... 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 . ...

... 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 | ...

... The December solstice brings the beginning of Winter to Earth's Northern Hemisphere and Summer time to the South! This view of Earth's Southern Hemisphere near the beginning of Summer was created using images from the Galileo spacecraft taken during its December 1990 flyby of our fair planet. ... Night and Day in Melas Chasma on Mars . ... Part of the answer comes from thermal imaging by the robot spacecraft 2001 Mars Odyssey currently orbiting Mars. ... IC 418: The Spirograph Nebula . ...

... Events . ... The orbit of the Moon is too small to be seen on this scale, but the 2008 December 1st alignment was especially interesting because additionally Venus was occulted by the Moon (this occultation was visible from Europe and NW Africa). Some more photos of the 1 December events received from Jonathan Bingham . ... Venus coming out from behind the Moon; photograph by Jonathan Bingham . ISS; photograph by Jonathan Bingham . ... International Year of Astronomy, Ireland National Node . ...

... Bad Astronomy . ... I think I will break from my usual format of Bad Astronomy/ Good Astronomy by saying that the way we define seasons currently is not strictly bad, but I feel (in my opinion!) that it could be better. The definition of when the seasons begin is at the moment of solstice or equinox; that is, winter (in the north) starts on December 22 nd and summer starts on June 22 nd . ... Now imagine breaking up the Sun's 46 degree up-and-down yearly swing into 1 day intervals. ...

NOVAC Newsletter - Reflections On 1982 . Articles | ... Richard Lawson . ... Attending this observation was Nils Thomas, John Huggins, Richard Lawson, Bob Koberg and his kids, David Edwards and Bryan Bloomer. ... Nils, John, Richard and A.J. Piccillo met for the July lunar eclipse. ... Twelve days later Nils, John, Richard, and Ian Babcock attended a scheduled NOVAC observation. ... Attending were Nils, John, A.J., Richard and Blaine Korcel. ... www.astronomy.net . About Astronomy Net | ...

... HST . ... Data . ... News and . ... HST Overview . Overview . ... HST Spectroscopy STIS/GHRS/FOS | ... Change of Supported Apertures for E230H Exposure Time Incorrect in Interrupted STIS Exposures CALSTIS 2.0 Released Improved Cosmic Ray Rejection Parameters for STIS New STIS Reference Files CCD Hot-Pixel Alert for STIS Spectroscopic Observations STIS Fringing Tutorial Now Available GHRS `poffsets' Task not Reliable for Weak Data FOS Paper Products Now Support Spectropolarimetry ...

... December 30, 1998 . Supernova 1994D and the Unexpected Universe . Credit: High-Z Supernova Search Team , HST , NASA . Explanation: Far away, long ago, a star exploded. ... Supernova 1994D was not of interest for how different it was, but rather for how similar it was to other supernovae . ... The large number and great distances to supernovae measured in 1998 have been interpreted as indicating that we live in a previously unexpected universe . ... About APOD > . ... NASA Technical Rep.: ...

... Archive for December 2010 . ... Posted by vlk . ... Tags: Bayesian , coin toss , priors . Category: Bayesian , Stat | Comment . ... Entries RSS . Comments RSS . ... 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 . ... Entries (RSS) and Comments (RSS) . ...

The points are analogous to ones for the 4 th , 5 th , 6 th and 7 th Asian-Pacific Astronomy Olympiads . ... National Astronomy Olympic Committees and interested organizations are welcome to ask more about the 8 th APAO and in 2012 may form the teams for the 17 th IAO as well as for the 8 th APAO. The official APAO e-mail is a p a o [a] l i s t . ... Dr. Michael G. Gavrilov, Founding Chairman and Coordinator of the Asian-Pacific Astronomy Olympiad (APAO) . ... e-mail: gavrilov@issp.ac.ru . ...

... 2015 - 2016 . ... Eugene Higgins Professor of Astrophysics, Princeton University . ... December 8, 2015 . ... November 10, 2015 . ... University of the Sciences in Philadelphia author . ... Amateur Astronomer . ... 2014 - 2015 . ... June 9, 2015 . ... Digital Planetarium and the 2012 Transit of Venus from Hawaii . 2013 - 2014 . ... International Occultation Timing Association . ... 2012 - 2013 . ... 2011 - 2012 . ... Princeton University . ... Amateur Astronomers Association of Princeton, Inc., ...

Russian . ... text in Russian) . ... The Behaviour of the Bz Component of the Magnetic Field in Coronal Mass Ejections . ... Cooperation of IZMIRAN and Sternberg Astronomical Institute in the Study of the Sublimational Component of the Solar Coronal Radiation . ... Solar Wind and Magnetic Storms in the 24th Solar Activity Cycle . ... text in English) . ... The Solar Corona in the Light of TRACE Observations . ... Expeditions of Irkutsk Astronomers to Total Solar Eclipses in 1981--2012 . ...

Astronotes Armagh Planetarium's Stellar Blog! ... Space Flight . ... January . ... March . ... Posted on January 7, 2016 | 6 Comments Happy New Year! ... Continue Reading.. ... Posted on December 5, 2014 | ... Posted on March 13, 2014 | ... 2 Comments While the winter sky may be the тАШAladdinтАЩs caveтАЩ for skywatchers, and we may already have plundered deeply one of its greatest celestial treasures, the constellation of Orion, we forge [ ] . ... Posted on January 16, 2014 | ...

... Home Education Workshops at Adorama Astro Imaging Workshop: Planetary Astro Imaging with a DSLR ? December 7, 2014 . ... Astro Answers . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... Presented by€а Adorama€а For the Amateur Astronomers Association of New York . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

... Magnetic storms online . ... Geomagnetic activity forecast . ... December : 2015 . ... No magnetic storm is expected . From 2 December 2015 to 28 December 2015 the following magnetic storms and disturbances are expected: . December 06, 2015 geomagnetic disturbances . ... December 08, 2015 geomagnetic storm of level G1 (minor) . ... December 21, 2015 geomagnetic storm of level G2 (moderate) . ... December 16, 2015 geomagnetic storm of level G1 (minor) 2 December 2015 - 28 December 2015 . ...

A Christmas Carol Featuring Ghosts · Past · Present · Future Eric Torrence 1/9 December 2004 The Ghost of Christmas Past 7 Preliminary Analyses Presented Very impressive showing, broad physics interests 14 AWG readers, 21 RC members,.. ... Eric Torrence 3/9 December 2004 Ghost of Christmas (near) Future We are trying to get two Moriond Tau talks (one EW, one QCD) Publications of Tau04 results would be a natural reason to argue for these talks CWR must start no later than Feb. 11th! ...

Friday, December 7th, 2012 . ... No Comments ? Monday, December 3rd, 2012 . Добавлена страничка со списком публикаций сотрудников лаборатории за 2012 год. ... You are currently browsing the Лаборатория лазерной интерферометрии blog archives for December, 2012. ... Публикации за 2010 . Публикации за 2011 . Публикации за 2012 . ... January 2013 . December 2012 . ... January 2012 . ... January 2011 . ... Лаборатория лазерной интерферометрии is proudly powered by WordPress . ...

home publications > mercury . SEARCH ASP SITE: Match ALL words Match ANY word . ... ASP Conference Series . Monograph Publications . IAU Publications . ... Publications of the ASP (PASP) . ... Astronomy Beat . ... Mercury Magazine Contents . ... November/December 1998 . ... The study of this debris has intrigued astronomers for more than 300 years. ... Sci-Fi in the Classroom: Making a "Deep Impact" on Young People's Interest in Science, Leroy W. Dubeck and Rose Tatlow . ... publications . ...

... The aim of the conference is to bring together a community of researchers interested in arithmetic geometry and its applications. We hope that a collaborative, casual atmosphere will stimulate fruitful interactions between pure arithmetic geometers and those working on more applied aspects. ... Methods involving modular forms and automorphic representations . ... Explicit aspects of moduli spaces . ... Christian Berghoff (Paris, Bonn) . ... Elisa Lorenzo Garcia (Leiden) . ... Marc Hindry (Paris) . ...