... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2004 February 29 . Julius Caesar and Leap Days . ... In 46 BC, Julius Caesar , pictured above in a self-decreed minted coin, created a calendar system that added one leap day every four years. ... By adopting a leap year with an extra day every four years, the calendar year would drift much less. ... Calendar | ... About APOD | ...

... Wikimedia Explanation: Today, February 29th, is a leap day - a relatively rare occurrence. In 46 BC, Julius Caesar, featured here in a self-decreed minted coin, created a calendar system that added one leap day every four years. Acting on advice by Alexandrian astronomer Sosigenes, Caesar did this to make up for the fact that the Earth's year is slightly more than 365 days. ... So, if calendar years contained 365 days they would drift from the actual year by about 1 day every 4 years. ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2000 February 28 . The Sombrero Galaxy from VLT . ... FORS1 , VLT ANTU , ESO . ... Reasons include the Sombrero 's unusually large and extended central bulge of stars, and dark prominent dust lanes that appear in a disk that we see nearly edge-on. Billions of old stars cause the diffuse glow of the extended central bulge. ... About APOD | ...

Astronotes Armagh Planetarium's Stellar Blog! ... Moon . Planets . ... Monthly Sky Notes . ... February . ... The ringed planet will be quite bright, but unlike Jupiter it will not be the brightest point of light in the sky, this accolade will return to Sirius which is the brightest star in our night sky in the constellation of Canis Major. ... Seven days later on February 18, the Moon will be in its full Moon phase. ... Tweets that mention Wonders of the February Night Sky | ... Astronotes . ...

... Sun images . ... Sun flares . ... Active areas . February : 2009 . ... No sunspots and sunspot groups can be currently observed on the Sun's surface . No H-alpha plages without spots can be currently observed on the Sun's surface . Last updated: February 10, 2009 00:00 UT . ... 1953-2016 Laboratory of X-ray astronomy of the Sun, LPI RAS, Russia . ... 7(499)132-65-96, Fax: +7(499)132-65-97 . ...

home publications > mercury . SEARCH ASP SITE: Match ALL words Match ANY word . ... ASP Conference Series . ... Reacting to the Size and Shape of the Universe . Mercury, January/February 2001 Table of Contents . As astronomers have changed how humanity has perceived the universe, the great writers and poets have risen to the challenge. by Chris Impey . ... In this eloquent and inspired essay by astronomer Chris Impey, great science and great literature are shown to walk hand-in-hand. ...

I added a new directory search to Zope, which returns the important fields for an individual user. ... I finished changes to the ldap search product and asked it to be moved to production. ... I ran some reports to track down our problem childrenin Active Directory. ... I'm working on a fix to the employee update sscript. ... The problem with the employee update script proved to be more elusive than I thought. ... I finished changing the employee update script to remove employees who have left. ...

... 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" . ...

... galaxies . ... black holes . ... Fast radio burst "afterglow" was actually a flickering black hole . New research shows that the radio emission believed to be an afterglow actually originated from a distant galaxy's core and was unassociated with the fast radio burst. ... New research by Harvard astronomers Peter Williams and Edo Berger shows that the radio emission believed to be an afterglow actually originated from a distant galaxy's core and was unassociated with the fast radio burst. ...

... About ATNF overview . ... Australia Telescope Steering Committee . ... Parkes radio telescope . ... A simple but quite useful cursor for three-dimensional position determination is a modification of the familiar two-dimensional cursor. ... The position of the two-dimensional cursor is then projected back into the volume and an estimate is made of the depth down the ray the feature the user sees. ... Hence, the user cannot use stereo to assist in perceiving depth if using the active cursor. ...

We hosted an interdisciplinary two-day workshop on Solar Astronomy and Statistical inference at the CfA on Feb 16-17, 2012. ... Format: On the first day of the workshop, we had two tutorial sessions, one describing solar data for statisticians and the other describing statistics methods for astronomers. ... Presentation slides and video recordings are available via SIP (see links in session schedule details below). ... Video [.mov] (@SIP) . ... Massive solar data streams -- Alisdair Davey (CfA) . ...

... Home Lectures Lecture Series 2015-2016 . ... Lecture Series 2014-2015 . ... Beyond New York City . ... The Amateur Astronomers Association is proud to present an astronomy lecture series from October through May each year for our members and the public. ... Amateur Astronomer Association is pleased to announce we will be offering select, limited reserved seating for current AAA members for the Friday, January 8, 2015 AAA Lecture entitled Robert Nemiroff ?2015 Astronomy Picture of the Day?. ...

... 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. ...

... ESO, the European Southern Observatory . ... Travel and Contacts . Travel to ESO Headquarters . ... ESO . ... Survey Telescopes . ... ESO Supernova . ... Star Clusters . ... Stars@ESO . ... ESO 3.6-metre telescope . ... MPG/ESO 2.2-metre telescope . ... ESO 1-metre Schmidt telescope . ... Future Projects . ... This NASA/ESA Hubble Space Telescope image shows the positions of the past, present and predicted future appearances of the Refsdal supernova behind the galaxy cluster€а MACS J1149+2223 . ...

Next: stecf.impol - Package Tasks Up: stecf.impol - an IRAF Previous: stecf.impol - an IRAF . All the instrumental set-up, such as filters, polarizers, rotation angles, etc. are read from the image headers. Many input images ( 3 < N < 64) can be processed. ... Output images can be rebinned to increase the polarization signal-to-noise per output pixel. ... Output error images have fully propagated statistical errors from the input error images. ...

... Previous: Literature and Catalogs in Electronic Form: Questions, Ideas and an Example: the IBVS . ... Astronomers can use the ADS to maintain their publication lists; a simple http link can bring a current bibliography at any time. ... For example the following links to Martha Hazen's bibliography. http://adsabs.harvard.edu/cgi-bin/abs_connect?author=hazen,m. &aut_syn=YES&nr_to_return=all . ... To have a complete bibliography via ADS one needs but to add the missing articles into ADS. ...

Semiconductor Home > Products > Mixed Signal and Analog > CCD IMAGERS Family > . TC213, 1024- X 512-PIXEL CCD IMAGE SENSOR . ... The TC213 is a frame-transfer charge-coupled device (CCD) image sensor that provides very high-resolution image acquisition for image-processing applications such as robotic vision, medical X-ray analysis, and metrology. The image format measures 12.00 mm horizontally by 6.12 mm vertically; the image-area diagonal is 13.5 mm. ... 13.5-mm Image-Area Diagonal . ...

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... European Remote Sensing Satellite (ERS-1) was launched on 17 July 1991, and the follow mission ERS-2 (with the same sensors and an Ozone monitoring instrument added) was launched on 21 April 1995. ... ERS-2 has a fixed repeat cycle of 35 days, and follows ERS-1 tracks with one day's delay. ... Swath width is 102.5 km (telemetered), spatial resolution is about 25x25 m. The Advanced SAR (ASAR) instrument is carried by ESA's ENVISAT satellite launched on 1 March 2002. ... Swath . ... Spatial Resolution...

... Other Characteristics of the Sun: Variability of Rotation, Magnetism, Chemical Structure, Planetary System. ... Methods of Solar Magnetic Fields Measuring: Visual, Photografic, Photoelectric. ... Empiric Datas of Magnetic Fields in Photosphere, Chromosphere and Corona. ... Characteristics of Magnetic Field in Balanced Force Tubes by Potential and Forceless Field. ... Phenomenons in Active Region (Magnetic Field, Spots, Torches, Solar Prominences, Flares, Discharges. ... Magnetic Fields in Flares. ...