometer: Gallery Old

... A detailed study of two consecutive bright points observed simultaneously with CDS, EIT and MDI is presented. The analysis of the evolution of the photospheric magnetic features and their coronal counterpart shows that there is a linear dependence between the EIT Fe XII 195? flux and the total magnetic flux of the photospheric bipolarity. ... In a follow-up study, we used wide slit (90arcsec240arcsec) movies of four EIT coronal bright points (BPs) obtained with CDS. ...

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• Featured Image | International Year of Astronomy in Ireland | Astronomy 2009
• aroundNorth
• Coronal Bright Points: Another Oscillating Environment

... Up: User Interfaces and Visualization . Previous: DASHA-2: Improving Visualization and Processing of Photometric Data with IDL Objects . ... Smirnov, O. & Malkov, O. 1999, in ASP Conf. ... 172, Astronomical Data Analysis Software and Systems VIII, eds. D. M. Mehringer, R. L. Plante, & D. A. Roberts (San Francisco: ASP), 442 . ... XSKYMAP is a widget-based IDL application for visualization of astronomical catalogs. Since then XSKYMAP has grown into a powerful sky catalog visualization tool. ...

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• Automatic Detection of Linear Features in Astronomical Images
• Xguiphot: A New Aperture Photometry Tool for IRAF
• Improvements in Filter Design for Removing Galactic ``Cirrus'' from IRAS Images

... The picture shows sketches of the optical and ultraviolet (top, left) and X-ray (top, right) spectra of a typical quasar or AGN (Active Galactic Nucleus). These spectra are full of sharp features due to the interaction of atoms with light ('atomic features'). They can be high (= bright) points, called 'emission lines' or low (= dark) points, called 'absorption lines' . ... Broad Emission Lines ("BELs") [seen in 100% of AGN], . ... Broad Absorption Lines ("BALs") [see in only 10% of AGN], . ...

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• Wendy Roberts - Bibliography, Harvard-Smithsonian Center for Astrophysics
• The AstroStat Slog flux
• The AstroStat Slog emission

... OCR by H.Andernach 1/96, to be proof-read) This is the first of a series of papers presenting results of a 10-GHz radio continuum survey of the galactic plane region using the 45-m telescope at Nobeyama. ... Weak Nonthermal Sources: A comparison with the Bonn S-GHz survey reveals a number of weak nonthermal sources near the galactic plane. ... For this reason we conducted a survey of the galactic plane region at 10 GHz using the 45-m radio telescope at the Nobeyama Radio Observatory (NRO). ...

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• XID: Cross-Association of ROSAT/Bright Source Catalog
• Results and conclusions
• The Parkes 6 cm Galactic Survey

... Telescopes ћ Binoculars ћ Microscopes . Meade Ultra-High Transmission coatings (UHTC ) Group . ... Meade Standard Coatings: The optical surfaces of all Meade telescopes include high-grade optical coatings fully consistent in quality with the precision of the optical surfaces themselves. ... These specialized, and extremely advantageous, coatings are offered here as the Meade Ultra-High Transmission Coatings (UHTC) group, a coatings group available optionally on many Meade telescope models. ...

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• Meade Series 4000 Photo-Visual Color Filters
• SolarMax II 60mm Double Stack Solar Telescope with RichView system and 10mm
• Meade Instruments Corporation - Pictor Manual Parts 14 and 15

Subject, Problems and Objects of Theoretical Astrophysics. ... Stellar Photospheres, Their Features. ... Physics of Continuous Radiation Absorption in Stellar Photospheres. ... Continuous Radiation Absorption in Stellar Photospheres of Various Spectral Classes. Solar Type Photospheres. ... Characterisics of Absorption Lines. ... Interstellar Absorption Lines, Their Features. ... Physical and Dynamic Features of Interstellar Medium, Which Follows from Observations of Interstellar Absorption Lines. ...

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• Stellar Astronomy
• Practical Astrophysics
• Extragalactic Astronomy

October 30-31, 1992 . ... Modified images of the October 30-31, 1992 event. (a) - This NRH image is adapted to show a very bright loop-like source over AR 7321 near the SW-limb identified with the X1.7 soft X-ray LDE event peaked on 30d at 17:30 UT (see the GOES-7 soft X-ray plot also at the upper right corner). ... Here and hereafter, the white features are radio filaments. (c) - This modified NRH image shows some large scale microwave blob chains and structures. ...

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• http://www.izmiran.rssi.ru/~ichertok/CHAINS/ANNOUNC/radio.htm
• http://www.izmiran.rssi.ru/~ichertok/CHAINS/ANNOUNC/931102.htm
• The 14 July 2000 meter-wavelength dynamic radio spectrum

pn Timing mode: - what causes the brighter line? ... only one CCD (200 x 64 pixel) - same as in flight Screen shot from oscilloscope Start of frame PHI-Pulse New line (INIT) TIMING CCD readout in Timing Mode (M.K.) CAMEX CAMEX CAMEX Line 20 - 39 Line 0 - 19 1st readout 2nd readout 10th readout Pseudo (macro) CCD: 64 x 200 macro pixel, contains information from 10 real CCD readouts Line 180- 199 Result of hiccup ? First ,,macroline" contains only ONE CCD line, set to BAD anyhow ? ...

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• Dark features
• General Comments
• Procedure

Titan . ... Hubble Space Telescope Images of Titan's surface . ... Later that year, it will release the European-built Huygens probe for a descent through Titan's atmosphere. ... This artist's rendering shows the European Space Agency's Huygens probe descending into the atmosphere of Saturn's moon Titan after being released by NASA's Cassini spacecraft. ... This artist's rendering shows the Huygens probe on the surface of Saturn's moon Titan after being released by NASA's Cassini spacecraft. ...

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• APOD: August 6, 1998 - Infrared Horsehead
• APOD: September 22, 1998 - M61: Virgo Spiral Galaxy
• Procedures for Observations

... NGC 1530 is one of the largest barred spiral galaxies in the northern sky, with bright CO emission. ... To trace molecular gas, we observed the line, with the IRAM Interferometer. ... Properties of NGC 1530 and observational results . ... Then in a frame rotating with the potential, the periodic orbits are ellipses either parallel to the bar ( ) or perpendicular ( ), depending on the radius of the orbit. ... We observed the molecular gas in the bar of NGC 1530, a barred SBb spiral in the line. ...

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• G349.7+0.2
• G111.7-2.1