... 2003 December 17 . A Proton Aurora . Credit: IMAGE Satellite , NASA . ... Triggered by solar activity, normal auroras are caused by collisions between fast-moving electrons and the oxygen and nitrogen in Earth's upper atmosphere. ... Such a proton aurora is seen above, recorded by the IMAGE satellite . ... Most solar wind protons never reach the Earth to cause auroras because they are completely deflected away at a great distance by the Earth's magnetic field . ... About APOD | ...

... December 8, 1996 . Degas Ray Crater on Mercury . ... Explanation : Like the Earth's Moon, Mercury is scarred with craters, testifying to an intense bombardment during the early history of the Solar System. ... In the above mosaic the bright rays emanating from the 27 mile wide Degas crater almost appear to be painted on . The rays consist of light colored material blasted out during the crater's formation. Numerous smaller, younger craters are seen superposed on the Degas crater itself. ...

... Главная . ... Новости . ... Проекты . Любителям астрономии . Проект ISON . ... Подробнее . ... Категория: Новости проекта ISON . ... Метки: Космический мусор ,љ Астероиды ,љ Гамма-всплески ,љ Любителям астрономии ,љ Кометы љ . ... Метки: Космический мусор ,љ Астероиды ,љ Любителям астрономии љ . ... Новости обсерваторий проекта] - Обсерватория Кубанского государственного университета от Иванов А - 09.04.2016 11:08:49 . ... 1999-2013 Copyright "Астрономия и Телескопостроение" . ...

... Summer at the South Pole . ... 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. Simulated Supergiant Star . ... Consider this "star in a box". ... Sgr A: Fast Stars Near the Galactic Center . ... Oceans Under Jupiter's Ganymede . ... December 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 . ...

Astronotes Armagh Planetarium's Stellar Blog! ... Stars . ... Space Flight . ... Monthly Sky Notes . December . ... Would anyone turn down a good firework show in December? ... The Geminids meteor shower should then emerge in all its glory in the east in the constellation GeminiтАЩs patch of sky on the evening of the 13 th and early morning of the 14 th of December, with the last shooting stars visible up until the 18 th December and approximately one meteor per hour on display at that stage. ...

Armagh Observatory, 21 December 2001: . ... The Armagh Observatory's contribution, led by astronomers Simon Jeffery and Gerry Doyle , is to develop new computational tools to study the atmosphere of the Sun and other stars. ... Computers will communicate with one another using the grid, and computing power will become a commodity just like electricity. ... FOR FURTHER INFORMATION CONTACT: Simon Jeffery or Mark Bailey at the Armagh Observatory (Tel.: ... WWW contact: webmaster@star.arm.ac.uk . ...

... Hiorter and Celsius note that the polar aurora is accompanied by a disturbance of the magnetic needle. ... Richard Carrington in England observes a violent and rapid eruption near a sunspot; 17 hours later a large magnetic storm begins. ... Using it he observes a solar flare and confirms the connection between flares and magnetic storms. ... Explorer 1, launched by the US January 31, observes the radiation belt; Explorer 3, launched in March, comes up with the first clear evidence for its existence....

The "ring of fire" seen by satellite cameras around the polar caps (picture below) is probably created by electrons leaking from the tail's plasma sheet, whose magnetic field lines form a somewhat imperfect trap. ... One possible explanation involves the close association between auroral arcs and electric currents which flow along field lines between the ionosphere and distant space ( Birkeland currents ). ... That produces an extra resistance to the flow of current. ...

... 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 . ...

... Articles | ... Forums . ... 230 deg . 49 deg . ... 130 deg . ... More Info . ... 210 deg . ... 168 deg . ... 249 deg . ... 195 deg . ... 271 deg . ... 110 deg . ... 338 deg . ... July 15 . 247 deg . ... 224 deg . ... 340 deg . ... July Phoenicids (PHE) . ... August 10 . 341 deg . ... 339 deg . ... 307 deg . ... 334 deg . ... 335 deg . ... 286 deg . ... 327 deg . ... 262 deg . ... 102 deg . ... 153 deg . ... 117 deg . ... December 2 . ... 123 deg . ... 100 deg . ... www.astronomy.net . ...

... Archive for December 2009 . ... Posted by hlee . ... Category: Algorithms , arXiv , Cross-Cultural , Jargon , Methods , Quotes , Stat , Uncertainty | Comment . ... Category: arXiv , Astro , Stat | ... 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 . ...

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 . ...

... The expansion is measured as a number called the Hubble Constant . ... Our value is about 20% lower than the one got with the Hubble Space Telescope in 1994," said Dr Jim Lovell, leader of the team that made the measurement. The Hubble Constant is named after American astronomer Edwin Hubble, who in the 1920s found that other galaxies were moving away from ours. ... The Hubble Constant links the galaxy's distance with its speed." ... A short run-down on the Hubble Constant: . ...

... Bad Astronomy . ... Mad Science . ... Site Info . ... Public Talks . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Who is this guy who calls himself "The Bad Astronomer?" ... First, yes, I am a real live astronomer (when people ask me what astronomers do, I tell them "They astronom !" ... These are emitted by powerful objects like black holes, exploding stars, and super-dense neutrons stars. ... Finally, am I really a bad astronomer? ... 2008 Phil Plait. ...

... Outreach . ... I'm a PhD student at the Australian National University's Mt Stromlo observatory and am part of the Australia Telescope National Facility (ATNF) graduate program. I study the properties on nearby galaxies and investigate the evolution of the local universe. ... I run the RSAA Student Outreach Group which invites school children to participate in free astronomy outreach evenings. ... Copyright 2007 Emma Kirby. ... All Photos were taken by Emma Kirby unless otherwise stated. ...

Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... November 9, 10, 11, 12 and 13 . December 6, 7, 8 and 9 March 24, 25, 26, 27 and 28 . ... December 3, 4 and 5 February 13, 14 and 15 . ... December 10, 11, 12, 13 and 14 . Incoherent Scatter Radar ionospheric parameters measurements are carried out on coordinated days determined by the International Geophysical Calendar. ...

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 . ...

... HST . ... Data . ... HST Peer Review Process . ... HST Overview . ... Phase I Proposing . ... Retrieving HST Data . ... ETC . ... COS Data Handbook . ... December 2012 +--------------------------------------------------------+ In this Newsletter we provide some updates of interest to COS and STIS users who will be drafting and submitting Phase 1 HST programs over the next several weeks. ... Exposure Time and S/N calculated by the ETC for the G130M/1055 and G130M/1096 Settings are not correct . ...

... 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., ...