... Three day radio-astronomical forecast of the proton activity of the Sun: The figure shows multiwave radio emission scans - graphs of the distribution of intensity I and circular polarization V across the solar disk, obtained at RATAN-600. ... According to this criterion, for a proton flare to arise, the flux of radio emission must be sufficiently high at short wavelengths (blue color scans) and should increase with time compared to the general intensity. ... More about the solar activity . ...

Masses of asteroids 10 Hygiea and 152 Atala obtained by the dynamical method . ... Masses of asteroids 10 Hygiea and 152 Atala have been obtained by the dynamical method. ... m 152 = 1.34 0.27 (10 -11 Sun )]. ... Very Long Baseline Interferometry (VLBI), Small Solar System Body (SSSB), mass of asteroids 10 Hygiea, mass of asteroids 152 Atala, the dynamical method, perturbing asteroids, the additional acceleration, the Yarkovsky effect, elimination of erroneous observations, optical observations. ...

The 2dF QSO Redshift Survey (2QZ) . ... Before jumping into all the finer details of teh survey, a brief non-astronomer's guide to redshift surveys is available. ... The primary scientific aims of the QSO survey are: (1) to obtain the primordial fluctuation power spectrum out to COBE scales, (2) to determine the rate of QSO clustering evolution in the non-linear and linear regimes and hence obtain new limits on the value of and the bias parameter, (3) to apply a powerful geometric method to measure . ...

Next: Multiple Mother Chirplets: The Up: THE CHIRPLET Previous: Gaussian Chirplet Transform (GCT) . We have been using the frequency shear operator, which we obtained through multiplication by a linear FM chirp. ... The full continuous chirplet transform (CCT) is defined in the same manner as ( 10 ): . ... Again, the law of composition artin of any two chirplet operators (multiplicatively) follows by virtue of the fact that both represent affine coordinate transformations of the TF plane. ...

Astronomy Picture of the Day . Jupiter's Ring Halo . ... Hale-Bopp from Indian Cove . ... M101: The Pinwheel Galaxy . ... Why do many galaxies appear as spirals? ... A Rusty Sunset on Mars . ... The unusual color is partly due to rust: oxidized iron from Martian dust circulating in the Martian atmosphere. ... The collision of this fast moving wall of gas with.. ... A Martian Sunset . ... The above pictures taken by Mars Pathfinder highlight how clouds vary during the end of a Martian day. ...

... Algorithm for selection of defining sources 1. ... Take the common part of the "minimum" sets Make 1. and 2. for both global solution and time series and obtain common set 319 common sources for "global solution sigmas" case Comparison of IAA list, and 380 sources OPA list, set of defining sources ICRF1 and combined set Solution · Given catalogue RA, DE, arbitrary catalogue ra, de. dRAi RAi ra i Algorithm can be improved with additional condition Sum over all deltas less than 1 degree. ...

. Do visit the Old Shanghai . Grant of Chinese Academy of Sciences obtained . Grant of President of Russia obtained . Fulbright grant obtained . Do visit the new section upon the history of Moscow (russian) .