... On a Blue Moon . ... Rising at sunset, the gorgeous Full Moon of August 31 became the second Full Moon in a month. According to modern reckoning, that makes it a Blue Moon. ... Halo of the Cat s Eye . ... The Cat's Eye Nebula (NGC 6543) is one of the best known planetary nebulae in the sky. ... Apollo 11 Landing Site Panorama . ... A Dark Earth with a Red Sprite . ... Colorful Clouds Near Rho Ophiuchi . ... Its close conjunction with the Moon on August 13 was appreciated around planet Earth. ...

This page is devoted to information on Supernova 1999da in NGC 6411 Basic information on this SN, including the last reported brightness, on this Supernova can be found on the main supernova page. Information on the original web pages for many of these images can be found on the Supernova links web page. Supernova 1999da is yet another LOSS discovery. ... M1 Supernova Search has a 1999da page . ... LOSS image . ... Light curves and Spectra: . ... VSNET Light curve (requires JAVA). ...

Program: plscan Purpose: Plots raw IRAS scans Category: IRAS File: plscan.c Author: P.R. Roelfsema Keywords: IRSET= Name of input IR data set [stop] POS= Give a reference position for plot [ none ] If a position is entered here which lies within the coordinates as defined in the header of the input irds, the data are plotted as function of in-scan distance to that position. ... Updates: Dec 7, 1990: PRR, Document created. Dec 11, 1990: PRR, Version 1.0. Dec 17, 1990: PRR, Added LRS anti-droop. ...

... S.P. KOROLEV ROCKET AND SPACE CORPORATION ENERGIA . ... OAO RSC "Energia" . ... Company's History . ... History . Brief History of Rocket and Space Technology . ... Flights Chronology . ... Project History . ISS Russian Segment . Steps of ISS Assembly . Spaceflights Chronology . Chronology of Extravehicular Activity . ISS 45/46 . ... Rocket Space Complexes . ... Launches Chronology . ... Automatic Space Systems . ... HISTORY . ... 2015 JSC "S.P. Korolev RSC "Energia" . ...

. According to observations by NASA's Chandra X-ray Observatory and ground-based optical telescopes, the supernova SN 2006gy is the brightest and most energetic stellar explosion ever recorded and may be a long-sought new type of explosion. Here is an artist's illustration that shows what SN 2006gy may have looked like if viewed at a close distance. NASA/CXC/M.Weiss

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... In 1930, Trumpler noticed that linear diameters (LD) of open clusters increase with distance (D) from the Sun. ... Since that time, the interstellar absorption has become one of the best studied factor in astrophysics, and we may hope that current OCL distance scales are free from this LD-D correlation. To verify if this is the case we have chosen several modern OCL distance scales and test them with the same clusters and the same angular diameters that Trumpler had used back in 1930. ...

... On September 12 and 13, dozens of astronomers plan to meet in Washington, D.C. to discuss the future of the Cornell-owned and operated Arecibo Observatory in Puerto Rico, the largest radio telescope in the world. ... On November 3, 2006, the National Science Foundation (NSF) issued a Senior Review report that advised that the NSF cut Arecibo s funding by 20 to 25 percent in order to free up funding for new observatories and projects. ...

Next: Methods for Structuring and Searching Very Large Catalogs . ... We have explored two automated classification methods: supervised classification using Artificial Neural Networks (ANN) and unsupervised classification using Self Organized Maps (SOM). These methods are used to classify IUE low-dispersion spectra of normal stars with spectral types ranging from O3 to G5. This paper describes the application of automated methods to the problem of the classification of stellar spectra. ...

... Automated Spectral Classification Using Neural Networks E. F. Vieira Laboratorio de AstrofТРsica Espacial y FТРsica Fundamental P.O.Box 50727, 28080 Madrid, Spain, Email: efv@lae#.esa.es J. D. Ponz GSED/ESA, Villafranca P.O.Box 50727, 28080 Madrid, Spain, Email: jdp@vilspa.esa.es Abstract. We have explored two automated classification methods: supervised classification using Artificial Neural Networks (ANN) and unн supervised classification using Self Organized Maps (SOM). ...

... Popper (1959) classified the eclipsing components as B8 V and B9.5 V. According to Wolff and Preston (1978) the primary component (B8) is a HgMn star. Spectroscopic elements were determined by Wyse (1936) from observations made in the years 1934 - 1935 and by Harper (1937) from observations 1935 -1936. ... Rachkovskaya (1985) according to Harper - 2.68 and 2.36 observed the star in the years 1967 -1968 and 1981 - 1982 and obtained the mass ratio q » 1. ...

Subject, Problems and Objects of Theoretical Astrophysics. ... Stellar Photospheres, Their Features. ... Physics of Continuous Radiation Absorption in Stellar Photospheres. ... Continuous Radiation Absorption in Stellar Photospheres of Various Spectral Classes. Solar Type Photospheres. ... Characterisics of Absorption Lines. ... Interstellar Absorption Lines, Their Features. ... Physical and Dynamic Features of Interstellar Medium, Which Follows from Observations of Interstellar Absorption Lines. ...

... Be/X-Ray Binaries and candidates in the Galaxy Up: Be/X-ray binaries and candidates Previous: Introduction . ... We separate galactic sources, systems in Large Magellanic Cloud (LMC) and in the Small Magellanic Cloud (SMC). ... In the first column we give sources names. ... Some comments and more detailed description of each object can be found in subsections "Comments to the tables" below (each subsection refers to galactic, LMC or SMC sources). ... Be/X-Ray Binaries and candidates in the SMC . ...

... Report on Cosmic Call 1999 . ... Cosmic Call Sessions . ... This Report outlines methodology, hard- and software, which were developed to transmit first public Interstellar messages from Evpatoria Deep Space Center (EDSC), and describes four Cosmic Call Sessions, which were fulfilled in EDSC on May 24 and June 30 - July 1, 1999. ... Each Cosmic Call consists of two parts. ... Dutil Message, . ... The software for gathering all messages and creating the Cosmic Call stream, was written on C language. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Moon . ... According to Ron Miller, author of the respected history of spaceship concepts The Dream Machines , the first known appearance of the tale in print was in the 2 October Тљ1909 issue of Scientific American where the hero was named т??Wang Tuт?? ... Naming a crater after Wan Hu т??the legendary Chinese inventorт?? was proposed shortly after the Soviet probe Zond 3 flew past the Moon in July 1965 returning images of the Moon?s western farside. ...

... Code of participant Assess the color of the stars and mark accordingly it with a "X": White UMi And Ari Cyg Tau Answer: Blue Yellow Red 10. ... Specify direction to the points of intersection of the ecliptic and the equator. ... Observations with telescope 12. Point your telescope to the M45. ... Classify the object as one of the following: open cluster (OC), a globular cluster (GC), an emission nebula (EN) and planetary nebula (PN). ... Estimate the distance between the stars in arc minutes. ...

... Posts tagged ?outliers? ... MADS] Mahalanobis distance? Tags: LDA , MADS , Mahalanobis , Mahalanobis distance , multivariate , outliers , PCA . ... Another deduced conclusion from reading preprints listed in arxiv/astro-ph is that astronomers tend to confuse classification and clustering and to mix up methodologies. They tend to think any algorithms from classification or clustering analysis serve their purpose since both analysis algorithms, no matter what, look like a black box . ...

Databases (NSDC) of the Natural Planetary Satellites. ... In the file of explanations, source of data or bibliographic reference is indicated. ... File of data (Data) *.txt. ... Les donnИes standard de la base NSDB (Standard Data) . ... Any bibliographic reference has the following fields (please, don't mix up these reference fields hereafter called "fields" with the search fields where you will enter the data and which are hereafter denoted as "search fields" or "text fields"): . ...

... astro-ph/0303500 . ... В Архиве электронных препринтов появилась интересная и важная обзорная работа с юбилейным номером 0303500. Космический телескоп им. Хаббла . ... Благодаря столь широкому охвату читатель может узнать о множестве открытий последнего десятилетия в астрономии. Существенно и то, что Ливио не просто перечисляет открытия, он много рассказывает о физике явлений. ... Список ссылок занимает 15 страниц. ... Галактики на больших красных смещениях глазами Космического телескопа . ...

WDC-A Digital Exchange Format for One-Minute Geomagnetic Data (Update August 1993) 1. The logical record length is 400 coded characters containing header information, blank spaces, and data for one element for one hour. ... Each logical record contains header information and data in the following format: North polar distance, longitude, year, month, day, hour, element, observatory code, blank spaces, 60 data values, and an hourly mean. ... ORG is the origin of the data. A = Alaska Chain. ...