... Tonight's Sky . ... Observing . ... Star Atlas . ... Astronomy for Kids . ... How close to each other do two stars have to be for one to steal material from the other? ... For two stars of the same mass, if the donor starт??s radius exceeds 38 percent of the binary separation, the accretor will steal mass no matter the separation. ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

Еще в разделе: (Показать все результаты (>6768) - www.astronomy.com/ )

• Astronomy Magazine - Interactive Star Charts, Planets, Meteors, Comets,
• Observing a gigantic eruption of solar material | Astronomy.com
• Does the time it takes different methods to create all the elements coincide

... Science . ... Science Users Information > Science Activities > PhD Thesis Topics offered by ESO Faculty Members > Thesis Topic: Why most supermassive black holes do not accrete material . ... Implicitly, we will also better understand why most supermassive black holes fail in accreting material. ... 1) Analyse multi-wavelength data for selected galaxies to describe and quantify the different physical phenomena in their centres, and most notably to derive their central supermassive black hole masses....

Еще в разделе: (Показать все результаты (>66733) - www.eso.org/ )

• Titan Observed Through Nine Different Filters on November 26, 2002 | ESO
• Titan Observed Through Nine Different Filters on November 26, 2002 | ESO United
• Titan Observed Through Nine Different Filters on November 26, 2002 | ESO...

In early mid-infrared observations (c 1970) two prominent dust emission features were discovered. ... Soon after the discovery of the silicate features another feature at about 11.3 microns was discovered in the spectra of some carbon stars, not as wide or as strong as the silicate features but still thought to be due to a solid material. ... less common features: extreme carbon stars, the AlO/silicate complex, the "unidentified infrared" features, unusual silicate features . ...

Еще в разделе: (Показать все результаты (>16766) - www.stsci.edu/ )

• Studying Proto-Planetary Nebulae
• Terrestrial Silicates Compared to Astronomical Silicates
• Dusty HII Regions and Planetary Nebulae

Nalini Chandra & John Percy, University of Toronto . ... Some works to refer to when using multicultural astronomy in your classroom: . ... Nalini Chandra is a doctoral candidate at the University of Toronto in the Department of Curriculum Teaching and Learning at OISE/UT. ... OISE-University of Toronto . ... John Percy, Professor of Astronomy at the University of Toronto, is a Past President of the ASP, and is active in astronomy education at all levels. ... ASP Multicultural Astronomy Resources . ...

Еще в разделе: (Показать все результаты (>1510) - www.astrosociety.org/ )

• ASP: Guest Observer
• ASP: Cosmic Collisions
• ASP: The Fiery Birth of Chondrules

... 2009 July 6 . Unknown Dark Material on Mercury . Credit: MESSENGER , NASA , JHU APL , CIW . ... Pictured above on the lower right, a large crater -- about 100 kilometers across -- has unusual dark material of unknown composition near its center. ... If so, the composition of the dark mound might be similar to the composition of some mysterious dark ring s also recently discovered on Mercury. Alternatively, the dark material could be related to an unusual composition of the impacting rock . ...

Еще в разделе: (Показать все результаты (>8147) - www.sai.msu.su/ )

• APOD: 2001 January 22 - A Two Toned Crater on Asteroid Eros
• APOD: 2008 May 13 - Ancient Craters of Southern Rhea
• APOD: 2013 November 30 - Surprising Comet ISON

The coordinates, diameters, altitudes and morphological features of all the craters of Mars exceeding 10 km in diameter, totaling 19 308, are compiled. ... The catalogue is intended for use by investigators of Mars, students, in comparative planetology and in the selection of craters for naming. ... 1 one terrace . 2 many terraces . ... 6 many hills and one ridge . 7 one hill and many ridges . ... 1 one crater . 2 many craters . ... Sample craters of different morphological categories . ...

Еще в разделе: (Показать все результаты (>161) - selena.sai.msu.ru/ )

Educator's Guide to Impact Craters . ... Just about all craters have deep central depressions, raised rims, and a blanket of ejected material surrounding them. ... Look for classical cratering features: basin, raised rim, ejecta blanket (material excavated from the crater and dumped around it, visible as white flour on the colored powder), and rays (material shot out at high velocity forming lines pointing directly away from the impact site). ... The material lies like a blanket around the crater. ...

Еще в разделе: (Показать все результаты (>9141) - www.arcetri.astro.it/ )

• Mars' Moon Phobos
• Asteroid Vesta
• Martian Clouds

... Laboratory and theoretical modelling of the UV bump on the interstellar extinction curve is a very popular topic in dusty investigations. ... feature is illustrated by Fig. 10 where the profiles were calculated using the model of graphite spheres. Figure 10: Normalized extinction efficiencies for graphite spheres. ... The lower panel shows the summary extinction of two graphite spheres with radii and (from upper panel) taken in equal proportions. ...

Еще в разделе: (Показать все результаты (>313) - www.astro.spbu.ru/ )

• Extinction properties (transmitted radiation)
• Database of Optical Constants -- Level: welcome
• Silicate minerals

Orbital intersection . ... Structure of Taurid stream . ... Meteoroid swarm and Taurid fireballs . ... The following four diagrams schematically show four different Taurid orbits and the orbits of Earth and Jupiter. ... The Taurid stream contains particles (small, solid grains) at different stages of their precession cycles. ... The study of when a meteor stream can produce a meteor shower is the study of when precession brings orbits to intersection with Earth, or e.g. with Mars . ...

Еще в разделе: (Показать все результаты (>3075) - star.arm.ac.uk/ )

• Featured Image | International Year of Astronomy in Ireland | Astronomy 2009
• Armagh Observatory
• Leonids 2001

... The Sun of our solar system is a typical star of intermediate size and luminosity. ... The Sun has a very complex surface magnetic field created by convective flow of the electrically conducting solar material. ... The escaping hot coronal plasma is called the solar wind . ... See the table below for the observed features above the Sun's surface. ... Chromospheric features . Coronal features . ... dense clouds of material suspended above the surface of the Sun by magnetic field line loops . ...

Еще в разделе: (Показать все результаты (>941) - www.iki.rssi.ru/ )

• Mars' Moon Phobos
• From Stargazers to Starships
• Titan Press Release

... ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Murchison Radio-astronomy Observatory . ... Parkes radio telescope . ... Parkes | ... Parkes projects/positions database . ... R.J. Sault, G.J. Carrad, P.J. Hall, J. Crofts, 2000, ``Radio path length correction using water vapourradiometry'' submitted to Proceedings of WARS 2000 . Bob Sault, Peter Hall, Graeme Carrad, 1999 "Atmospheric phase correction for the ATCA" , presented at URSI 1999 (Toronto, Canada). ...

Еще в разделе: (Показать все результаты (>27235) - www.atnf.csiro.au/ )

• PPTA Wiki | Observing / RFI
• giant_radio_galaxies
• Post-Correlation - Features

... Observing . ... Home Education Workshops at Adorama Astronomy Workshop: Observing Variable Stars from the City ? February 15, 2015 . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... Presented by€а Adorama €аFor the Amateur Astronomers Association of New York . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

Еще в разделе: (Показать все результаты (>623) - www.aaa.org/ )

• Astro Imaging Workshop: Planetary Astro Imaging with a DSLR ? December 7, 2014
• Amateur Astronomers Association of New York ? Amateur Astronomers Association
• Solar Observing, Grand Army Plaza, Brooklyn ? Amateur Astronomers Association

Astronotes Armagh Planetarium's Stellar Blog! ... August . ... Posted on December 1, 2011 | No Comments St Patrick?s Academy in Dungannon is hosting a fantastic public event for stargazers this Saturday evening. This local school has its own observatory and astronomy club for the students [ ] . Continue Reading.. Posted on November 17, 2011 | ... Posted on October 10, 2011 | ... Posted on September 29, 2011 | ... Posted on August 18, 2011 | ... Posted on June 21, 2011 | ...

Еще в разделе: (Показать все результаты (>2799) - www.armaghplanet.com/ )

• Tycho Crater's spectacular central peak | Astronotes
• Stellar Nursery NGC 6357: Image of the Month | Astronotes
• The Solar System's Grand Tack | Astronotes

Еще в разделе: (Показать все результаты (>3870) - xmm.vilspa.esa.es/ )

• Observing mode support

... Fill out the Application form . Attention: In the very unlikely case that you do not receive our reply within three business days after your form was sent, please check your spam folder and contact us at mim@mccme.ru . ... Please note that if you are applying for a scholarship (including AMS-NSF scholarships) you have to fill out the application form on the corresponding website and to provide recommendation letters and other required documents independently of the application process here. ...

Еще в разделе: (Показать все результаты (>494) - www.mccme.ru/ )

• Non-mathematical courses The non-mathematical courses offered are:
• Grants
• Program Costs

This is a list of all currently available observing modes in CIMA. Different modes are available depending on whether CIMA is run in pulsar or in spectral line mode. ... Note that the appearance of the windows refer to CIMA version 3.1 , which for most observing modes is slightly different than from CIMA version 2.3 and 3.0 and completely different from CIMA version 2.2. ... Non-ALFA . ... Pulsar cross calibration . ... Drift map . ... ALFA : indicates whether the observing mode works with ALFA . ...

Еще в разделе: (Показать все результаты (>5618) - www.naic.edu/ )

• Ed Rivera-Valentin
• CIMA Frequently Asked Questions
• Heiles Symposium Presentations

... This book uses many authentic sources such as factual texts, newspaper articles, features and TV schedules, instruction manuals, everyday signs, stories, quizzes, emails and diary entries. ... Чернила для принтера HP HP Photosmart 425. цвета: Cyan, Magenta, Yellow, Black, емкость баночек - по 100 мл. ...

Еще в разделе: (Показать все результаты (>1231) - astrokuban.info/ )

• TuHao Golden Watch with Diamonds Round Dial and Steel Band for Women Рубашка
• ЖЕНСКИЙ РЮКЗАК DAKINE JEWEL 26L Skmei 1040 Dual Movement LED Watch
• Set of 8pcs Hot Cartoon Minion Dave Characteristic 5 to 6cm Collection Figure

The following activities are included in the Universe at Your Fingertips guide. ... Clicking on each activity will take you to a "reviews" page where you can post a review, or read reviews posted by others who have used the activity. ... Activity Online . ... MOON AND PHASES . ... Observing Phases and Features . ... Modeling Moon Phases . ... SUN AND SEASONS . ... Observing the Sun Safely . ... Observing Where the Sun Sets . ... Making Pictures of Motion . ... Morning Star and Evening Star . ...

Еще в разделе: (Показать все результаты (>2496) - hea-www.harvard.edu/ )

• The Threads of Inquiry
• Introduction
• The AstroStat Slog Blog Archive Bayesian machine learning workshop, featuring

... Zacharias, N. & Zacharias, M. I. 1999, in ASP Conf. ... The USNO CCD Astrograph Catalog South (UCAC-S) project is a high precision astrometric survey of the entire southern hemisphere for the 7 - 16 magnitude range, aiming at an accuracy of 20 mas for 8-14 m stars. ... The ACT (Urban et al. 1998) and the Hipparcos and Tycho Catalogues (ESA 1997) are used as reference (UCAC-R), supplemented by an extragalactic link program carried out in parallel mainly at the Cerro Tololo (CTIO) 0.9-meter telescope....

Еще в разделе: (Показать все результаты (>1747) - www.adass.org/ )

• The NOAO Web-based Observing Proposal System
• Nightly Scheduling of ESO's Very Large Telescope
• Remote Observing With Java

... In this Mars Global Surveyor image of the Martian surface just south of Schiaparelli crater, dark lines appear to criss-cross light colored depressions. One tantalizing possibility is simply that the feature near.. ... A Distant Cluster of Galaxies . ... Oddly - most of them are spiral galaxies. This rich cluster of galaxies, named CL 0939+4713, is almost half way across the visible universe. ... On the far side of our Galaxy, gas clouds explode away from a small black hole. ...

Еще в разделе: (Показать все результаты (>111826) - www.astronet.ru/ )