... Events . ... Unfortunately there are no eclipses to be seen from Ireland this month: neither the lunar one on 7 July, nor the solar one on 22 July. Next lunar eclipses visible from Ireland are the partial ones on 5/6 August 2009 (very hard to see with naked eye; 23:01:04 UT to 02:17:23 UT) and 31 December 2009 ( penumbral phase should be quite visible; 18:51:38 UT to 19:53:51 UT) . ... Friday, 3 July 2009 17:12 . International Year of Astronomy, Ireland National Node . ...

... Subject of Astronomy. ... Basis of Spherical and Practical Astronomy. ... Celestial Sphere. ... Changes of Star's Coordinates as a Result of Daily Rotation of Celestial Sphere. ... Time Measuring. ... Changes of Solar Equatorial Coordinates. ... Stellar Day, Stellar Time. ... Real Solar Time. ... Mean Solar Time. ... Connections between Stellar and Mean Time. ... Apparent Path and Configuration of Planets. ... Ways of Energy Transportation to Stellar Surface.Basis of Spectral Analysis. ... Solar...

Astronomy Picture of the Day . Solstice And Season's Eclipse . ... But this year, the solstice will be followed, on December 25th, by another geocentric celestial event -- the last eclipse of the millennium ! The Christmas day eclipse will only be a partial one as the silhouetted disk of the Moon obscures the Sun's edge. ... Publications with keywords: eclipse - solstice - partial solar eclipse - seasons . Publications with words: eclipse - solstice - partial solar eclipse - seasons . ...

... 2000 December 21 . Solstice And Season's Eclipse . ... This celestial event is known as a solstice, marking the beginning of Summer in the Southern Hemisphere and Winter in the North. But this year, the solstice will be followed, on December 25th, by another geocentric celestial event -- the last eclipse of the millennium ! The Christmas day eclipse will only be a partial one as the silhouetted disk of the Moon obscures the Sun's edge. ... About APOD | ...

... Bad Astronomy . Misconceptions . ... Bad Astronomy : "We're light years more advanced than our competition!" ... Even the closest astronomical object, the Moon, is 400,000 kilometers away! ... A beam of light will travel 9,500,000,000,000 kilometers in one year. This distance is defined as a light year ; the distance light travels in a year. ... This is another example of Bad Astronomy; like a light year, a parsec is a unit of distance, not time (to be specific, it equals 3.26 light years) . ...

ECLIPSES, TRANSITS OF MERCURY AND VENUS . Year 1999 . Year 2000 . Year 2001 . Year 2002 . Year 2003 . Year 2004 . Year 2005 . ... Total solar eclipse . ... Transit of Mercury across the solar disk . ... Total lunar eclipse . ... Partial solar eclipse . ... Partial lunar eclipse . ... Annular solar eclipse . ... Penumbral lunar eclipse . ... big map . ... Transit of Venus across the solar disk . ... Annular-total solar eclipse . ... Non-central annular solar eclipse . ...

Text of these problems is available also in other languages : . ... What can one see in the Moon's sky more often - the Sun or the Earth? ... There are about of 250 millions of stars in the elliptical galaxy M32 (a satellite of Andromeda galaxy). ... The masses of Capella's components. ... You are proposed to estimate the masses of Capella's components, using our observational data. ... A galaxy's mass. ... Estimate the mass of FGC 1908 and compare it to the mass of our galaxy. ...

... On the equator (point C) the sun would always rise until it was overhead, while at the poles (A and B) it would always be on the horizon, going around the horizon once a day. ... Because everything is symmetric with respect to the line AB, the dark and light portions are always equal, and so are day and night, anywhere on Earth. ... Twice a year, the angle is as big as it can get, at the summer and winter solstices , when it reaches 23.5 degrees. ... That part of Earth enjoys summer . ...

... The Seasons . ... Section #1 Stargazers and Skywatchers described the observed motion of the Sun across the sky, in different seasons of the year. ... If the Earth's axis were perpendicular to the ecliptic, as in the drawings here, the Sun's position in the sky would be halfway between the celestial poles, and its daily path, seen from any point on Earth, would stay exactly the same, day after day. Each point on Earth would be carried around the axis AB once a day. ... The Sun and Seasons . ...

astronomy . Astro Courses . ... IYA 2009 . ... Armagh Planetarium is proud to be associated with the International Year of Astronomy 2009 (IYA2009) . IYA 2009 is a global year of events celebrating all things associated with the absorbing science that is astronomy. ... IYA 2009 Autumn/Winter events . ... Here at Armagh Planetarium one of our most important objectives is to promote formal and informal science education and there will be activities celebrating IYA 2009 throughout the year. ...

... Our restless globe and its companion. ... A Look at the Motions of the Earth in Space and How They Are Changing . ... Earth's rotation as viewed from above the north and south geographic poles. ... The Earth revolves around the Sun-also counterclockwise viewed from above the North Pole, clockwise viewed from the South Pole-to give us our years (see Figure 2 ). The plane of the Earth's orbit is called the ecliptic (where eclipses happen). ... Earth's orbit as viewed from the north ecliptic pole. ...

... 2001 January 18 . 2001: A Total Lunar Eclipse . ... Explanation: The first and only total lunar eclipse for the year 2001 occured on the evening of January 9/10 as the full Moon glided through Earth's shadow. ... The fact that the northern (top) portion of the eclipsed Moon is clearly brighter, even near mid-totality, demonstrates that Earth's shadow is not uniformly dark. Tomorrow's picture: Black Holes Are Black . ... About APOD | ...

2012 - 2013 . ... Arithmetic seminar . ... Diophantine Geometry " . Global Fields" . ... Metric Diophantine approximation on the middle-third Cantor set . ... More than eighty years ago, Jarn k and, independently, Besicovitch established that the Hausdorff dimension of M( ) is equal to 2/ . ... This study relies on dimension estimates concerning the set of points lying in an Ahlfors regular set and approximated at a given rate by a system of random points. ... Poncelet Laboratory home page . ...

... Direct data transmission rate (Mbps) . ... the density of electron fluexs with energies in four bands from 0.04 MeV to 1.7 MeV; . ... sensor (TV, IR) data and heliogeophisical information (HGI) transmission to data receiving and processing centers at a rate of up to 2.56 Mbps; . ... 1.76 GHz - TV- and heliogeophysical information and DCLI's data transmission to data receiving and processing centers; . 7.5 GHz - TV- and heliogeophisical data transmission to data receiving and processing centers; . ...

Lectures . ... 100 Years of Cosmology: From Spiral Nebulae to the Cosmic Microwave Background.тАЭ ? ... Michael Way, astronomer/computer scientist at NASAтАЩs Ames Research Center and its Goddard Institute of Space Studies, will give the first lecture of the AAAтАЩs 2009-10 lecture series Friday, October 2 when he discusses тАЬ100 Years of Cosmology: From Spiral Nebulae to the Cosmic Microwave Background.тАЭ The free public lecture is at 6:15 p. m. at the Kaufmann Theater of the AMNH. by . ...

GRANAT is the Russian x-ray sattelite launched to the high apogee orbit (200,000 km) and operated almost for 10 years (1989 -1999) , carrying out four major instruments: French SIGMA coded-mask hard x-ray telescope (30-1000 keV), Soviet ART-P coded-mask telescope (2??-60?? keV), all-sky monitor WATCH (6-150 keV), and a gamma-burst detector PHEBUS . ... Since September 1994, GRANAT is in the survey mode. ... Explore pages devoted to individual GRANAT instruments (including main scientific results): . ...

... Current APO Weather . ... Search Site . ... Information for New Users . ... Technical Staff pages . Night Logs and Mailing Lists (maintained by APO) . ... Technical Documents and Database Search . ... Observer's Documentation and Procedures . ... Problem Reporting and APO Technical Documents Database Search . ... APO Drawing/Document Management Procedures . ... APO Technical Documents Database Search . Home Astrophysical Research Consortium . ... Mail Lists (maintained by APO) . ...

... This file is read by the pointing program and the irigServ program when they are started. Both of these programs are running on the vme pointing crate. ... Instead of rebooting the pointing crate, we just stop the pointing program and restart it.. this gets around a race condition when the pnt clock is being syncronized and the pointing program is asking for the utcToUt1 info.. ... Leap seconds are transmitted 0 hr 01jan UTC. ... Have the pnt program and irigServ program reread the year file. ...

... Recent Topics . ... MAO main . ... Swift: 10 years of discovery, conference reminder . ... Кому: Ця електронна адреса захищена в?д спам-бот?в. вам потр?бно ув?мкнути JavaScript, щоб побачити ?? ... Отправленные: Понедельник, 19 Май 2014 г 12:30:38 . Тема: > > : Swift: 10 years of discovery, conference reminder . В?д: SWIFT 10 Years Meeting [ Ця електронна адреса захищена в?д спам-бот?в. вам потр?бно ув?мкнути JavaScript, щоб побачити ?? ... Swift: 10 years of discovery? ...

... Tonight's Sky . ... The Magazine . News . Observing . ... Magazine . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Open cluster NGC 2818, spiral galaxy NGC 2964, and spiral galaxy NGC 2976 . ... Astronomy for Kids . ... Year of Pluto . ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Astronomy Magazine . ...