Two major reasons: the number of stars isn't really seven (it's many more), and they all have different brightnesses, so that you see more or fewer of them depending on viewing conditions. The brightness of stars is measured on the magnitude scale, where the most prominent stars in the sky are around 1st magnitude, and the faintest you can see with your eye are about 6th. ... I think this makes it quite likely that the list will be truncated at Taygeta, giving six visible stars. ...

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• The Pleiades
• Planetary Radar: Arecibo Radar Images of Planets
• Mythology of the Seven Sisters (Pleiads)

... 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. ...

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• A unique isolated dwarf spheroidal galaxy KKR25
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• Detection of Radio Transients and Variable Radio Sources Using the Archive Data

... Club By-laws . ... Other Club Activities . ... Public Nights . ... Dr. James Green, NASA, Director Planetary Science will be our esteemed speaker on Tuesday, April 12, 2016 at 7:30 PM in Peyton Hall on the Princeton University campus. ... Our astronomers setup telescopes for public use at Communiversity in Princeton, Super Science Saturday at the NJ State Museum in Trenton and at various public events around Mercer County. ... Amateur Astronomers Association of Princeton, Inc., ...

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. Please standby and you will be automatically connected to the new location of the unframed Supernova page. Or, click on the link above. If you have questions or problems, please email me at David Bishop dbishop@vhdl.org . Last modified: Mon Aug 27 12:40:15 EDT 2001

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• Supernova 2006E in NGC 5338
• Bright Supernova - Archives
• Nova in M31 2000 3

... It is found that the correlation coefficients between these two parameters calculated separately inside and outside the sunspot formation zone ±30 have cyclic variation and occur in anti-phase. This suggests different mechanisms of formation of the corona in the fields of small, medium, and large scales. ... The relationship between the coronal green line brightness (CGLB) and the magnetic field strength (MFS) has been investigated by constructing the corresponding synoptic maps for the 1977-2001. ...

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• http://www.izmiran.rssi.ru/~ichertok/CHAINS/ANNOUNC/desc.htm
• Chains and CMEs
• Distribution of the analyzed SEPs with different >100 MeV proton fluxes (J100)

... Bad Astronomy . ... Bad Astronomy: The North Star, Polaris, is a very bright star. Good Astronomy: Polaris is a middling-bright star, easily missed. ... He said it was close to Polaris, the North Star, but he also said it was in the East. ... It's natural, I suppose, to think that such an important star should be bright, but really, that's a conceit, like thinking that the Earth is at the center of the Universe. If more people knew just why Polaris is the North Star, this Bad Idea would stop. ...

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• Phil Plait's Bad Astronomy: Mad Science
• Phil Plait's Bad Astronomy: Bitesize Astronomy
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... At the ESO Web you'll find a range of different file formats - from HTML to PostScript/PDF and MPEG movies. See below for a list of helper applications or viewers to display those formats on your MS Windows, Macintosh or Unix computer. ... You can use Ghostscript and ghostview/GSview to view PostScript files (available for MS Windows, Macintosh and Unix platforms). ... MPEG is a way to code audio-visual information a digital format. For Unix platforms, you can use UC Berkeley's mpeg_play . ...

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• Adding plot classes
• Template Spectra
• The Brightness of the Night Sky

Next: The Scenario Machine: Operational Up: Evolution of Magnetic Rotators Previous: Ejector-propeller hysteresis . ... The length of this segment is determined by the eccentricity. ... In this case no hysteresis occurs and transitions E -- P and the reverse take place in symmetrical points of the orbit. ... Here EP means a mixed state of the rotator at which it is in the ejector state during one part of the orbit, and in the propeller state during the rest of the orbital cycle. ...

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• Nomenclature

... Flux density at 1 GHz (/Jy): 49 . ... Notes: Possibly the remnant of the SN of AD 185? ... Optical: Bright, radiative filaments, with some faint Balmer dominated filaments. ... Distance: Possible association with OB stars suggests 2.5 kpc. ... 1973, ApJS, 26, 19. ... Einstein observations ADS . ... Balmer dominated optical filaments. ... Historical association ADS . ... Observations of Balmer dominated filaments. ... ASCA spectroscopy. ... ASCA observations of N and SW. ... 2001, ApJ, 547, 995. ...

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• G189.1+3.0
• G34.7-0.4
• G260.4-3.4

National Aeronautics and Space Administration . ... JOHN E. BLAHA (COLONEL, USAF, RET.) NASA ASTRONAUT (FORMER) . ... EDUCATION: Graduated from Granby High School in Norfolk, Virginia, in 1960; received a bachelor of science in engineering science from the United States Air Force Academy in 1965 and a master of science in astronautical engineering from Purdue University in 1966. ... NASA EXPERIENCE: Selected as an astronaut in May 1980, Blaha has logged 161 days in space on 5 space missions. ...

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• Astronaut Bio: J. M. Linenger 8/01
• Astronaut Bio: Story Musgrave 8/97
• Astronaut Bio: Eileen Collins (5/2006)

REPORT ON PIERRE DELIGNE FELLOWSHIP, 2010 SERGEY OBLEZIN During 2010 I have been working on developing a representation theory approach to mirror symmetry and quantum cohomology of homogeneous spaces, associated to Lie groups of classical type. According to Givental the glN -Whittaker functions, being solutions to the quantum cohomology D-module QH (FlN ) of the complete flag variety FlN = GLN (C)/B , describe the corresponding equivariant Gromov-Witten invariants of FlN . ... J. (2010). ...

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• http://www.mccme.ru/dfc/2009/reports/2011-Oblezin.pdf
• Franco-Russian workshop on Algorithms, complexity and applications
• Periods associated to motives (Spring 2014)

... Dept. for Astrometry & Space Geodynamics . ... Dept. for Physics of Stars&Galaxies . ... Dept. for Physics of Planetary Systems . ... Science . ... All Pages . ... Research of the stars with planets which pass apparent star disk (transiting exoplanets). The transit method based on a detection star brightness decrease during a passing of planet in front of its disk. Observed brightness system decries when planet pass star disk and its volume depend of the relative sizes star and planet. ...

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• Achievements - Page 3
• Internet telescope
• Optical systems and devices

The European Southern Observatory's Very Large Telescope has captured a detailed view of a star-forming region in the Large Magellanic Cloud тАФ one of the Milky Way's satellite galaxies. ... NGC 2014 (right) is irregularly shaped and red and its neighbour, NGC 2020, is round and blue. These odd and very different forms were both sculpted by powerful stellar winds from extremely hot newborn stars that also radiate into the gas, causing it to glow brightly. ...

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• The different types of supernovae | Astronomy.com
• Bright planets meet at dusk | Astronomy.com
• A surprisingly bright superbubble | Astronomy.com

. ATMOSPHERIC INFLUENCE ON THE DIFFERENT RADIO-ENGINEERING . SYSTEM FUNCTIONING . The calculations of the atmospheric impact on terrestrial and satellite communication links with frequencies above 10 GHz using the ITU-R data bank. The correction of the Earth cover optical images obtained from the satellite/ . The Earth atmospheric influence on the radiowave propagation parameters in wide frequency range (from SLF to UV). Contact e-mail: . Pozhidayev Victor, Ph.D - vic@cplire.ru . © IRE RAS 1996-20 11

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• Chaos-based Associative Retrieval - NDCS-01
• Getting Started in Actor Prolog. 3D Web Site.

Images and text 2003 Paul Valleli . While up at Stellafane for pre-convention preparations, I spent some early morning times, experimenting with different videography setups on the 13" F/10 Schupmann at the McGregor Observatory. ... Mars was too bright and would have required neutral density filters. ... Next time, I will try 12mm and 9mm projections. ... I aquired about ten thousand frames by 3AM, at which time a breeze picked up and the seeing went to Hellas! ... 2003 Paul Valleli . ...

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• Amateur Telescope Makers of Boston

... Contacts: Evgeny A. Loupian, Dr. Sci., e-mail: evgeny@smis.iki.rssi.ru Sergey A. Bartalev, Dr. Sci., e-mail: bartalev@smis.iki.rssi.ru Web interface for burnt area mapping using Landsat data Stellar Tracker In 2013 IKI RAN together with the NPK "Electrooptics" completed the phase of the five-year research on studying the ways to build a stellar inertial navigation system (SINS) for aviation applications. ... Fig. 1 shows the SINS layout created on the basis of the astronomical camera. ... Fig.1. ...

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• Polar Orbiting Satellites
• The Acceleration of the Aurora
• Close-up of the Aurora

... The ancient chronical said about the colour rings around the Sun and the Moon, about three suns in the sky, light columns, bright lightning, different "comets" rushing to the Earth, moving among the stars or round the Earth with the sky. All these occurrences may be divided into three categories: one that occur in the near or far space, processes going on in the Earth atmosphere under the influence of cosmic factors and at last the occurrences connected with the Earth atmosphere. ... Rainbow . ...

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• sunstroene

Launch Vehicle Energia . ... Among problems solved while developing the Energia-Buran Reusable Space System were: . ... of the Energia-Buran Space System . to the launch site for the first launch. LV Energia at the launch site working out of LV design to serve as a basis for the development of other launch vehicles differing not only in their liftoff capabilities, but also in types of payloads including reusable orbiters; . ... SEA LAUNCH . ... Official WEB-site of S.P.Korolev RSC Energia . ...

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• The Company's History
• RSC "Energia" - History

... Solar Data: f.e. X-ray . Night Sky Live . ... Heavens-Above: Sky chart, Satellites, Iridiums and astronomical objects For Moscow For SAO Baksan . ... ESO-MIDAS page . ... Tutorials for Astronomy . ... Asteroid and Comet Hazard . ... Observable Comets: This page lists links to orbital elements and ephemerides of (potentially) observable comets. ... Leonid page - a lot of information for years Comets and Meteor Showers . The American Meteor Society . ... North American Meteor Network Home Page . ...

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LIPSKIY-RODIONOVA' LUNAR ANTIPODES AS PRECURSORS OF A REGULAR WAVE PLANETOLOGY G.G.Kochemasov IGEM of the Russian Academy of Sciences, Moscow, Russia kochem@igem.ru / Fax: (009)(095)230 21 79 The first observations of the lunar far side allowed to compare it with the near side and draw very important conclusions in the very beginning of planetary studies based on spacecrafts. ... Celestial bodies are dichotomic. ... The concept of celestial bodies includes Sun (a star) as one of them. ...

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• http://selena.sai.msu.ru/Symposium/lipskiy.pdf
• http://selena.sai.msu.ru/Shev/Publications/ms38/ms083.pdf
• http://selena.sai.msu.ru/Bus/Publications/m44_14_busarev_etal.pdf