... KTP Specifications Flatness Scratch/Dig Code Parallelism Perpendicularity Angle Tolerance AR Coating Wavefront Distortion Dimension Tolerance Clear Aperture /8 at 633nm 10/5 to MIL-O-13830A < 20 arc seconds 5 arc minutes < ± 0.5°, < ± 0.5° R < 0.2% at 1064nm and R < 1.0% at 532 nm < /4 at 633nm (W ± 0.1 mm) x (H ± 0.1 mm) x (L + 0.2 mm/- 0.1 mm) > 90% of central area Standard Products Part No. ...

Click for a video of the pendulum . ... In 1851 Leon Foucault (1819-1868) was made famous when he devised an experiment with a pendulum that demonstrated the rotation of the Earth. Joseph Ashbrook's book, The Astronomical Scrapbook , (Cambridge University Press, 1984) has a short chapter on Foucault's contributions to astronomy. ... Click here for more a detailed pdf document (5MB) about the University of Louisville's Foucault pendulum along with technical notes and the original working drawings. ...

... The first comparison of the SOHO/EIT and mosaic TRACE modified images at the same wavelength (171 A) received after the SOHO repair. There is a minute coincidence of the large-scale EUV chains on these images received with two different space observatories SOHO (a) and TRACE (b). ... Back to the page of the SOHO/EIT and TRACE chains . Back to the parent page . ...

The starting page - The catalogues page - The list of the PUL2 fields - The list of the Pul-3(Pul-3SE) fields - The list of the PUL_ERS fields . please read short description of the access form controls . ... Right Ascension (ICRF/Tycho-2) J2000 at the central epoch of obs. (hours, minutes, seconds) (Obligatory parameter) . ... proper motion in RA (*cos(DE)) (ICRF/Tycho-2). (mas/yr) . ... Check the apropriate checkbox to output these data and radiobutton to select stars within interval. ...

. Spicules in the solar chromosphere are the separate columns of radiant plasma, seen in the monochronical light (in the spectrum lines H, He, Ca+, etc). Their height is 6 -10 thousand kilomiters, their diameter is 200 - 2000 km, the time of life 5 - 7 minutes. There are several hundred thousands spicules on the star. Back .

Stellarium 0.12.3 . ... Classes . ... AngleSpinBox Class Reference . A spin box for displaying/entering angular values. More... #include < AngleSpinBox.hpp > . ... virtual voidљ . ... Set the value to default 0 angle. ... AngleSpinBox (QWidget *parent=0, DisplayFormat format= DMSSymbols , PrefixType prefix= Normal ) . ... Set the display format. ... the value to set, in decimal degrees. void AngleSpinBox::setDisplayFormat . ... the value to set, in radians. void AngleSpinBox::valueChanged . ...

... Gallery . ... Home Gallery Astrophotography Stanley Fertig Gallery . ... Lecture Series 2014-2015 . ... Clear Sky Chart . ... This Month's Sky - 2015 . This Month's Sky - January 2015 . ... Stanley Fertig Gallery . ... 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 . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

... Full silvery Moon illuminates terrain. ... Begun a next moon eclipse, when Land barriers a Moon from the Sun and throws its shade on it. ... Drawing 1. ... Drawing 6 Drawing 6 shows a splendid photo of full moon eclipse 18-19 november 1975 during is packed phases doing Dennis de Chikko. ... Eclipse, which will occur 9 november 2003, is a repetition through сарос (cycle of repetitions of eclipses equal 6585 days or 18 years 11 days) full moon eclipse from 28 octobers 1985 with the maximum phase 1,07....

THE 75th NAME-LIST OF VARIABLE STARS. ... The 75th Name-List consists of two tables. ... the literature, taken from positional catalogues, including USNO A1.0/A2.0 and GSC, or determined by the authors); the range of variability (sometimes the column Min gives, in parentheses, the amplitude of light variation; the symbol ( means that the star , in minimum light, becomes fainter, than the magnitude indicated); and the system of magnitudes used ( P are photographic ...

... Bad Astronomy . ... Bitesize Astronomy . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... As the boiling water poured over my hands, I had a few milliseconds to ponder over the difference between temperature and heat. ... What we think of as temperature in our daily lives is really a measure of the energy packed into a given amount of material. ... That's because water is denser than air, and is very efficient at transferring the energy it possesses to your body. ...

... Central Astronomical Observatory of the Russian Academy of Sciences at Pulkovo organizes All-Russian annual conference "Solar and Solar-Terrestrial Physics - 2008", which will take place in Pulkovo (Saint-Petersburg) from 7 to 12 July 2008. ... Subjects of the conference include a wide range of problems of solar activity and solar-terrestrial links. ... A joint Russian-Polish seminar on solar-terrestrial physics are also supposed to be held in the frame of the conference. ... For every report) 1. ...

... Общероссийская неделя "Астрономия на тротуаре" - 15-17 апреля . ... Новости астрономии и космонавтики (Модераторы: Karen , recarrion , LeMay ) ? История программы "Спейс Шаттл" . ... 1117 GMT (7:17 a.m. EDT) . ... 1115 GMT (7:15 a.m. EDT) . ... 1109 GMT (7:09 a.m. EDT) . ... 1121 GMT (7:21 a.m. EDT) . ... 1120 GMT (7:20 a.m. EDT) . ... 1123 GMT (7:23 a.m. EDT) . ... 1122 GMT (7:22 a.m. EDT) . ... 1128 GMT (7:28 a.m. EDT) . ... 1129 GMT (7:29 a.m. EDT) . ... 1134 GMT (7:34 a.m. EDT) . ...

НОВОСТИ ФЕДЕРАЦИЯ ЭНЦИКЛОПЕДИЯ ИСТОРИЯ СТАНЦИЯ МИР ENGLISH . ... Soviet manned spaceship "Soyuz-33" was launched from the Baikonur space launch facility on April 10, 1979. It was piloted by the ship's commander Soviet cosmonaut Nikolay Nikolayevich Rukavishnikov and Bulgarian cosmonaut Georgy Ivanov. ... He made his space flight on April 10 - 12, 1979, as research cosmonaut of the space ship "SOYUZ-33" (call sign - "SATURN-2") together with Soviet cosmonaut Nikolay Nikolaevich Rukavishnikov. ...

... Exposure Time Calculator (ETC) . Survey processing . ... VISTA is a 4-m class wide field survey telescope for the southern hemisphere, equipped with a near infrared camera (1.65 degree diameter field of view at VISTA's nominal pixel size) containing 67 million pixels of mean size 0.34 arcsec and available broad band filters at Z,Y,J,H,K s and a narrow band filter at 1.18 micron. A wide field visible camera, if constructed, could also be used on VISTA. ... Tile . ... ESO VISTA Public Surveys . ...

NMW survey overview . Access image archive . ... The New Milky Way survey aims to detect bright (V<13.5) optical transients near the Galactic plane using an automated wide-field (8x6 deg.) system capable of surveying the whole Milky Way area visible from the observing site in one night. ... All images obtained during the transient search survey are available online (please use the image archive access form ). ... Images per field: . ... Images per night: . ... Milky Way imaging time: . ...