... Tonight's Sky . ... Astronomy for Kids . ... CERN experiment makes spectroscopic measurement of antihydrogen . ... The ALPHA collaboration at CERN reports an important milestone on the way to measuring the properties of antimatter atoms. ... This measurement shows that it is possible to set up experiments in which the internal properties of antihydrogen atoms can be changed by shining microwaves on them. ... Only registered members of Astronomy.com are allowed to comment on this article. ...

... B. Bertotti, R. Ambrosini, S.W. Asmar, J.P. Brenkle, G. Comoretto, G. Giampieri, L. Iess, A. Messeri, H.D. Wahlquist: "The Gravitational Wave Experiment" , Astronomy and Astrophysics Suppl. ... B. Bertotti, R. Ambrosini, J.W. Armstrong, S.W. Asmar, G. Comoretto, G. Giampieri, L. Iess, Y. Koyama, A. Messeri, A. Vecchio, H.D. Wahlquist: "Search for gravitational wave trains with the spacecraft Ulysses" , Astronomy and Astrophysics, 296 , 13 (1995). ...

... One of the problems of improving the accuracy of G is a precision measurement of the period of eigen oscillations of the torsion balance. ... A new method of high-precision estimation of the period of torsion oscillations has been developed. The dependence of the torsion period value and the error of its estimation on the level of the acting seismic noise has been studied. ... The accuracy of period estimations depends on the level of seismic noise which affects the torsion balance. ...

... The European HST Archive has been moved to ESA's European Space Astronomy Centre ( ESAC ), Spain, where most of ESA's Space Science Archives are located and operated from. ... The Space Telescope European Coordinating Facility (ST-ECF), jointly operated by ESA and the European Southern Observatory ( ESO ) was, until the end of 2010, the European HST science facility, supporting the European astronomy community in exploiting the research opportunities provided by the Hubble Space Telescope. ...

GRAVITATIONAL REDSHIFT EXPERIMENT WITH THE SPACE RADIO TELESCOPE RADIOASTRON Dmitry Litvinov1, Norbert Bartel 2, Alexander Biriukov3, Vladimir Kauts3, Victor Kulagin1, Valentin Rudenko1 1 Sternberg Astronomical Institute, Russia 2 3 York University, Canada Astro Space Center, Russia Journees 2014 , Saint-Petersburg , 22-24 September 2014 GRAVITATIONAL REDSHIFT Einstein, 1911: Pound, Rebka, 1960: laboratory test Journees 2014 , ... 2014, Astron. ...

Next: Extragalactic Gravitational Wave Background Previous: Transparency of the Stochastic . Let the sky be observed with a detector having a pencil beam diagram across. The number of stars per frequency decade that is swept by the detector is a function of celestial coordinates (say, galactic coordinates l , b ): . ... It is clear from the figure that for an all-sky detector the Galaxy becomes transparent above the frequency  Hz. ...

... Archives . ... Diab Jerius follows up on LOESS techniques б with a very nice summary update and finds LOCFIT to be very useful, but there are still questions about how it deals with measurement errors and combining observations from different experiments: . ... LOESS has been succeeded by LOWESS and, finally LOCFIT, which is the 800lb gorilla of local regression fitting. The LOCFIT algorithm uses local regression (i.e. fits over samples of the data) to generate smooth curves. ... Chandra Blog . ...

The technical memorandum: Time and Time Interval Measurement with Application to Computer and Network Performance Evaluation (PostScript) describes a number of techniques for conducting experiments typical of computer network and transmission systems engineering. ... The usual data collected during a performance run of some experiment might include time offsets, time delays, frequency offsets and various error statistics. ...

... Geoforschungszentrum Potsdam, Aussenstelle Observatorium Niemegk, Germany Magnetic and electric fields and plasma waves are generally thought to play a significant role in various processes. ... The wave instruments included hihgly sensitive sensors for measurements of fluctuations of the plasma flow, current density, electric and magnetic fields, spacecraft potential, density and temperature of the plasma and multi-channell frequency analyzers [Klimov et al., ... Magnetic field measurements . ...

... The described algorithm is suitable for measurements of complex images of stars. ... a) the zero-based number of stars in the complex (multicentric) image, . b) set of preliminary coordinates - x i , y i , for all stars, index i is number of a star, . ... i - index of a star in the complex image; . ... These parameters are calculated by a nonlinear method of a least squares.The main output parameters of this algorithm are x i , y i ; where the index i is number of a star in the multicentric image. ...

... S.P. KOROLEV ROCKET AND SPACE CORPORATION ENERGIA . ... OAO RSC "Energia" . ... Company's History . ... History . Brief History of Rocket and Space Technology . ... Flights Chronology . ... Project History . ISS Russian Segment . Steps of ISS Assembly . Spaceflights Chronology . Chronology of Extravehicular Activity . ISS 45/46 . ... Rocket Space Complexes . ... Launches Chronology . ... Automatic Space Systems . ... HISTORY . ... 2015 JSC "S.P. Korolev RSC "Energia" . ...

At Punta Salinas (North-coast, close to EL-Morro (6.2 km West) in Old San Juan), the Puerto Rico Air National Guard (140th Air Defense Squadron) have a frequency hopping radar with 18 channels spread over the frequency range of 1220 - 1400 MHz. ... For the most part, this scheduling has provided minimal interference to observations that could be hampered by this radar. When coordinated with Punta Salinas observations given adequate protection. AN/FPS-117 RADAR used at Punta Salinas PRANG. ...

January 7, 2000 Dr. Eric Torrence, University of Chicago . ... 3:00pm, 240D Willamette Hall . Dr. Torrence will also present the Physics Colloquium on January 6. return to top . ... Dr. Morii will also present the Physics Colloquium on January 24. return to top . ... return to top . ... The ratio of the inclusive jet cross sections at center of mass energies 0.63 TeV and 1.8 TeV is also presented versus scaled jet transverse energy x_T and compared to QCD predictions. 3:00pm, 472 Willamette Hall . ...

... Primordial theory review : Dick Bond . Defects and the CMB review : Andy Albrecht . ... Gravitational wave contribution to CMB anisotropies : V.B. Lukash and E.V. Mikheeva . C_l from cosmic strings : Lloyd Knox . Some aspects of CMB anisotropies induced from topological defects : Mairi Sakellariadou . ... CMB anisotropies from scaling sources : Ruth Durrer . ... SZ observations I : Sarah Church . ... Holes in the microwave sky? ... Detecting cosmic strings in the CMB : James Robinson . ...

Transactions IAU, Volume XXVIB Proc. XXVIth IAU General Assembly, August 2006 K.A. van der Hucht, ed. c 2007 International Astronomical Union DOI: 00.0000/X000000000000000X COMMISSION 31 TIME (TIME) Demetrios Matsaskis Pascale Defraigne Gerard Petit Seigfrido Leschiutta Gerard Petit Mizuhiko Hosokawa Zhai Zao-Cheng PRESIDENT VICE-PRESIDENT PAST PRESIDENT ORGANIZING COMMITTEE PROCEEDINGS BUSINESS SESSION, August 21 2006 1. ... The second part of the session was dedicated to pulsar timing. ...

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. ...

Basics of magnetosphere satellite experiment. Main steps of data processing. Modern conception of Earth magnetosphere. ... Empirical models of the bow shock, magnetopause and neutral current sheet positions. Main principles of construction of empirical magnetospheric magnetic field models. ... Current systems in the Earth magnetosphere. Chapman- Ferraro current. ... Tsyganenko 1996 model and its application to satellite data processing. ... Basics of statistical data analysis. ...

... Research . ... Geophysical Institute of Czech Academy of Science, Prague, Czech . ... plasma analysator . ... Space Research Institute,Berlin, . ... Space Research Center, . Polish Academy of Sciences,Warsaw, . ... particles analyser . measurement of particles 0.05 - 1.0 KeV for 0.1 sec . Space Research Institute,Sofia,Bulgaria . ... Prague University, . Research Institute of Nuclear Physics,Moscow State University;Russia . ...

... For the experimental investigation IRE has installed several radiometers in Oberpfaffenhofen, Germany, having the same frequencies as the Priroda- IKAR radiometers (13, 22.2, 37 and 90 GHz), close to a 19 GHz dual polarisation radiometer and meteorological equipment of DLR (2 raingauges, a distrometer for measurements of the size of rain drops, and sensors for humidity, temperature and pressure). ... N, 17 deg. ... 1000 . ... Table 1: Specifications of ground based radiometers in Oberpfaffenhofen. ...

... INVESTIGATION OF JOINT EFFECT OF TWO . MECHANISMS OF PROBE WAVE ANOMALOUS ATTENUATION . ... As it follows from the title of our paper, I shall speak about two mechanisms of anomalous attenuation, one of the basic effects been observed under ionospheric heating by powerful HF waves. ... The second mechanism of anomalous attenuation is multiple scattering. ... Perhaps, anomalous attenuation been observed at Arecibo will be easier explained by multiple scattering mechanism. ... O-wave only . ...