The effect of gravity on clocks was tested to great precision by Vessot etal (1980, PRL, 45 2081) who launched a hydrogen maser straight up at 8.5 km/sec, and watched its frequency change as it coasted up to 10,000 km altitude and then fell back to Earth. ... To separate the Doppler shift from the gravitational effect, a transponder was used: the ground station transmitted pulses (blue) at a fixed rate, which were then echoed by the rocket (green) and detected on the ground. ...

Organisateurs: Michel Balazard (CNRS, Laboratoire Poncelet) , Michael Tsfasman (CNRS, Laboratoire Poncelet, Institut des Probl mes de Transmission de l'Information) , Alexey Zykin (Laboratoire Poncelet, Haute Ecole d'Economie) . ... Informations g n rales . ... We show that when averaging over $q$ in certain ranges, specific values of $a$ give rise to greater or smaller amounts of primes in the progressions $a \bmod q$, depending on the arithmetic properties of $a$. Laboratoire Poncelet . ...

... the time of observation . ... Observing the Changing Position of the Sun To Establish Cardinal Directions . ... Observations of the Sun's apparent movement across the sky and its pattern of rising and setting in the east and west horizon helped to establish the cardinal directions. ... The final stage of the Sun's return was marked by the observation that the Sun had reached its highest altitude when the full width of your mitted hand could fill the gap between the Sun and the horizon. ...

... 2000 March 12 . 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 over the past few years have been interpreted as indicating that we live in a previously unexpected universe . ... About APOD | ...

... These are ``quirks'' rather than ``bugs''. Below is a list of quirks. When loading a file and ``Reset Intensity Upon File Load'' is disabled, the intensity range of the previous image will be used. ... When moving between two images (such as when blinking, or when loading a new image), the display system attempts to retain the old image parameters (i.e. zoom box). What is retained are the corners of the zoom box measured in image pixel co-ordinates, not world co-ordinates. ...

The Solar spots - are the dark formations on the Sun's disk. ... The greatest observed spot is 100 thousand kilomiters. The spots are the places of the magnetic fields' getting out to the solar atmosphere. ... That's why they look so dark . ... The Solar convection zone is the layer with the thickness of 150 - 200 thousand kilomiters, situated under the photosphere; the substance of this layer being in convectional movement transformes the energy from inside the Sun's to its surface. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Meteors and Meteorites . ... Monthly Sky Notes . ... November . ... Observers can expect around 10 meteors an hour on the night of the peak, although every 33 years the Leonids experience a phase of increased activity as their parent comet passes the Earth once again. ... Around€а 14 November, the€а faint and difficult to see Andromedids will be gracing the nightтАЩs sky although this may be in the range of about 3 meteors an hour. ...

... Bojan Nikolic web pages (r. 329) . ALMA . ... LibAIR is the atmospheric inference library that is the main core of the algorithms for phase correction of ALMA data using water vapour radiometers that we are developing in Cambridge. ... The library and algorithms are documented in the series of memo?s which are being posted at page on inference of coefficients for use in phase correction. ... ALMA WVR phase correction algorithms and software . ... Introduction to phase correction for ALMA . ...

Тема : Хвостатые гостьи V (информация для наблюдения комет) .. Показать сообщение отдельно . ... Хвостатые гостьи .. ... после того, как ISON приплыл мимо нас, земля находится на орбитальной траектории, которая пройдет через след частицы кометы (тот, который ISON оставил позади, когда это приближалось к солнцу и это случайно встретит или вокруг 12 января - 15, 2014 . ... лучшее время наблюдения 22:00 LDT (Northern hemisphere 45њ North) .. - радиант расположен вблизи Al'dzhabkhakh (30-Eta Leonis, ? ...

Statistics of sunspot activity . The sunspot indices . ... Visual indices of solar activity . ... n - number of spot groups . A - Waldmeier class of unipolar spot groups without penumbra . B - class of bipolar spot groups without penumbra . C - class of bipolar spot groups with one penumbra pole . D - class of small bipolar spot groups with two penumbra poles . E - class of middle bipolar spot groups with two penumbra poles . ... H - class of unipolar penumbrated spot groups . ...

Next: The Model Up: No Title Previous: Radiopulsars as Sources of . In this section, we study the evolution of stellar populations on a time-scale of 10 Myr for a starburst љ occurring under conditions similar to those in the Galactic Center (see Lipunov et al. (1995d)[ 126 ]). We estimate the expected number of X-ray transient љ sources (NS + MS star), super accreting BH, and BH + supergiant binaries, all as functions of time elapsed after the burst. ...

... Research objects and scientific purposes . Space scientific program includes development and launch of two supersmall spacecrafts "Universitetskiy" and "Kompas-2" intended for monitoring of radiation conditions near the Earth. ... All the studies conducted in the near-Earth space are characterised by strong radiation fields. ... The circular polar orbits, which cover all the near-Earth space, are the most favorable for comprehensive studies of the radiation conditions near the Earth. ...

... From the peculiar shape of the light curve in the visible spectral region (a long phase interval of light constancy was observed by Hensberge et al. in 1981 ), HD 56022 had been expected to show unambiguously the nonequatorial symmetry of its surface brightness distribution. However, analysis of the light curve has yielded a possible equatorial position of a spot. ... A solution seems only possible, if the light constancy over the long phase interval in the visible is not observed in the UV. ...

... Other Planned Activities Include Solar Observing Astrophotography Presentations and CCD Demo's Field Trip to AAAP Observatory at Jenny Jump Workshop: Learning to Use Your New Telescope Plus Swimming (life guards provided), Fishing, Volleyball, Basketball, Hiking, Game room Kayaking/canoeing (bring your own) on two lakes and nearby Pequest and Paulins Kill Rivers Registration Fees Camping and RV -- $35.00 per person ($45 after June 9) Bunkhouse -- $45.00 per ...

DISCLAIMER: The larger the aperture, the more light a telescope will gather and the fainter the object you can see. Here is a range of magnitudes you might expect to see. Given excellent sky conditions and good optics, a well trained eye can sometimes add up to 0.8 magnitude to these values. Limiting Magnitude depends on much more than the instruments aperture. ... One formula is for aperture in inches the other is for aperture in millimeters. ... Aperture (inches) . ... 15.2 . ...

This page is devoted to information on supernova 1999ee and 1999ex in IC 5179 Basic information on this SN, including the last reported brightness, on this Supernova can be found on the main supernova page. Information on the original web pages for many of these images can be found on the Supernova links web page. ... Use this 1999ee VSNet data query and this 1999ex VSNet data query to see what information has been reported so far. ... vsnet-alert 3714 ] SNe 1999ex and 1999ee in IC 5179 . ...

... N. Kardashev and M. Popov informed the participants on the current IOC results. ... Kovalev). ... Agenda of the RadioAstron teleconference November 16, 2011 Corrections to the Agenda 1 2 3 4 5 6 IOC status and results Single Dish observation with RA VLBA observations to find best fringe search candidates Fringe search plan Early science program plan Tracking stations outside Russia N.Kardashev N. Kardashev / M.Popov V. Kostenko E.Fomalont M.Popov Y.Y. Kovalev / M.Popov /A.Alakoz ...

Next: Future Work Up: CCD Scientific Performance Previous: Modes of Operation . ... However, the first experiments with Co-60 irradiation showed loss of charge transfer performance at doses of 10krads [Lumb and Holland 1988b]. ... These studies showed that the charge transfer degradation was a more severe problem than conventional integrated circuit damage mechanisms. ... Another manifestation of radiation damage is that of dark current spike generation. ...

... Phys. (U.S.S.R. ) 42, 1416-1418 (May, 1962) A series of size effects , which are determined by the relationships between the size of electron orbits and the size of a metallic sample, can be observed when a sample having a long fre e path is placed in a constant magnetic field. ... When the field is increased the radius of the electron orbit decreases, and the numbe r of return s of the electron throug h the skin layer durin g the fre e path time increases. ... The sample had a thickness of 0.54 mm ...

... The Galactic low-mass X-ray binary GS 2023+338 was discovered during the burst on May 22, 1989 with the Japanise satellite Ginga (aka Galaxy). The flux reached 17 crabs (this unit of flux measurement is an bright X-ray source, Crab Nebula) at 10-35 keV. ... No other radio telescope worldwide carried out multi-frequency measurements. ... Upon 14 days the radio flux fell below the detection level at the RATAN-600 in relation to the decrease of the X-ray flux. ...