From the Tunguska Space Body to the Evolution of the Protoplanetary Nebula . ... A model for the structure of comet nuclei is proposed based on the results of the investigations of carbonaceous substances from the epicenter of the Tunguska cosmic body (TCB) explosion. ... Editorial note: This paper suggests several new ideas about the solar nebula and the formation and composition of comet nuclei based on investigations of the Tunguska event. ...

... The Galactic low-mass X-ray binary GS 2023+338 was discovered during the burst on May 22, 1989 with the Japanise satellite Ginga (aka Galaxy). The flux reached 17 crabs (this unit of flux measurement is an bright X-ray source, Crab Nebula) at 10-35 keV. ... No other radio telescope worldwide carried out multi-frequency measurements. ... Upon 14 days the radio flux fell below the detection level at the RATAN-600 in relation to the decrease of the X-ray flux. ...

... Цвет: синий . Коллекция: Осень-зима 2015/2016 . ... Джемпер Zarina. ... Сезон: Осень-зима 2015/2016. ... Декоративная фигурка выполнена в виде лебедя и оформлена кристаллами Сваровски красного цвета. Фигурка будет вас радовать и достойно украсит интерьер вашего дома или офиса. ... Виды материалов: Стеклянные . ... Тиснение и цвет кожи уточняйте у менеджера при оформлении заказа.. ... Материал верха: искусственная лаковая кожа, текстиль . ... Материал: искусственная лаковая кожа, текстиль. ...

... 13 июня 2000 . ... Туманность Киля в инфракрасном свете . ... Пояснение: Звезды в туманности Замочная Скважина (Keyhole Nebula) начали формироваться приблизительно три миллиона лет назад. На фотографии , выполненной в инфракрасном свете в этой туманности , известной также под названием туманность Киля (Carina Nebula) или NGC 3372, видно множество ячеек поразительной звездной колыбели , находящейся нас расстоянии всего 9000 световых лет. ... А. Сергеев , оформление, 1999, 2000. ...

This directory contains material for running demonstrations of the routines in the IRAF.STECF package impol To run these demonstrations IRAF/ STSDAS is mandatory and the impol package must be loaded The directory is composed of the following files : reflneb.fits A 512x512 intensity image of a model reflection nebula demo_foc.cl demo_nicmos.cl IRAF cl scripts for running the demo's for the demo_wfpc2.cl three HST instruments and a SPECIAl (non-HST) demo_special.cl ...

... LINKS . ... Founded in 1971 by a group of enthusiasts and star aficionados, our association is now counting more than 130 members.As a national association we attract hobby astronomers from the whole country to our regular night-sky observations and to the meetings in our club at Dudelange. ... Club News . ... by topic : PDF File Download (360KB) . by title : PDF File Download (640KB) . ... Article about AAL in "Le Quotidien" newspaper of Juli 21 2005 - PDF File Download (132KB) . ... SOME LINKS . ...

As an obligatory preparing for the application to participate in the IAO a short report of National Olympiad of the current year with a set of all problems used on the Olympiad has to be presented by the applicating team. ... The final minutes (protocols written in Latin or Cyrillic in form of tables) of the Olympiad (evaluating of solutions of the students participated in the last stage of the Olympiad) should be included as well. ... Historical data of the National Astronomy Olympiad: . ...

Электронная библиотека астронома-любителя. ... библиотека . архив RSN . ... Ru.Space.News: . Апрель 1998 . ... Дата: 03 апреля 1998 (1998-04-03) От: Alexander Bondugin Тема: Hubble Reveals Details Of A Newly Born Planetary Nebula Привет всем! ... STScI-PR98-15 HUBBLE REVEALS DETAILS OF A NEWLY BORN PLANETARY NEBULA Astronomers have caught a peek at a rare moment in the final stages of a star's life: a ballooning shroud of gas cast off by a dying star flicking on its stellar light bulb. ...

... Лат. назв. Vulpecula, сокр. лат. ... Введено Яном Гевелием между Стрелой и Лебедем и первоначально названо Лисичка с Гусем. ... В созвездии Лисички есть яркая крупная планетарная туманность, очень причудливая по своей форме. Мессье заметил ее 1654 году и занес в свой каталог под номером 27. ... Нас разделяет 300 парсек. Кроме того, в Лисичке есть сравнительно яркая цефеида T, меняющая блеск от 5.9 m до 6.9 m за период 4.44 суток. ...

... Discovery of 47-s pulsations in the X-ray source 1RXS J225352.8+624354 / arXiv:1305.3439 , May 2013 . ... Optical spectroscopy of X-ray source IGR J22534+6243 / Atel # 4248 . ... Search for counterparts of newly discovered INTEGRAL/IBIS sources / Atel # 4166 . New INTEGRAL Galactic Plane Survey in SkyView / blog . Likely X-ray counterparts of newly discovered INTEGRAL/IBIS sources / Atel # 4165 . AGN in the INTEGRAL/IBIS 9-year Galactic hard X-ray survey / Atel # 4151 . ...

Supernova 1987A in LMC . One day in 1987, an astronomer by the name of Ian Shelton was making observations of the Tarantula Nebula in Large Magellanic cloud at Las Campanas Observatory, and he noticed something strange on his image. ... SN 1987A got as bright as 2.7, the only other recent SN even to come close was 1885A in M31 which got up to mag 6. ... Mag 4.5 . ... IAUC 4318 2/25/87 Type II? ... IAUC 7354 2/1/00 New structure in the inner ring . ... IAUC 7360 2/7/00 HST observation of new spot . ...

... Obviously, the size of the cavern is of the order of the Schwartzman radius. ... Thus, consideration of the inverse effect of pulsar radiation on the properties of accreting plasma makes the ejection possible even when the Schwartzman radius is smaller than the capture radius. ... If the cavern radius , the condition at its boundary can be written as . ... Apart from magnetic dipole radiation, the cavern may also contain relativistic particles (which are also reflected from the cavern boundary). ...

... The material in "From Stargazers to Starships" meets several important requirements of the national standards. Pages cited below are from National Science Education Standards National Academy Press, Washington 1995. ... For example: the sections on astronomy not only describe calendars and sundials (including their construction), but also the astronomy of the ancient Greeks, including two different ways in which ancient Greeks estimated the distance to the Moon. ...

... N. Kardashev and M. Popov informed the participants on the current IOC results. ... Kovalev). ... Agenda of the RadioAstron teleconference November 16, 2011 Corrections to the Agenda 1 2 3 4 5 6 IOC status and results Single Dish observation with RA VLBA observations to find best fringe search candidates Fringe search plan Early science program plan Tracking stations outside Russia N.Kardashev N. Kardashev / M.Popov V. Kostenko E.Fomalont M.Popov Y.Y. Kovalev / M.Popov /A.Alakoz ...

Yu.V.Lunyova, A.F.Kholtygin . Chemical evolution of the system of galactic planetrary nebulae , Astrophysics , 45 , 451-463 (2002) . Chemical evolution of the system of galactic planetary nebulae beginning from the early age of the Galaxy is investigated. We calculate radial and vertical abundance gradients of C, N, O, Ne, Ar, Cl and S depending of different ages of the central star of the nebula. It have been founded statistically significant dependence of abundance gradients with the age of central star.

... Межзвездная среда и туманности . ... Он назвал их "планетарными туманностями", поскольку они имели некоторое сходство с зеленоватыми дисками планет. ... планетарные туманности. ... Есть области, где межзвездный газ состоит из нейтральных атомов водорода ( области H I ) и области ионизованного водорода ( зоны H II ), которыми являются светлые эмиссионные туманности вокруг горячих звезд. ... Если звезда, которая находится в туманности или рядом с ней достаточно горячая, то она ионизует газ в...

... Bad Astronomy . ... Bitesize Astronomy . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... This time, for the next few weeks, I invite you to take a look at the Universe In Motion . ... The only motions we see easily are the rising and setting of the Sun, Moon and stars, but that is a reflection of our own Earth's rotation. ... The Crab Nebula is one such supernova remnant, and the nebula we see is the what's left of the tremendous explosion that spelled doom for the star...

... Up: Algorithms . ... Iterative algorithms with non-linear constraints are very attractive in image reconstruction with only a few strip-integrated projections. We present research into various versions of the iterative CLEAN algorithm for the solution of this problem. ... where is the object brightness distribution, is the fan (dirty) beam, and is the dirty (summary) image. ... We carried out the study of TC-CLEAN applied to image reconstruction with few projections. ...

Methods of Spectral Classification of Stars by Spectrum Photos with Prism. Work with the Computer Program. Determination of Magnetizing Force in Sun Spot by Zeeman's Effect. Investigation of Telescope Optics by Hartmann Method. Investigation of Photoelectric Multiplier. Determination of Stellar Temperature by Method of Spectrophotometric Gradient. ... Investigation of Light Filters Transmission by Photoelectric and Photografic Methods. ... Investigation of Globulae. ...

... astro-ph . ... A recent change in the optical and {\gamma}-ray polarization of the Crab nebula and pulsar . ... A change in the optical polarization angle has been observed by this work, from 109.5 \pm 0.7\deg in 2005 to 85.3 \pm 1.4 \deg in 2012. ... The change in the polarized optical and {\gamma}-ray emission of the Crab nebula/pulsar as observed, for the first time, by GASP and Integral may indicate that reconnection is possibly at work in the Crab nebula. ...