... Deriving the sine or cosine of an arbitrary angle takes a bit more math than is covered here. ... Note first of all that a right-angled triangle contains two angles. ... Because the side opposite to A is the one adjacent to (90њ- A), it follows that the sine of one angle is the cosine of the other, and vice versa: . ... Consider the triangle PQR (drawing) with all three angles equal to 60њ. ... If we want the angle A to grow in equal steps of 15 o , we still need the sine and cosine of 15њ and 75њ. ...

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. ...

... Posts tagged ?signal processing? ... Posted by hlee . ... Category: Algorithms , arXiv , Cross-Cultural , Data Processing , Fitting , Imaging , Methods , Quotes , Spectral , Stat , Uncertainty | ... ArXiv] 2nd week, Mar. ... Algorithms arXiv Astro Bad AstroStat Bayesian CHASC Cross-Cultural Data Processing Fitting Frequentist Galaxies gamma-ray High-Energy Imaging Jargon Job Languages MC MCMC Meta Methods Misc News Nuggets Objects Optical Physics Quotes Spectral Stars Stat Timing Uncertainty X-ray ....

Astronotes Armagh Planetarium's Stellar Blog! ... Armagh Planetarium . ... Stars . Exoplanets . ... Space Flight . ... Posted on February 3, 2011 | No Comments Kepler-11 is an amazing, newly-discovered system of exoplanets. ... Continue Reading.. ... No Comments Don Pollacco, a research astronomer at Queens University Belfast, came to Armagh Planetarium to give a fascinating talk on exoplanets in January 2011. ... Posted on November 29, 2010 | ... Posted on September 22, 2010 | ...

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General Forum Message . Forums: . ... Post . ... Here Is Another Link To M13 . ... Post Message | ... I have put the image of M13 on my home Web site - along with another image of M13 (not sure where it's from, I think SEDs). http://mysite.verizon.net/respud62/id7.html . ... www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... The Amateur Telescope Makers of Boston, Inc. ATMoB) is an amateur astronomy club devoted to telescope making, observing, and studying the heavens. ... In 1973, the Bond Astronomical Society, another long-standing club, merged with the ATMoB making the club one of the oldest and largest general interest astronomy clubs in the country. ... The Amateur Telescope Makers of Boston, Inc. is an IRS designated 501(c)3 public charity organization. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

... Date: Thu Sep 13 2001 - 12:17:52 EST . Next message: Tony Wong: "invitation to workshop" . Previous message: Tony Wong: "Re: invite" . In reply to: Tony Wong: "suggestions from J. Whiteoak" . Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] . ... This archive was generated by hypermail 2b29 : Thu Sep 13 2001 - 12:17:55 EST ...

Appendix B: Annotated Bibliography There are a wide variety of texts available for those who are interested in learning more about assembly language or other topics this text covers. ... Microprocessor Programming for Computer Hobbyists Neill Graham TAB books ISBN 0-8306-6952-3 1977 This book provides a gentle introduction to data structures for computer hobbyists. ... IBM Assembler Language and Programming Peter Able Prentice-Hall ISBN 0-13-448143-7 1987 A college text book on assembly language. ...

... redirect an entire server or directory to a single URL . ... stop/restrict robots . proxy SSL requests through your non-SSL server . There are two chief ways to redirect all requests for an entire server to a single location: one which requires the use of mod_rewrite , and another which uses a CGI script. First: if all you need to do is migrate a server from one name to another, simply use the Redirect directive, as supplied by mod_alias : Redirect / http://www.apache.org/ . ...

... Another piece of asteroid discovery news, from Terry Moseley: "Dave Grennan from Dublin has just discovered a Main Belt asteroid from his observatory in Raheny. ... Dave's discovery comes just after Dave McDonald's find of 2008 TM9 a few weeks ago. ... This is only the third asteroid ever discovered in Ireland. ... This has been an amazing year for astronomy in Ireland, and is a superb lead-in to IYA 2009!" ... International Year of Astronomy, Ireland National Node . ...

... Another Nearby Supernova in the Whirlpool Galaxy . ... Credit Copyright: Stephane Lamotte Bailey, Marc Deldem , Jean-Luc Dauvergne Explanation: One of the brightest supernovas in recent years has just been recorded in the nearby Whirlpool galaxy (M51). ... Pictured above are two images of M51 taken with a small telescope: one taken on May 30 that does not show the supernova, and one taken on June 2 which does. The June 2 image is one of the first images reported to contain the supernova. ...

... Bad Astronomy . Misconceptions . ... The Nine Planets . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... What Color is Mars? ... Hoagland's Credentials . ... A discussion of Mars colors is ongoing on the Bad Astronomy Bulletin Board . ... Hoagland's loathsome Enterprise Mission website . An interesting web page which purports to show how images on Hoagland's website were manipulated. ... Hoagland's page on the "glass worm" . ... 2008 Phil Plait. ...

. Album : asv-album :: Travels to distant places and countries :: 2004/06 Leiden, Hague, Amsterdam (Netherlands) :: 01/06/04 Moscow-Leiden. Flight, trip to Leiden, first walk . Up . << Prev . Another example of near-house decorations . Next >> . Album created by photo album generator from MarginalHacks by David Ljung on Tue Jun 23 14:47:53 2015 .

Blog: Alter World . ... 101) Байки из Фидо (7) Литература (16) Листая страницы прошлого Выберите месяц Апрель 2016 (2) Март 2016 (4) Февраль 2016 (4) Январь 2016 (5) Декабрь 2015 (4) Ноябрь 2015 (3) Октябрь 2015 (5) Сентябрь 2015 (5) Август 2015 (5) Июль 2015 (5) Июнь 2015 (4) Май 2015 (8) Апрель 2015 (5) Март 2015 (4) Февраль 2015 (4) Январь 2015 (7) Декабрь 2014 (7) Ноябрь 2014 (4) Октябрь 2014 (5) Сентябрь 2014 (8) Август 2014 (8) Июль 2014 (6) Июнь 2014 (7) Май 2014 (11) Апрель 2014 ...

... Oral traditions have since time immemorial satisfied generations of children and adults with stories of wonder, fantasy, truth, and mystery. ... The story of astronomy and astronomy's evolution as a science includes countless tales originally crafted to explain the visible celestial bodies, their motions (regular and irregular), the mysteries behind their existence, and the powers they exert over us on Earth. ... Impediments to Elementary Astronomy Programs . ... Storytelling Activities - Moon Story...

... Department Number . ... Astro Space Center . ... Telephone Number . 7(095) 333 2333 . FAX Number . 7(095) 333 2378 . ... alber@asc.rssi.ru . ...

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... Tonight's Sky . ... Search By Name Enter coordinates Use current location . ... Searching.. ... Sky this Month . ... Bob Berman . ... Searching for Far Out and Wandering Worlds . ... Supernova showered Earth with radioactive debris . ... Early Mars bombardment likely enhanced life-supporting habitat . ... Dave's Universe . ... Bob Berman's Strange Universe . Bob Bermanт??s Strange Universe: Another Earth: Where is the search leading? ... Get instant access to subscriber content on Astronomy.com! ...

... Яркая блузка прямого силуэта. ... Цвет: красный, белый, желтый Рост девушки-фотомодели 173 см. ... По материалу: Шифон . ... Материал: 90% полиэстер 10% эластан . Блузки . ... Цвет: белый . Коллекция: Весна-лето 2016 . Материал верха: полимер . Высота каблука: 8 . ... Высота голенища: 10 . Материал подошвы: резина . ... Кеды на танкетке Bella Comoda. ... Материал: полимер. Сезон: Весна-лето 2016. ... Цвет: бордовый . ... Материал подошвы: искусственный материал . ...