... We construct a composite quasar spectrum from 149 HST FOS spectra of 80 quasars with mean redshift . ... The continuum longward of 1000? can be modeled as a power law with . ... The break in the power--law index is a feature expected in Comptonized accretion--disk spectra. ... The spectral features in the sub--Ly region of AGN spectra provide critical insights into the physical processes around the central engine, and they become accessible to IUE and HST at intermediate redshift. ...

... The picture shows a 2-dimensional sketch of the outflowing wind of a quasar (Elvis 2000, Astrophysical Journal , vol.545, p.63-76). In the funnel-shaped disk wind Elvis (2000) model a wind arises from a restricted range of radii on the accretion disk around the central black hole. Initially the wind makes a large angle to the disk plane (and so is roughly cylindrical). ... Looking through the quasi-cylindrical part of the wind we see UV and X-ray warm absorbers. ...

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... 13.08.2014 . ... The easily visible central ring is about one light-year across, but this remarkably deep exposure - a collaborative effort combining data from three different large telescopes - explores the looping filaments of glowing gas extending much farther from the nebula's central star . ... Publications with keywords: Ring Nebula - deep field . Publications with words: Ring Nebula - deep field . ... M57: The Ring Nebula . Ring Nebula Drawn . ... Ring Nebula Deep Field . ...

. Pulkovo Observatory of Russian Academy of Sciences is situated . near Saint-Petersburg. It was founded in 1839. 196140, Saint-Petersburg, Pulkovskoye chaussee 65/1 . English version . Russian version . This page has been accessed times since May 1, 1999.

This Hubble Space Telescope image reveals a bright starlike glow in the center of the interacting galaxy Markarian 231, the nearest quasar to Earth. Quasars are powered by a central black hole that heats the gas around it to unleash tremendous amounts of energy. ... NASA/ESA/The Hubble Heritage Team (STScI/AURA)-ESA/Hubble Collaboration/A. Evans (Univ. of Virginia, Charlottesville/NRAO/Stony Brook Univ.) ...

... Flux density at 1 GHz (/Jy): 1040 . ... Notes: This is the remnant of the SN of AD 1054. ... Optical: Strongly polarised filaments, diffuse synchrotron emission, with `jet' faintly visible. ... VLA at 1.4 GHz, radio detection of `jet'. ... Velusamy 1985, MNRAS, 212, 359. ... Aller & Reynolds 1985, ApJ, 293, L73. ... Comparison of VLA observations at 74 MHz, 327 MHz, 1.5 GHz and 5 GHz for spectral index studies. ... VLA at 5 GHz (1".4) and HST multi-epoch observation for proper motion studies. ...

... 2014 August 13 . Rings Around the Ring Nebula . Image Credit: Hubble , Large Binocular Telescope , Subaru Telescope ; Composition Copyright: Robert Gendler . ... There is much more to the Ring Nebula (M57) , however, than can be seen through a small telescope . ... The Ring Nebula is about 2,000 light-years away toward the musical constellation Lyra . Follow APOD on: Facebook , Google Plus , or Twitter . ... About APOD | ... NASA Official: Phillip Newman Specific rights apply . ...

Sydney, December 3 4, 2009 . ... Rationale . ... The workshop on т??Diffuse gas in and around the Milky Wayт?? is designed to bring together researchers working on atomic and ionised gas associated with the Milky Way and the Magellanic system. The workshop will highlight new data from the Parkes Galactic All-Sky Survey (GASS) of H i emission, the WHAM-South survey of HЮБ emission, and Areciboт??s GALFA survey of Galactic H i . ... Galactic corona . Milky Way dynamics . ...

... Gallery . ... The 9" Oddie refractor, 188?- ... Sidebar Left . Sidebar Top . No Sidebar . Sidebar Bottom . Sidebar Right . ... Title: Snow around the Oddie . Description: NOTE: All images are copyright and must not be reproduced or mirrored in any form without written permission. ... Snow around the Oddie NOTE: All images are copyright and must not be reproduced or mirrored in any form without written permission. Powered by Gallery 3.0.9 (Chartres) . ...

. Ryoanji Temple (with its famous rock garden) and around: page 17 . d22. Kyoto city, as viewed from the hill. Central part of the panorama. previous page | title page | jump to normal size | index | next page

... There are 4 bands of 100 Mhz . ... Each scan has 8 100 Mhz band separated by 85 Mhz . ... Fig 1: average the 10 on,off pairs and the two polarization's. The blue dashed lines are the expected locations of the lines. ... Fig 2: This plots the spectra before averaging the two polarization's. Black is polA and red is polB. Fig 3-4: The individual on/off pairs (one 100 Mhz band at a time). ... Two 680 Mhz bands were measured: 8000 to 8600 Mhz (space by 85 Mhz) and 8 100 Mhz bands 8600 to 9500 Mhz. ...

Next: NICMOS Coronagraphic Surveys-Preliminary Results Up: No Title Previous: STScI NICMOS Software . NICMOS Coronagraphic Surveys-Preliminary Results . ... Observations with NICMOS . ... The Evolution of Stars seen with ISOCAM - the Need for NICMOS and VLT Follow Up. ... Results . ... The Formation and Evolution of LMC Rich Star Clusters: NGC 1818 . ... HST-NICMOS Observations of Galactic Bulges: Red Nuclei in Nearby Galaxies . ... Investigating the Evolution of Quasar Host Galaxies with NICMOS . ...

spaceweb@oulu.fi - last update: 25 November 1998, 2200 UT . Diffuse aurora are found on the equatorward part of auroral oval , in the region of the so-called central plasma sheet (CPS) precipitation most likely mapping to inner plasma sheet , where magnetic field is almost dipolar (see isotropic boundary ). ... The strongest diffuse auroras are found on the post-midnight sector, i.e., they are produced mainly by electrons. ... First space observations were by Lui and Anger (1973). ... Space Sci., ...

... 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." ...

Apr 13 2015 Sagitta - The Arrow IC 4997 12mmT4 17mmT4 Planetary Neb 1 PB,PS,R,CENTRAL REGION BRT ,W/OIII,HELPS MUCH,BM,FHALO DET AROUND MIDDLE,R=G VB,MS,BNUC,HISB,W/OIII,BRIGHT BLUE, BRT CENTRAL DISC WITH FAINT HALO,ALMOST *,R=G Jul 05 2008 31 Sep 10 2004 31 NGC 6838 M71 Globular CL,VL,VRI,PMC,*11.16 Mar 22 2004 12.5 12mmT4 25mm Sep 23 2003 31 25mm Aug 20 2003 31 Jul 30 1981 12.5 ...

... With enough velocity, a spacecraft can break loose from the Earth's gravity and enter an orbit around the Sun, like that of a planet. If it then orbits the Sun with the same period as the Earth--one year--it may keep a fixed position relative to Earth. ... If the distance is just right--about 4 times the distance to the Moon or 1/100 the distance to the Sun--the spacecraft, too, will need just one year to go around the Sun, and will keep its position between the Sun and the Earth. ...

... Here some data observed on the 6m telescope with IFP installed in the OLD focal reducer are presented. ... Mkn 3: velocity field . ... NGC 5252: [OIII] image . ... NGC 5252 was observed 23 Feb. 1998 in the [OIII]5007 emission line with CCD TK1024 as detector. ... We observed the ionized gas velocity fields of the spiral galaxies with two purpose. ... Restored velocity field of NGC 157 in the reference frame rotating with the pattern speed overlaid on the Ha image of the galaxy . ... NGC 4100 . ...

... Resembling a gigantic hubcap in space, a 3,700 light-year-diameter dust disk encircles a 300 million solar-mass black hole in the center of the elliptical galaxy NGC 7052. ... Because the front end of the disk eclipses more stars than the back, it appears darker. ... Despite its size, the disk is 100 times less massive than the black hole. ... The bright spot in the center of the disk is the combined light of stars that have crowded around the black hole due to its strong gravitational pull. ...

arxiv:1401.4469 Волокно "космической сети", обнаруженное по лайман-альфа излучению около квазара на большом красном смещении (A cosmic web filament revealed in Lyman-alpha emission around a luminous high-redshift quasar) . ... Authors: J. Casares et al. arxiv:1401.2885 Планеты очень малой плотности вокруг Kepler-51 (Very Low-Density Planets around Kepler-51 Revealed with Transit Timing Variations and an Anomaly Similar to a Planet-Planet Eclipse Event) . Authors: Kento Masuda . ...