... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... September Perseid meteors captured by the . ... Its occurrence provides astronomers with interesting new data about the hidden trails of meteoroids тАФ small bodies ranging in size from fine dust particles to objects of marble-size and larger тАФ in the solar system and their supposed sources: comets and asteroids passing through the inner solar system. ... The particular comet that created the September Perseids is unknown...

... September 23, 1998 . Autumn and the Active Sun . ... This Autumnal Equinox finds an increasingly active Sun steadily approaching a solar cycle maximum expected around the year 2003. The solar activity cycle is driven by a periodic winding up of the Sun's internal magnetic field. ... Growing in number , the intricate structures visible are the Sun's hot active regions with temperatures over a million degrees Fahrenheit and their associated magnetic loops. ... About APOD > . ...

Astronomy Picture of the Day . ... Credit Copyright: Courtesy TRACE Team , NASA Explanation: As the Sun heads South, crossing the celestial equator today at 1:37 a.m. Eastern Time, Autumn begins for Earth's Northern Hemisphere. This Autumnal Equinox finds an increasingly active Sun steadily approaching a solar cycle maximum expected around the year 2003. ... September . ... Publications with keywords: Sun - equinox - solar cycle . Publications with words: Sun - equinox - solar cycle . ...

... Bringing news from across the Universe to children all around the world . ... Galaxies are like cities of stars in the Universe. ... Dark galaxies are very far away in the Universe. They are thought to be the building blocks that helped to create the big star-filled galaxies that we see today, like our own Milky Way Galaxy. ... That s why the astronomers looked for dark galaxies around incredibly bright galaxies called quasars , which are also very far away. ...

... Projects . Data transfer . ... PPTA projects and allocations . ... Time active (d) . ... Not active . ... PPTA data release 2 . ... unallocated Study timing noise in PPTA pulsars . ... unallocated Reprocess P140 data with PPTA pipeline . ... unallocated Consider the optimal observing strategy for PPTA pulsars . ... unallocated Application of cyclic spectroscopy to PPTA pulsars . ... Profile Domain Pulsar Timing: Developing and applying techniques to PPTA data. ... Tue, 24 Nov 15 03:36:53 +0000 . ...

... October 18, 1999 . NGC 3603: An Active Star Cluster . ... Explanation: NGC 3603 is home to a massive star cluster, thick dust pillars, and a star about to explode . The central open cluster contains about 2000 bright stars, each of which is much brighter and more massive than our Sun . ... These stars are less massive than our Sun, demonstrating that great numbers of low-mass stars also form in active starburst regions . ... About APOD > . ...

We present Spitzer 3.6-160 О?m images, Spitzer mid-infrared spectra, and JCMT SCUBA 850 О?m images of the Sombrero Galaxy (NGC 4594), an Sa galaxy with a 109 Msolar low-luminosity active galactic nucleus (AGN). The brightest infrared sources in the galaxy are the nucleus and the dust ring. ...

... RATAN-600 data for the BL Lacertae objects (multi-frequency catalogue, Version 1.0) . GPS radio sources . ... Kovalev et al. (2009) also investigated the correlation between radio emission and gamma-ray flux (using Fermi-LAT data after the first 3 months of observations) for 135 AGNs. ... Moreover, the correlation between high-frequency radio emission (at 37 GHz) and gamma-ray emission (100 MeV.100 GeV, Fermi-LAT data) for 249 northern AGNs was studied by Nieppola et al. ... GHz) . ...

... Planets . ... Earth Satellites . ... The newly discovered ?mega-Earth? ... Its sibling, the lava world Kepler-10b, is in the background (the two planets? proximity is grossly exaggerated) .€а Kepler-10c has a diameter of about 29 000 km, 2.3 times as large as Earth, and weighs 17 times as much. ... The first mega-earth to be discovered is Kepler-10c which orbits a star lying about 560 light years from the Sun in the constellation Draco. ... Astronomers Find a New Type of Planet: The ?Mega-Earth? ...

... Over the first 4 years, its X-ray telescopes eROSITA and ART-XC will survey the whole sky with a record sensitivity in the 0.5-10 keV energy band. ... The goal of the second international Spectrum-RG conference is to discuss the different scientific topics addressed by the mission, synergies with surveys at other wavelengths, and requirements to follow-up observations.Contributed talks and poster presentations are invited on the topics related to the SRG science goals. ... Active galactic nuclei . ...

... Прекрасный вклад в развитие малыша – это игровой развивающий центр «Чудесный сад 360» от Bright Starts. ... В развивающем центре имеется специальный сектор пианино, который имеет возможность работы в нескольких режимах: различные звуки, мелодии и пианино. ... Развивающий центр 'Чудесный сад 360' станет настоящим подарком для любого ребенка. ... Бюстгальтеры и топы . ... Материал верха: натуральная кожа . ... Материал подошвы: термопластиковая резина . ... Материал: натуральная кожа...

Galaxies are diffuse objects which are imaged against a background of finite brightness and noise. Galaxies which have the maximum contrast with respect to this background are the ones that are first discovered. ... These galaxies have been missed to date but active surveys for them are underway. ... In this page we present several examples of these newly discovered Low Surface Brightness galaxies as well as examples of high surface brightness galaxies. ...

... Meta Index / Home Page This section documents the parameters recognized by this task (if any). ... string . ... Unless this parameter is set, the previous prime source index number is retained. changeattitude . ... Unless this parameter is set, the previous attitude (stored in the header) is retained. srclist . ... If primestyle is active and set to `label', this parameter gives the value of the LABEL column of the source that it is desired the PRIMESRC keyword should point to. primeindex . ...

... Magnetic storms online . ... Geomagnetic activity forecast . ... September : 2015 . ... No magnetic storm is expected . From 10 September 2015 to 6 October 2015 the following magnetic storms and disturbances are expected: . October 05, 2015 geomagnetic disturbances . September 12, 2015 geomagnetic disturbances . ... September 21, 2015 geomagnetic storm of level G1 (minor) . ... September 20, 2015 geomagnetic disturbances 10 September 2015 - 6 October 2015 . 09.09.2015 . ...

... Ceresт?? bright spots show unexpected changes . ... CERES | ... Observations made using the HARPS spectrograph at the European Southern Observatory s (ESO) La Silla Observatory in Chile have revealed unexpected changes in the bright spots on the dwarf planet Ceres. Although Ceres appears as little more than a point of light from Earth, careful study of its light shows not only the changes expected as Ceres rotates, but also that the spots brighten during the day and also show other variations. ...

... What Have We Learned About Halley's Comet? ... Until the Russian VEGA and the European Giotto spacecraft flew by Halley's core, people had never really seen the heart of a comet! ... showed that the comet's nucleus was about 15 kilometers long and 8 kilometers wide. ... The Giotto spacecraft came within 600 km of the comet's nucleus, surviving the great gas and dust storms of the inner coma. ... Comet Halley's dark icy nucleus (center) and bright "jets'' of gas and dust as photographed by "Giotto''....

The Variable Gamma-Ray Source 2CG 135+01 ApJ, 497:L89-L91, 1998 7 h gamma AGN variability . gamma-radio-AGN-variability ADS query . ... Model for the High-Energy Emission from Blazars 1993ApJ.. ... Possible Production of High-Energy Gamma Rays from Proton Acceleration in the Extragalactic Radio Source Markarian 501 astro-ph/9803241 K.Mannheim . ... A theoretical unifying scheme for gamma-ray bright blazars astro-ph/9807317 G. Ghisellini, A. Celotti, G. Fossati, L. Maraschi, A. Comastri . ...

Table of Contents - Subject Index - Author Index - . Astronomical Data Analysis Software and Systems IX . ... Reduction of Adaptive Optics Images . ... GBT Active Optics Systems and Techniques . ... A User-Friendly Way to Optimize Adaptive Optics: NAOS Preparation Software . ... QuickLook Data Reduction Pipeline - Keck Adaptive Optics Real Time Data Reduction Software . ... NAOS Computer Aided Control: an Optimized and Astronomer-Oriented Way of Controlling Large Adaptive Optics Systems . ...

... Part 00 PDF Introduction and Overview . ... Part 02 PDF Stars Phenomenology . Part 03 PDF Stellar Structure . Part 04 PDF Stellar Evolution . ... Part 06 PDF Basic Properties of Galaxies . Part 07 PDF Chemical Evolution . Part 08 PDF Stellar Dynamics . Part 09 PDF Spiral Galaxies . Part 10 PDF Elliptical Galaxies . Part 11 PDF Dwarf Galaxies . Part 12 PDF Active Galaxies . Part 13 PDF Large Scale Structure . ... Part 16 PDF Galaxy Evolution . ...

... During the analysis of the surveys carried out on RATAN-600, it was found that almost one fifth of the detected sources shows significant radio flux variations. ... We used the data from "Cold" radio surveys carried out with RATAN-600 in 1980-1994 to search for radio sources with significant flux variability. ... On possibility of detection of variable sources using the data of Cold surveys carried out on RATAN-600. ... Detection of Variable Sources Using the Data of "Cold" Surveys. ...