... Sighting the telescope, first at the tree and then at pole B, you measure the angle A of the triangle ABC, equal to the difference between the numbers you have read from the azimuth plate.. ... Why triangles? ... One large surveying project of the 1800s was the " Great Trigonometric Survey " of British India. ... Everest was the one who commisioned and first used those giant theodolites; they are now on display in the Museum of the Survey of India in Dehra Dum. ... Everest . ...

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... Credit: M. Brown ( Caltech ), C. Trujillo ( Gemini ), D. Rabinowitz ( Yale ), NSF , NASA Explanation: Is that a tenth planet? A faint, slowly moving dot discovered by computer shows clear signs of being a deep Solar System object at least as large as Pluto . The object, designated 2003 UB 313 , is currently situated nearly 100 times the Earth-Sun distance -- over twice the average Pluto-Sun distance. ... Since 2003 UB 313 is surely not completely reflective , it could be substantially larger. ...

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• XWare > APOD

Supernova 2009js in NGC 918 . This page is devoted to information on Supernova 2009js in NGC 918 . Basic information on this SN, including the last reported brightness, on this Supernova can be found on the main page . Information on the original web pages for many of these images can be found on the updates and links web pages. Discovered independently by Lick Observatory Supernova Search (USA) and Koichi Itagaki (Japan). ... 2009/10/11.44 . 17.2 . ... Joseph Brimacombe . ...

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• Extragalactic Novae - 2002.
• Extragalactic Novae - 2001.

. Computer Ephemeris. Lunar equatorial positions. Explanations. Each row contains at 0 h and 12 h of Time Dynamical Terrestrial: month, day, apparent right ascension (hours, minutes, seconds), apparent declination (degrees, minutes, seconds of arc) and geocentric distance (in Earth's radii).

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• Central meridian positions for physical observations of Uranus for Computer
• Central meridian positions for physical observations of Saturn for Computer
• Central meridian positions for physical observations of Neptune for Computer

Discover the cosmos! ... 2005 July 31 . Solar System Object Larger than Pluto Discovered . ... A faint, slowly moving dot discovered by computer shows clear signs of being a deep Solar System object at least as large as Pluto . The object, designated 2003 UB 313 , is currently situated nearly 100 times the Earth-Sun distance -- over twice the average Pluto-Sun distance. ... Since 2003 UB 313 is surely not completely reflective , it could be substantially larger. ... About APOD | ...

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• APOD: July 6, 1996 - Edmund Halley's Greatest Discoveries
• APOD: 2000 March 30 - Saturn-Sized Worlds Discovered
• APOD: May 20, 1998 - Discovery Image: Comet SOHO (1998 J1)

Asteroid 2004 MN4 was discovered on the 19th of June 2004 by Roy Tucker, David Tholen and Fabrizio Bernardi of the University of Hawaii Asteroid Survey from Kitt Peak Arizona. ... After a few days it was recognized that it would make several close approaches to Earth in the 21st century. ... These distances were calculated by the Near Earth Object Dynamic Site using data available up to 2005 February, to check for updates go to Near Earth Object Dynamic Site . ... PHA Close Approaches To The Earth . ...

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• Another Irish Asteroid Discovery | International Year of Astronomy in Ireland |
• Armagh Observatory
• Asteroid Discovery 1890 - 2010

A team of U.S. and German astrophysicists have made the first ever detection of X-rays coming from a comet. ... Following the initial detection, the team reported repeated X-ray emissions from the comet over the next 24 hours. ... One preliminary theory is that X-ray emission from the Sun was absorbed by a cloud of gaseous water molecules surrounding the nucleus of the comet, and then were re-emitted by the molecules in a process physicists call "fluorescence." ... Comets . ...

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• People
• Chronology of Solar System Discovery
• Parallax

... Posts tagged ?AstroStat? ... Statistical Challenges in Modern Astronomy V (including summer school & tutorials) . ... Category: Astro , News , Stat | ... Continue reading ?AstroStat Summer School [Announcement]? Tags: 2010 , AstroStat , June 2010 , Penn State , summer school . ... Tags: 2009 , Announcement , AstroStat , August , Heidelberg , IMPRS , IMPRS-HD , inference , Max Planck , summer school . ... Tags: 2009 , Announcement , AstroStat , June , Penn State , summer school . ... CAS 2010 . ...

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• The AstroStat Slog false discovery
• The AstroStat Slog computer science
• The AstroStat Slog Blog Archive [Jobs] postdoc position at UC Berkeley

... English astronomer and mathematician. ... American astronomer. ... Bond, William Cranch 1789-1859 . ... At the observatory, he studied Saturn and (with William Lassell ) discovered its moon Hyperion . ... Polish astronomer who advanced the heliocentric theory that the earth and other planets revolve around the Sun. ... Galileo Galilei 1564-1642 . ... Van Allen discovered the Earth's radiation belts, which now bear his name, with an instrument aboard the first successful American satellite, Explorer...

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• The Discovery and Early Study of Shoemaker-Levy 9
• The Discovery of the Galilean Satellites
• Chronology of Solar System Discovery

... The HST uses an onboard model of its orbit to perform in real-time various control functions relating to spacecraft operations and observation support. ... New coefficients for the ephemeris are updated every other day, and are archived as FITS keywords for each HST observation data set. Using these coefficients,an observer can perform a variety of calibration and characterization calculations relating to the orbital position and velocity of the telescope. ...

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• A New PROS Task for Calculating HRI Source Intensities or Upper Limits

Follow-up astrometry and recoveries are made with the ANU 40 inch (1.0-m) f/8 reflector at Siding Spring Observatory (IAU code 413). ... A routine follow-up of 2003 WY153 on 2003 Dec 15 became much more than routine when a faint object with unusual motion vector was found close to the target asteroid. ... During routine astrometry with the 1.0-m to improve the orbit of the Apollo asteroid 2004 CB, the asteroid was found on March 30 to have a short tail! ... Siding Spring Survey Main Page . ...

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• Observational Techniques: Computer Notes
• C/2006 P1 (McNaught)
• THE AUSTRALIAN NATIONAL UNIVERSITY

The small solids. Asteroids or the small planetes . ... The comets. ... Ceneca the Young.Procuring about the nature.63 y. The comet is a celestial body of a great size, but a rare one... transparent. Sometimes there seen a core and the medium forms a kind of a tail, beard or dishevelled looks. ... The core is an ice body - conglomeration of frosted gas and dust. ... The comet state is variable: ones have the con tails, others the dust tails, and the third have both. ... Meteors and meteo