41. Lunar Eclipses This image explains how the Earth s shadow causes a lunar eclipse. Notice the difference between the umbra and the penumbra. http://www.windows.ucar.edu/tour/link=/moon/eclipse.html

A note to our users: The site will be temporarily down for server maintenance on April 5, from 6am to 6pm MDT ( 12:00 - 24:00 UTC ) Use the Time Zone Converter to find out when this will happen in your time zone. Lunar Eclipses This image explains how the Earth's shadow causes a lunar eclipse. Notice the difference between the umbra and the penumbra. Click on image for full size ( 17K JPG Windows Original Lunar eclipses are special events that only occur when certain conditions are met. First of all, the Moon must be in full phase . Secondly, the Sun Earth and Moon must be in a perfectly straight line. If both of these are met, then the Earth's shadow can block the Sun's light from hitting the Moon. There are three types of lunar eclipses. Which one we will see depends on the alignment of the three celestial objects. But first, you need to know that the Earth's shadow is broken up into two parts. The umbra is the darker part of the shadow, where no part of the Sun can been seen. The penumbra is lighter than the umbra, because part of the Sun can be seen. So, when part of the Moon passes through the umbra, this is called a partial eclipse. When all of the Moon passes through the umbra, this is called a total eclipse. Finally, when the Moon only passes through the penumbra, this is called a penumbral eclipse.

42. Eclipses Solar eclipses A solar eclipse occurs when the Moon passes directly in front of the Sun, blocking out its view over a small region on the Earth. http://www.astro.cornell.edu/academics/courses/astro201/eclipse.htm

Click here to find Fred Espenak's eclipse page at the NASA Goddard Space Flight Center. Solar Eclipses: A solar eclipse occurs when the Moon passes directly in front of the Sun , blocking out its view over a small region on the Earth. Remember that the angular diameters of the Sun and the Moon as viewed from Earth are almost identical. Lunar Eclipses: A lunar eclipse occurs when the Moon moves through the Earth's shadow, thereby blocking sunlight from falling on the Moon. In order for there to be a total eclipse, the Moon must go through the umbra of the Earth's shadow. If the Moon partly goes through the umbra, there will be a partial eclipse. If the Moon only goes through the penumbra, then the Moon's light is only slightly dimmed, and the eclipse is hardly noticeable here on Earth. The Moon's orbit is tipped by 5 degrees with respect to the Earth's orbit. Therefore, eclipses do not occur every month. Instead, there are two eclipse seasons every year, about 6 months apart. Eclipses can occur only then the Sun, Moon and Earth line up perfectly, that is, when the line of interesection of the Earth's orbit plane and the Moon's points directly at the Sun. This is called the line of nodes. Movement of the line of nodes causes the eclipse seasons to vary from one year to the next.

43. On The Nature Of Eclipses They also cast shadows, and when, in the course of their orbits, the Moon s shadow falls on the Earth, or vice versa, it is known as an eclipse. http://www.inconstantmoon.com/cyc_ecl1.htm

on the nature of eclipses The Sun is the only body in the solar system which shines with its own light. All of the others, including the Earth and Moon, reflect the Sun's light. They also cast shadows, and when, in the course of their orbits, the Moon's shadow falls on the Earth, or vice versa, it is known as an eclipse. There are two parts to these shadows. The umbra is a central cone of darkness which tapers away from the Earth or Moon, whilst the penumbra is an outer cone of partial shadow which diverges instead of tapering. solar eclipse The Moon's shadow cast on the Earth appears as a solar eclipse. An observer inside the circle of the penumbra will see a partial solar eclipse: the Moon shows as a bite taken out of the Sun's disc. Within the smaller, inner circle of the umbra the Sun will be entirely blotted out by the Moon. Anyone outside the the area covered by the penumbra (and therefore also the umbra) will see no eclipse at all. The shadow travels across the surface of the Earth, generally along a curved track. The zone covered by the umbra is called the path of totality, and although no more than 270km (170 miles) wide (when the Moon is directly overhead) it may be thousands of kilometers long. There is a system of terms and notations for the key stages of a solar eclipse: First Contact (P1) - The observer enters the penumbra, the start of the partial eclipse.

44. Total Solar Eclipses - Images, Impressions, Experiences In Its Trajectory . . . Interact, exchange, experience, share ideas, learn, work together with others on the occasion of eclipse Images, impressions and design a solar viewer. http://www.colorsofindia.com/eclipse/

to ta l s ol ar ec li ps e Welcome to a virtual experience of the first total solar eclipse of the millennium. And enjoy this wonderful opportunity with friends and family. We invite you to interact, exchange, share ideas, learn online and work together with others worldwide through this Web environment. We expect this event to be an occassion to share eclipse-related information and experiences between each other's countries and cultures. The images and impressions of the eclipse in its trajectory is recorded online on 21st June 2001, the day of the total solar eclipse. Total Solar Eclipse 2006 (coming up) Transit of Venus 2004 Total Solar Eclipse 2001 Total Solar Eclipse '99 Cosmic Hide and Seek ... Click for details Send your comments and suggestions to: Project Solar Eclipse Solar Web Main Exchange Paste Board Gallery Web talk Message board ... Membership Other Collaborative Events Colorsofindia Indian Elephant Sundial Sailboat ... Dream Submit your website far and near over the whole World Wide Web

45. NASA - Five Millennium Catalog Of Solar Eclipses This is part of NASA s official eclipse home page. It contains links to a catalog of 6000 years of solar eclipses. http://eclipse.gsfc.nasa.gov/SEcat5/catalog.html

NASA (National Aeronautics and Space Administration) Home Solar Eclipses Lunar Eclipses ... Eclipse Home Page by Fred Espenak, GSFC Planetary Systems Laboratory Five Millennium Catalog of Solar Eclipses -1999 to +3000 (2000 BCE to 3000 CE) Introduction Eclipses of the Sun can only occur during the New Moon phase. It is then possible for the Moon's penumbral, umbral or antumbral shadows to sweep across Earth's surface thereby producing an eclipse. There are four types of solar eclipses: Partial - Moon's penumbral shadow traverses Earth (umbral and antumbral shadows completely miss Earth) Annular - Moon's antumbral shadow traverses Earth (Moon is too far from Earth to completely cover the Sun) Total - Moon's umbral shadow traverses Earth (Moon is close enough to Earth to completely cover the Sun) Hybrid - Moon's umbral and antumbral shadows traverse Earth (eclipse appears annular and total along different sections of its path). Hybrid eclipses are also known as annular-total eclipses. See Five Millennium Catalog of Hybrid Solar Eclipses Central (two limits) Central (one limit) Non-Central (one limit) Solar Eclipses: -1999 to +3000 (2000 BCE to 3000 CE) During the five Millennium period -1999 to +3000 (2000 BCE to 3000 CE[ ]), Earth will experience 11898 solar eclipses. The following table shows the number of eclipses of each type over this period.

46. The Solar System — Infoplease.com eclipses of the Sun and Moon, 2008 Visibility of Planets in Morning and Evening Twilight, 2006 Visibility of Planets in Morning and Evening Twilight, http://www.infoplease.com/ipa/A0873819.html

Site Map FAQ in All Infoplease Almanacs Biographies Dictionary Encyclopedia Spelling Checker Daily Almanac for Apr 3, 2008 Search White Pages Skip Navigation Home Almanacs ... Word of the Day Editor's Favorites National Poetry Month Women's History Month Kosovo Country Profile School Shootings Timeline ... 2008 Calendar Search: Infoplease Info search tips Search: Biographies Bio search tips Health and Science Astronomy The Solar System Formation of the Solar System The Sun The Moon The Moon's Phases ... Visibility of Planets in Morning and Evening Twilight, 2008 See also: Sun, Moon, Stars The Universe Astronomy Astronomical Measurement ... Add to Reddit More on Solar System from Infoplease: The Solar System - An image of the solar system Pluto Demoted! - Not a planet anymore Transit of Venus: June 8, 2004 - A Twice-in-a-Lifetime Event New Dwarf Planet Named Eris Formation of the Solar System - Formation of the Solar System Our solar system consists of one star (the Sun), eight planets and ... Infoplease Tools Calculator Spelling Checker Place Finder Distance Calculator ... Year by Year Career Center Job Search Post Your Resume Continuing Ed.

47. Huge VAT Fraud Tab Eclipses EU's Age-old Scams | Channel Register Huge VAT fraud tab eclipses EU s ageold scams. By Joe Fay More by this author. 20 Feb 2008 0602. Something must be done, MEPs thunder http://www.channelregister.co.uk/2008/02/20/eu_vat_fraud/

var RegId = 75127; Skip to content SetPromptText('q', 'Search'); Distribution Hardware Servers/Storage PC Builder ... Software Top Stories Upgrade outage hits Protx merchants (again) EDS buys Brit security shop Mac is the first to fall in Pwn2Own hack contest Trend, Sophos and McAfee flunk Vista SP1 anti-virus tests ... Apple forbids Windows users from installing Safari for Windows Huge VAT fraud tab eclipses EU's age-old scams By Joe Fay More by this author 20 Feb 2008 06:02 'Something must be done,' MEPs thunder Carousel and VAT fraud is far outstripping Europeans' traditional financial fiddles on EU funds, prompting MEPs to call on the European Commission to overhaul its anti-fraud operation to combat the problem. MEPs said they consider that improved cooperation between the services concerned and with the commission (OLAF) is essential. Easy solution Easy answer - replace VAT with GST VAT = fraud VAT = fraud ... Er, maybe you should pay it before you can claim it back Track this type of story as a custom Atom/RSS feed or by email. Related stories EC tries to get on top of carousel fraud (17 March 2008) (4 February 2008) (29 November 2007) VAT fraudsters 'laughing all the way to their offshore tax haven' (13 August 2007) Carousel fraud jumps to record high (30 July 2007) VAT 'reverse charge' scheme kicks off (1 June 2007) Previous Article Next Article Top 20 stories The week's headlines Whitepapers Getting The Package Right Creating Cost and Energy Efficiency Through Outsourcing Hosting Solutions Enterprise of the future Online Social Networking: The Employer's Dilemma Breaking Hardware News

48. Teachers' Domain: Solar Eclipses Every now and then, the Sun, Earth, and Moon align so that, when viewed from the Earth, the Moon eclipses the Sun s light. Solar eclipses are fairly common http://www.teachersdomain.org/resources/ess05/sci/ess/eiu/eclipse/index.html

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49. Eclipses An image of the eclipse taken at 2324 on 1996 April 3 by Nick James using a 0.30m, f/5.25 Newtonian and a 5s exposure on Gold 200 film. http://www.theastronomer.org/eclipse.html

Last Updated: 2007 Apr 03 20:46 UTC Source file: eclipse.txt Contents TA details Homepage Latest updates Contents/index Our history ... Meeting reports Members' services E-circular archive On-line charts Sales Chart catalogue Special publications Back issues Videos ... Advertising rates Observations Aurora/NLC Comets Deep sky Eclipses/Transits ... Novae/Variables Links Vizie-R JPL Horizons IAU Central Bureau Heavens Above ... Further links Solar eclipses 1995 October 24 Total . Observations by Martin Mobberley from India. 1997 March 8/9 Total . Observations by Hazel McGee from Mongolia. 1998 February 26 Total . Observations by Nick James from Venezuela. 1998 August 22 Annular eclipse . Observations by Mike Harlow from Indonesia. 1999 August 11 Total . BAA observation archive. 2001 June 21 Total Orwell AS report of the 2001 December 14 annular solar eclipse 2003 May 31 Annular 2005 October 3 Annular Lunar eclipses 1996 April 3/4 Total . An image of the eclipse taken at 2324 on 1996 April 3 by Nick James using a 0.30m, f/5.25 Newtonian and a 5s exposure on Gold 200 film. 1996 September 27 Total . This image was taken at 0223UT by Pedro Re , Portugal. He used a C14 at f/6 and Fujichrome Sensia 100 film exposed for 10s. The 7th magnitude star near to the limb is SAO 109078.

50. Astronomy Without A Telescope Let s explore a little more about lunar and solar eclipses. Below is a sequence of images from the August 28, 2007 lunar eclipse taken with a digital http://www.astronomynotes.com/nakedeye/s14.htm

Eclipse Details: Lunar Eclipse Chapter index in this window Chapter index in separate window This material (including images) is . See my for fair use practices. Let's explore a little more about lunar and solar eclipses. Remember that an eclipse happens when an object passes through another object's shadow. Any shadow consists of two parts: an umbra which is the region of total shadow and the penumbra which is the outer region of partial shadow. If the Moon were to pass through the Earth's umbra, an observer on the Moon would not be able to see the Sun at all-she would observe a solar eclipse! An observer on the Earth looking at the Moon would see a total lunar eclipse. The Earth's shadow is pretty big compared to the Moon so a total lunar eclipse lasts about 1 hour 45 minutes. If the Moon only passed through the outer part of the shadow (the penumbra), then the observer on the Moon would see the Sun only partially covered up-a partial solar eclipse. The observer on the Earth would see the Moon only partially dimmed-a partial lunar eclipse. Select the image to get information about this image taken by Gordon Garradd (will display in another window).

51. Iran Leader's Iraq Visit Eclipses US, Arab Ties | Reuters Iran leader s Iraq visit eclipses US, Arab ties. Sun Mar 2, 2008 708am EST. Email Print . Share. Reprints Single Page. Text + http://www.reuters.com/article/latestCrisis/idUSL02355657

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52. Historical Eclipses Reliable records of solar and lunar eclipses go back as far as 750 B. C. They bear on such questions as whether the sun is shrinking or the earth is not http://hbar.phys.msu.ru/gorm/atext/histecl.htm

Historical Eclipses Reliable records of solar and lunar eclipses go back as far as 750 B. C. They bear on such questions as whether the sun is shrinking or the earth is not spinning as fast as it once did by F. Richard Stephenson Scientific American - 1982. - 247, N4. - 154-163 Observers on our planet×astronomers, historians and even poets×have been recording eclipses of the sun and the moon for more than 2,500 years. Whatever their motivation, their records, both ancient and more recent, can help to answer questions that challenge investigators today. One such question is: Why is the length of the day (or the earth's rate of rotation) changing? Another is: Is the sun shrinking? On the first question eclipse observations long before the rise of telescopic astronomy have provided information of much value. On the second only the records of total solar eclipses since the 18th century are pertinent. THREE PARTIAL SOLAR ECLIPSES (in 1530, 1532 and 1534) and three total lunar eclipses are predicted on this page of Calaulariurn Romanum Magnum, published in 1518. The author, Johann Stoffler of Tubingen, was a prominent Renaissance astronomer-mathematician. The handwriting in this copy of Stoffler's work, now in the library of the University of Uppsala, is that of Nicolaus Copernicus. We owe the term "eclipse" to the ancient Greeks: ekleipsis means "failure," in the sense of something gone wrong. The image is apt, and if the orbits of the earth and the moon were in exactly the same plane, these failures would be far more frequent: two per month. At each conjunction, or new moon, the sun would be eclipsed; at each opposition, or full moon, the moon would be eclipsed. Actually, since the orbital planes are tilted with respect to each other by some five degrees, eclipses can come only when the new or full moon happens to be near one of the two "nodes" of its orbit. These are the points, 180 degrees apart, where the plane of the moon's orbit intersects the plane of the earth's. This limitation means that any one year may have as few as two eclipses (the number in 1984) or as many as seven (the number this year).

53. Digg - Twelve Lunar Eclipses On Astronomy Picture Of The Day! Welcome to the extra day in the Gregorian Calendar s leap year 2008! To celebrate, consider this grid of lunar eclipse pictures starting in leap year 1996 http://digg.com/space/Twelve_Lunar_Eclipses_on_Astronomy_Picture_of_the_Day

@import "/css/101/global.css"; @import "/css/101/forms.css"; @import "/css/101/permalink.css"; @import "/css/101/comments.css"; @import "/css/101/lightbox.css"; aHash = "anonymous"; var pagetype = "permalink"; digg Join Digg About Login Username Password Remember? Search Digg... Popular Upcoming All News ... People Discover the best of the web! Learn more about Digg by taking the tour Twelve Lunar Eclipses on Astronomy Picture of the Day! Welcome to the extra day in the Gregorian Calendar's leap year 2008! To celebrate, consider this grid of lunar eclipse pictures - starting in leap year 1996 and ending with February's eclipse - with the date in numerical year/month/day format beneath each image. Mostly based on visibility from a site in Turkey. Submitted: 34 days ago , made popular 34 days ago Submitter: Share: Share Bury It: Bury Favorite: Favorite? diggs digg it Comments ( Who Dugg or Blogged It? Blog It Email It sort by most diggs sort by date (show all) sort by date (-10 or higher) sort by date (-4 or higher) sort by date (0 or higher) sort by date (+5 or higher) sort by date (+10 or higher) Hide Profanity Expand Full Tree Global Settings +1 diggs by JulyZerg on Wow, the one at the bottom left looks much different!

54. Eclipse-Chasers.Com Astronomy web site about solar and lunar eclipses. http://www.eclipse-chasers.com/

Welcome to Why see an Eclipse? A total solar eclipse is one of the most amazing astronomical sights one can see. In the field of terrestrial based astronomy there is little that compares to the wonderful interplay of orbital mechanics, cosmic coincidence, and spectacular dynamic views. For a few scant minutes the bright solar disk is completely covered by the moon; the sky is dark; brilliant sunset colors light up the horizon; the sun's corona shines around the inky lunar disk looking like a giant eye floating in the heavens; bright stars and planets are visible; then the diamond ring appears; some cheer; some cry; it is beautiful to behold. Why chase an Eclipse? A total eclipse of the sun is only visible along a thin 100 kilometer wide line slicing across the surface of the Earth. That means you don't have a great chance of seeing one by just staying in one place. You need to travel to the path of the shadow. Those of us that travel with our telescopes and cameras to that thin line in order to see eclipses are commonly known as Eclipse Chasers . These web pages are about adventures around the world to see the greatest show in astronomy. If you are an eclipse chaser please consider

55. The YouTube Effect HTTP Traffic Now Eclipses P2P The YouTube effect HTTP traffic now eclipses P2P. By Nate Anderson Published June 19, 2007 0946AM CT. In the Internet traffic race, P2P used to be http://arstechnica.com/news.ars/post/20070619-the-youtube-effect-http-traffic-no

Home Business Apple Gaming ... Security federated_media_section = "main"; Home News Articles Guides ... RSS From the Newsdesk The YouTube effect: HTTP traffic now eclipses P2P By Nate Anderson In the Internet traffic race, P2P used to be way out in front. For years, P2P traffic eclipsed HTTP traffic as broadband users slurped down music and movies, some of which were actually legal. But P2P fell behind this year; for the first time in four years, HTTP traffic is out in front. Ellacoya Networks, makers of deep packet inspection gear for carriers, has pulled together some statistics on one million broadband users in North America, and its findings show that HTTP traffic accounts for 46 percent of all broadband traffic. P2P applications now account for only 37 percent. Data source: Ellacoya Networks Chalk it up to YouTube and other Internet video sharing sites. The surge in HTTP traffic is largely a surge in the use of streaming media, mostly video. Breaking down the HTTP traffic, Ellacoya says that only 45 percent is used to pull down traditional web pages with text and images. The rest is mostly made up of streaming video (36 percent) and streaming audio (five percent). YouTube alone has grown so big that it now accounts for 20 percent of all HTTP traffic, or more than half of all HTTP streaming video. Looking over all the numbers, one of the most surprising result is the continued success of NNTP (newsgroups) traffic, which still accounts for nine percent of the total. Clearly, newsgroup discussions (and, ahem, binaries) are still big business.

56. Eclipse - Wikipedia, The Free Encyclopedia When an eclipse occurs within a stellar system, such as the Solar System, it forms a type of syzygy—the alignment of three or more celestial bodies in the http://en.wikipedia.org/wiki/Eclipse

Eclipse From Wikipedia, the free encyclopedia Jump to: navigation search This article is about astronomical eclipses. For other uses, see Eclipse (disambiguation) "Total eclipse" redirects here. For other uses, see Total Eclipse (disambiguation) This view from the International Space Station shows the shadow of the Moon cast upon the eastern Mediterranean Sea near Cyprus NASA image. An eclipse Ancient Greek noun έκλειψις ( ©kleipsis ), from verb εκλείπω ( ekle­pō ), "I cease to exist," a combination of prefix εκ- ( ek- ), from preposition εκ, εξ ( ek ex ), "out," and of verb λείπω ( le­pō ), "I am absent") is an astronomical event that occurs when one celestial object moves into the shadow of another. When an eclipse occurs within a stellar system, such as the Solar System , it forms a type of syzygy —the alignment of three or more celestial bodies in the same gravitational system along a straight line. The term eclipse is most often used to describe either a solar eclipse , when the Moon's shadow crosses the Earth's surface, or a lunar eclipse , when the Moon moves into the shadow of Earth. However, it can also refer to such events beyond the Earth-Moon system: for example, a planet moving into the shadow cast by one of its moons, a moon passing into the shadow cast by its parent planet, or a moon passing into the shadow of another moon. A

57. SDAC Eclipse Information Solar eclipse information at the Solar Data Analysis Center (NASA). http://umbra.nascom.nasa.gov/eclipse/

Solar eclipse information The SDAC is now serving NASA Eclipse bulletins via both WWW and anonymous ftp. See below for details. Quick Index Eclipse 2001 Eclipse research Eclipse Bulletins Other eclipse resources Flash! NASA Eclipse Bulletin for Total Solar Eclipse of 2006 March 29 The Bulletin is available online now. Eclipse 2002 Useful links: The Working Group on Solar Eclipses of the International Astronomical Union (IAU) The Public Education on the Occasion of Solar Eclipses Program Group of the IAU Commission on Education and Development Eclipse 2001 Useful links: Eclipse and local images taken by Bob Yen at a site on the Kabompo River in northwestern Zambia Eclipse images (raw) taken with the Newkirk camera (radially graded transmission) built by Jonathan Kern and used on the Williams College eclipse expedition Composite ground-based eclipse and SOHO EIT image shows what was going on behind the moon during totality. MuseumEclipse.org's Eclipse 2001 resources for museums

58. Eclipse, Bailey's Beads, Crystalinks Near the beginning and end of total solar eclipse, the thin slice of the Sun visible appears broken up into beads of light. These lights are called Baily s http://www.crystalinks.com/eclipse.html

Eclipse Near the beginning and end of total solar eclipse, the thin slice of the Sun visible appears broken up into beads of light. These lights are called 'Baily's Beads' after the British astronomer Francis Baily who discovered them. They occur because the edge of the Moon is not smooth but jagged with mountain peaks. When just one bead is visible, the effect is often likened to a diamond ring. A solar eclipse occurs when the Moon passes in front of the Sun and obscures it totally or partially. This configuration can only exist at New Moon, when Sun, Moon and Earth are on a single line with the Moon in the middle. There are four types of solar eclipses: A partial solar eclipse occurs when the Sun is only partially overlapped by the Moon. A total solar eclipse occurs when the Moon completely obscures the Sun. This happens when the Moon is near perigee and its angular diameter as seen from Earth is identical to or slightly larger than that of the Sun. A total solar eclipse is the only opportunity to observe the Sun's corona without specialised equipment. An annular (ring-formed) eclipse occurs when the Moon's center passes in front of Sun's center while the Moon is near apogee. The Moon's angular diameter is then smaller than that of the Sun so that a ring of the Sun can still be seen around the Moon. This is similar to a penumbral eclipse.

59. What Causes A Lunar Eclipse msnbc.com/news/wld/graphics/lunar_eclipse_dw.htm 2k - Cached - Similar pages BrainPOP - Animated Educational Site for Kids - Science, Social If so, you’ve watched a total eclipse! In this BrainPop movie, Tim and Moby will teach you all about what makes an eclipse happen. http://msnbc.com/news/wld/graphics/lunar_eclipse_dw.htm

60. Eclipse Chaser Home Page Total Solar Eclipse Articles, Experiments, Umbral Data, and Images. Sponsored by Versacorp, a provider of Systems Engineering and Technical Writing http://www.eclipsechaser.com/

Welcome to the Eclipse Chaser home page! http://www.eclipsechaser.com The totally cool, totally awesome, total solar eclipse web site. Winner of the Griffith Observatory Star Award for July 5-11 1998. Sponsored "totally" by Versacorp (TM, SM). Home of the Eclipse Chaser's Guide to... W W! and the Eclipse Chaser's Journal Legal Information Eclipse Chaser Contents: Astrophotography and Eclipse Books and Videos by the Author of this Web Site! Eclipse Chaser's Journal - 1979, 1991, 1994, and 1995 eclipses EclipseMovie Home Page: Eclipse Screenplay, Other Cool Stuff Images: Total Solar Eclipse Photo Gallery ... General information about the EclipseChaser web site Books and Multimedia By Versacorp or Versacorp Personnel Books Books / CDs / Video Practical Astrophotography a book by Jeffrey R. Charles (ISBN 1-85233-023-6) Published by: Springer-Verlag as Part of the "Practical Astronomy" Series. Available at Versacorp ($34.95 including shipping in CONUS) and at popular book stores, including border books / amazon.com

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