... Bad Astronomy . ... Bitesize Astronomy . ... Last week's Snack talked about how black holes can affect the environment around them in such a way as to be very bright . ... It's a common misconception that black holes always have matter swirling into them. ... As this matter gets closer and closer to the black hole it piles up and a large, fairly flat disk forms. This is called the accretion disk , because matter from this disk accretes (that is, falls in) on the black hole. ... 2008 Phil Plait. ...

Browse the articles below for new ideas for your classroom. Mercury September/October 2005: Astronomy Education and Public Outreach: Steps and Missteps Toward an Emerging Profession (pdf) . Focus on Education articles as they appeared in Mercury: . ... March/April 2000: . ... Education Newswire articles as they appeared in Mercury, by issue. ... January/February 2000 . November/December 1999 . ... March/April 1999 . ... November/December 1998 . ... November/December 1997 . ...

... Article text . ... Article should be formatted according to the present rules, using the styles containing in the attached file example.doc . ... For example, article name should be typed in string Here Is the Paper Title , using style "title paper", etc. ... Title part of article Paper Title (style Title Paper . ... It is necessary to use style text paper for the body of article. ... In the text of article there should be links to every Figure and Table: Fig. 1 and Tab. 1 accordingly. ...

Lunar Libration . Articles | ... Actually, a slight rocking motion, called libration,* makes about 59% of the Moon's surface visible from our planet Earth -- though only 50% at any one time. ... Add to that, the approximate 1.5 degree tilt of the Moon's equator to the ecliptic, and you have the inclination of the Moon's equator to the plane of its orbit around Earth at some 6.5 degrees (5 + 1.5 = 6.5). ... Re-published on Astronomy Net with permission of the author. ... www.astronomy.net . ...

... The GALFA Continuum Transit Survey group ( GALFACTS ; PI: A. R. Taylor) has conducted several test observations and will begin an all-sky full-Stokes continuum survey later this year with the new P-ALFA spectrometer. ... Sample Perseus images of GALFA H I 21cm-line and full-Stokes continuum emission are shown below along with maps of molecular (CO) gas, thermal dust, and ionized gas optical emission for comparison. ... The GALFA H I emission appears to envelop the molecular cloud gas traced by CO. ...

... Laboratory for Spectroscopy of Molecular Structures . ... News . ... A new article entitled Description of optical properties of cholesteric photonic liquid crystals based on Maxwell equations and Kramers-Kronig relations has appeared in Physical Review E. Congratulations to Grigoriy Ksyonz on his first publication! . 25 th February 2013 . ... 22 nd November 2012 . ... 22 nd February 2012 . 4 th Workshop on Liquid Crystals for Photonics 2012 will take place in Hong Kong December 9-11, 2012. ...

... Tonight's Sky . ... Sky this Month . ... Star Atlas . ... stars . ... The Sky This Week: April 1 - 10 . ... Observing springtime deep-sky objects with a large telescope . ... Why do some stars appear to flash a variety of different colors when you look at them through a telescope? ... So, Earthт??s atmosphere will bend some colors from especially bright stars more so than others, which makes the source look like itт??s flashing colors. Get instant access to subscriber content on Astronomy.com! ...

... Archives . ... All models are wrong, but some are useful. ... One of the most frequently cited quotes appeared in an article, titled The End of Theory: The Data Deluge Makes the Scientific Method Obsolete which I liked it very much because it cited the updated maxim by Peter Norvig, Google?s research director, . ... The article addressed perspectives of the new Petabyte data analysis era, where the traditional modeling and testing are not likely feasible. ... Chandra Blog . ... SAMSI AstroStat Prog....

... К вопросу возможной модификации двигателя Шкадова и ее перспективах для решения некоторых задач SETI . ... А.Л.Зайцев . ... КОНЕЦ СОЦИУМА И ПРОБЛЕМА SETI . Л.М.Гиндилис . ... ОБОСНОВАНИЕ METI . ... Борис Николаевич Пановкин о познаваемости мира и о возможности связи с внеземными цивилизациями (к 80-летию со дня рождения) . ... Alexander Zaitsev . ... КНИГА ОБ ЭВОЛЮЦИИ И ВНЕЗЕМНЫХ ЦИВИЛИЗАЦИЯХ (Рецензия на книгу А.Д.Панова Универсальная эволюция и проблема поиска внеземного разума (SETI) . ...

Астрономия и Космос Небесные тела Планеты и их спутники . Видимым парадом планет называется планетная конфигурация, когда пять ярких планет Солнечной системы (Меркурий, Венера, Марс, Юпитер и Сатурн) в своем движении по небосводу подходят друг к другу на близкое расстояние и становятся видны в одно время в небольшом секторе (10 - 40 градусов) неба. ... Из выше описанного видно, что парад планет можно наблюдать, либо вечером, либо утром. ... Не пропустите ОСЕННИЙ ПАРАД планет 2002 года! ...

. Inbound . Outbound . AE8 . Previous slide . Next slide . Back to first slide . View graphic version .

... HST . What is the offset in the U2 direction that can be taken before a gap appears? ... HST Peer Review Process . ... HST Overview . Overview . ... Retrieving HST Data . ... HST Science Year in Review . ... What is the offset in the U2 direction that can be taken before a gap appears in the coverage of the sky between the two pointings? ... Same question for a U3 offset. ... This should allow you to accurately address the issue of optimal offsets in the mosaic. ...

... Polyhedral divisors and SL2 -actions on ane T -varieties. ... Michigan Mathematical Journal, to appear. See also Prepublication de l'Institut Fourier, hal-00595725; arXiv:1105.4494v1, 26 pp. ... Journal of Algebra, to appear. See also arXiv:0912.1474v2, 12 pp. ... Finite-dimensional subalgebras in polynomial Lie algebras of rank one. ... Homogeneous toric varieties. ... Sbornik: Math. 201 (2010), no. ... Journal of Pure and Applied Algebra 213 (2009), no. ... Journal of Algebra 304 (2006), no. ...

Umbriel . Uranus II . Umbriel [UM-bree-ul] is the darkest satellite of Uranus. It is about the same size as Ariel and has about the same density. The surface appears to be old with large craters and does not change much from one location to another. Near the top is a puzzling bright ring called the fluorescent cheerio . ... Dark regions are represented as red and bright regions are represented as blue. The two white regions are bright ejecta from two fresh craters. ...

Umbriel . Uranus II . ... It is about the same size as Ariel and has about the same density. The surface appears to be old with large craters and does not change much from one location to another. ... Orbital period (days) . ... Visual geometric albedo . ... This image is a polar stereographic projection of the southern hemisphere of Umbriel. ... Dark regions are represented as red and bright regions are represented as blue. The two white regions are bright ejecta from two fresh craters. ...

... 2005 August 8 . Mars to Appear Normal This August . ... Regardless of numerous urban legends circulating, Mars will appear relatively normal in August. October is the best month to see Mars this year. ... As Earth catches up to Mars in their respective orbits around the Sun, Mars will keep rising earlier in the night. On 2005 October 30, Earth will have caught up to Mars and the planets will be the nearest to each other in their orbits -- this time around. ... About APOD | ...

... Jelly Donut Shaped Rock Appears on Mars . ... Credit Copyright: Mars Exploration Rover Mission , Cornell , JPL , NASA Explanation: What if a rock that looked like a jelly donut suddenly appeared on Mars? ... The unexpectedly placed rock, pictured above , was imaged recently by Opportunity after not appearing in other images taken as recently as twelve Martian days ( sols ) before. ... Publications with keywords: Mars . Publications with words: Mars . ... Opportunity s Decade on Mars . ...

... Circumstellar disc of beta Pictoris: constraints on grain properties from polarization. To appear in the Astronomy & Astrophysics . abs , src , ps ] . ... Dust influx to Titan from Hyperion . ... abs ] . ... Characteristics of bulges and disks in interacting galaxies . ... Dust grains around Herbig Ae/Be stars: porous, cometary-like grains? ... To appear in the Astronomy & Astrophysics Supplement . ... Finally, Links may lead you to more options (e.g. via the LANL preprint system). ...

Note added 3 June 2003 to . ... Furthermore, (iii) its orbital plane gave the satellite at apogee a velocity tangential to the ecliptic, helping it stay in the plasma sheet, rather than cut across it. ... Figure #1 Point A in this drawing is perigee (just above Kourou), B is apogee , the solid line perpendicular to the Earth axis is a cut through the equatorial plane, and its continuation parallel to the ecliptic represents a cut through the plasma sheet (not to scale). ...

On-line Journal This page is the home of our on-line directory of publications. Included below is an index of all papers published in the Irish Astronomical Journal from 1950 to 1994 inclusive. We also have an index of papers which have appeared since 1994. Here you will also find the contents of the current, previous and all past issues of the Irish Astronomical Journal since 1995. ... Index - An index of papers from 1950-1994 . ... Current - Contents and examples from the current issue . ...