... The Round Earth . 8a. The Horizon . ... 9a. Earth orbits Sun? . ... What is the distance D to the horizon? ... Your line of sight to the horizon is a tangent to the Earth--a line which touches the sphere of the Earth at just one point, marked B in the drawing here. ... From the top of Mauna Kea on Hawaii, an extinct volcano about 4 km high (also the site of important astronomical observatories), the horizon should be about twice as distant, 226 km. ... One more: Distance to the horizon on Mars . ...

Last modified on January 12, 1998 by A. Richichi . ... At the TIRGO observatory, we set out to measure the event although last minute revised predictions by Dunham were now pessimistic about the actual chance of observation. ... We used the NICMOS3-based infrared camera ARNICA , in conjunction with a special data acquisition software developed by Carlo Baffa for lunar occultation observations, which allows continuous fast integration on a small area of the infrared array. ...

Hipparchus (and possibly Aristarchus before him) also derived the Moon's distance from the duration of a lunar eclipse . Because the Earth casts a much larger shadow than the Moon, such an eclipse usually darkens the entire Moon, for several hours. ... If the Sun is assumed to be very distant, and if the Moon crosses the middle of the shadow (if not, corrections must be made), the width of the shadow is expected to be about 2r , twice the Earth's radius r . ... Last updated 4 February 1999 Moon. ...

... More than two dozens of integrated and specialized simulators and trainers are used presently at the Gagarin Cosmonaut Center for training cosmonauts within the framework of "Soyuz-TM" utilization program and International Space Station. ... All the cosmonauts, which have flown on board the "Soyuz" space vehicles - both Russian and foreign ones, including the first space tourist Dennis Tito - have passed the full training course just in these very simulators. ... Copyright 2000-2016 ATLAS Aerospace ...

... We have compiled the Catalogue of extragalactic supernovae using the GCVS card catalogue. ... Doubtful (?), or rejected (-) SN 8 A1 --- RemFlag [*] The '*' indicates a remark in sn_rem.dat 10- 19 A10 --- Gal Parent galaxy designation 21- 22 I2 h RAh Right Ascension 1950 of Parent galaxy 23- 24 I2 min RAm Right Ascension 1950 (minutes) 25- 28 F4.1 s RAs Right Ascension 1950 (seconds) 29 A1 --- DE- Declination 1950 (sign) 30- 31 I2 deg DEd Declination 1950 of Parent ...

... Ciel Espace, le magazine qui vous guide toujours plus loin . ... des actualitГїs . ... des interviews, des portraits . les plus belles images de l'Univers dГїcryptГїes pour vous . ... des pages consacrГїes Г la publication de vos photos Mais c'est aussi une vraie communautГї avec laquelle partager votre passion et nourrir votre curiositГї. Accueil Г? la une A quelle distance sont les Гїtoiles ? ... A quelle distance sont les Гїtoiles ? ... 23/05/2014 - Les cratГЕres de Mars sont-ils Г vendre ? ...

... Flight 1) 2) 3) Flight 1) 2) 3) model FM1 has the following parts: LNA MY-18, serial number PN 01-0252, factory number FM1; receiver box KRT-18, serial number PN 17660-01, factory number FM-001; DC-DC converters IVEP1 and IVEP2, factory number 05. model FM2 has the following parts: LNA MY-18, serial number PN 01-0252, factory number FM2; Receiver box KRT-18 serial number PN 17660-01, factory number FM-002; DC-DC converters IVEP1 and IVEP2 factory number 06. ... See Appendix 1. ... 2003. ... 2004 . ...

The AstroGuide . ... AstroGuide | ... AstroGuide Listing . Login . See many more Astronomy Listings by: Category or Alphabet . ... Last Update July 27, 2006 . Listed Since July 15, 1998 . ... Web Site . http://janus.astro.umd.edu/astro/distance/ . ... Web . www.astronomy.net . ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . are trademarks of John Huggins ...

... Scripnichenko V. I., Vinogradova T. A., Zheleznov N. B. AMPLE - integrated multi-purpose software package for minor planets. Version 1.3. Ключевые слова: малые планеты, эфемериды, астрометрия, элементы орбит, О-С, идентификация, пластинка, трек, орбита, обсерватория, объектно-ориентированные технологии. ... Начиная с версии 1.3, в AMPLE предоставляется новая возможность - вычисление эфемерид и вычисление (О-С) для объектов, которые отсутствуют в базе данных пакета. ...

... Работа над жидкотопливным ракетным двигателем нового поколения, начатая NASA, ВВС США и двумя контрактными производителями - Rocketdyne и Aerojet, возобновилась после ураганов Катрина и Рита. Двигатель Integrated Powerhead Demostrator (IPD) однажды запускали для тестирования в Космическом центре NASA Стеннис возле залива Сен-Луис в штате Миссиссиппи. ... В современных двигателях шаттлов жидкое водородное топливо и жидкий кислородный окислитель подаются в камеру сгорания вместе и воспламеняются. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Space Flight . ... Mixing the theme of space and Christmas we have had Santa giving present to aliens, Christmas trees blasting off into space, reindeers landing on the Moon and even Santa getting a brand new rocket sleigh! ... Foundation Level Winner: Benjamin Ritchie тАУ Portaferry Integrated Primary School . ... Enniskillen Integrated Primary School, Drumcoo . ... Omagh Integrated Primary School . ... Portaferry Integrated Primary School . ...

... About ATMoB . ... The ATMoB has established an email list server with various mailing lists for use by our members. ... This list has been established for use by ATMoB members, friends of members, and anyone interested in astronomy with a focus on things of interest to those in the greater Boston area. ... Notice: The owners of this server, the Amateur Telescope Makers of Boston, and any other sentient beings that happen to be involved assume no responsibility for any messages posted via this system...

A High School Curriculum in Astrobiology . Astrobiology is a truly integrated science. For example, when extreme environments of Earth are examined as a springboard to the search for life in the Solar System, other subjects?the biology of microorganisms, the chemistry of nutrients, the process of respiration, and the nature of autotrophic habitats?are intimately entwined and must be considered in one breath, albeit a long one. ...

... Incremental cost is therefore limited to a simple 16-bit up down hardware counter interface buffer for the interpolator and 9 bits of a 16 bit port for the absolute encoder. Teledyne-Gurley Model 8626, 2 required @ $1400 $2800 Complete Duplicate Spares $2800 . BEI Model M25, 2 required @ $1000 $2000 Complete Duplicate Spares $2000 . ... Datacube VG-120 Multibus video interface $3000 Spare $3000 Panasonic B/W CCD camera, 2 req'd @ $1000 $2000 One spare camera $1000 . ...

... Galaxies 99 Cosmic background with model of cloudy interstellar medium Yu. ... Figure 1: Averaged spectrum of the cosmic background I f in frequency range 0.25 200 MHz for the Galactic poles. ... First interpretation of the cosmic noise background spectrum at broad band frequency range 0.25 200 MHz with a model of the cloudy interstellar medium ISM is presented here. ... Synthesized background spectra I f for regions of the Galactic poles at the frequency range 0.25 200 MHz is presented in Fig. ...

THE PARAMETERS INVOLVED IN HAPKE'S MODEL FOR ESTIMATION OF THE COMPOSITION OF THE EJECTA LUNAR TERRAINS. ... In the previous papers we were estimated the surface roughness of the ejecta lunar terrains by means comparison of the local phase function and the average integrated lunar indicatrix. ... The Hapke's theoretical model of the lunar surface reflection. ... For THE PARAMETERS INVOLVED IN HAPKE'S MODEL: S.G. Pugacheva, V.V. Shevchenko a low-albedo lunar surface parameter Bo = 1. ...

... Bad Astronomy . Misconceptions . ... Bitesize Astronomy . ... The Nine Planets . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... As I say on the page about orbits , at a year away Planet X must be roughly as far as Saturn (and therefore closer as you read this page). The distance from Earth in May 2002 should be about 900 million kilometers. ... Planet X, if it orbits on an ellipse, can get as far as 235 AU away, 7 times the distance of Pluto. ... 2008 Phil Plait. ...

... Iowa Robotic Telescope | ... Talon is based on OCAAS, a software suite developed by software engineer Elwood Downey ( Clear Sky Institute ) for use at the University of Iowa ?s first remote facility (the ATF, or Automated Telescope Facility). ... XObservatory : Telescope Control Interface . ... This program calls upon and coordinates much of the interrelated portions of the Talon architecture, and forms the primary control panel for the telescope, dome, and peripheral systems when used locally. ...

Authors: V.A. Marsakov , Yu.G. Shevelev , . ... Systematic effects of random errors in distances and reddening, metallicity and luminosity indices of F stars from catalogues with photometry are investigated. ... Исследуется систематические эффекты случайных ошибок в определениях расстояний, покраснений, индексов металличности в светимости F -звезд из каталогов с -фотометрией. ...

Rastorguev А.S. "Astronomical Distances" (Lecture course for postgraduates, 2009-2016) . Part 1. ... Trigonometric parallaxes of stars. Moving clusters distances. ... Photometric distances: general approach. Normal stars as "standard candles". ... Main Sequence fitting or distance scale of star clusters. ... Moving photospheres technique. Cepheid distance scale and P-L relations. RR Lyrae distance scale. ... Globular clusters luminosity function. ...