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... In 1930, Trumpler noticed that linear diameters (LD) of open clusters increase with distance (D) from the Sun. ... Since that time, the interstellar absorption has become one of the best studied factor in astrophysics, and we may hope that current OCL distance scales are free from this LD-D correlation. To verify if this is the case we have chosen several modern OCL distance scales and test them with the same clusters and the same angular diameters that Trumpler had used back in 1930. ...

... Pages with info on individual constellations: . GPS . glonass . ... Global navigation satellite cause interference in the frequency range 1165 - 1300 Mhz. ... satellite . ... The compass (beidou-2) satellite is part of the global navigation satellite system for china. ... The dynamic spectra above shows some leakage near 1383 MHz and 28 seconds that looks like it is associated with the compass satellite transmission. ... The 10 MHz wide rfi seen at 1268.52 is the Chinese compass satellite. ...

... About meteorites . ... Meteorite Encyclopedia . ... About laboratory . ... On the night of September 24-25, in the north of Irkutsk Oblast, local residents saw a brightly glowing space object draw a line across the sky and fall into the taiga. ... But scientists learned of the heavenly visitor only on October 3, when a fax arrived at the Institute of Sun And Earth Physics from Bodaibo. ... The first thing we did was to interview residents of villages located along the meteor's flight path. ...

... Come to Fiske Elementary School from 7:00 to 9:30 PM on Monday, Nov. 3 2003 if you love astronomy, space, or just looking at the moon and stars with your fellow Fiske friends. ... We will arrange briefing discussions and activities in the Fiske Gym and viewing stations in Fiske Field, providing a look at - and through - telescopes trained on objects ranging from the Moon to planets and galaxies. ... ATMoB members will bring telescopes for viewing of the Moon, Mars, and other spectacular sky objects....

. General information . The LOC will organize the ice-breaking evening, conference dinner and excursion program, and tries to cut the expenses. But the additional fees may apply. The actual information will be published.

... Fundamental classes TOPOLOGY-2, FALL 2012 One says that a compact oriented submanifold N M of dimension n realizes a homology class (N ) Hn (M ) where : N M is the tautological embedding and N Hn (N ) is the fundamental class of N chosen according to the orientation. ... Problem 1. (a) Let N CP 2 be a smooth curve of degree n. Prove that N is orientable and realizes a class n Z = H2 (CP 2 ). (b) Prove a similar statement for RP 2 . ... Which of them realize classes in H (RP n ; Z)? ... Problem 3. ...

... SMIS ] . ... Aqua, 22.04.2004, 04:15 GMT . ... Space Research Institute, Moscow ( http://smis.iki.rssi.ru/ ) . NOAA 12, 3.04.2004, 13:20 GMT . ... NOAA 16 20/08/2003 3:09 GMT . ... NOAA 16 4/04/03 10:41 GMT . ... NOAA 15 1999.12.14 09:32 MSK . ... NOAA 15 . ... NOAA 14 22/01/1999 9:13 GMT . ... Pseudo-colour image. ... Red - channel 5, Green - channel 2, Blue -channel 1 . ... True-color composition from NOAA 12 and NOAA 14 AVHRR Channel 3 data using images acquired at different times of a day. ...

... Equations are obtained for the plane relative motion of the system on the taut thread (on the assumption that the centre of mass of the system moves along the Keplerian elliptic orbit). ... The torques of gravitational forces, aerodynamic pressure, aerodynamic friction and the aerogradient effect are taken into account. ... First, the problem is investigated in case of taut thread and Keplerian elliptic motion of the centre of mass. ... In a general case the free motion is bound to become connected....

... (degrees) b2 galactic latitude (degrees) sgl supergalactic longitude (degrees) sgb supergalactic latitude (degrees) pgc PGC name *** alphabetical ** ident1 1st name (NGC,IC,UGC,ESO...) *** alphabetical ** pa position angle (N- E) in degrees typ morphological type (e.g. 'E','Sab','SBa','SO') *** alphabetical ** ring 'R' for Ring galaxies, otherwise ' ' (blank) *** alphabetical ** multiple 'M' for multiple galaxies, otherwise ' ' (blank) *** ...

Crater Gassendi . ... I made this drawing was made on the 26th of november 2001. If you compare this one with the previous drawing of Gassendi (below) the differences are clear. ... This drawing was made on the 28th of september 2001. After nearly a full month without observations I had a one hour gap between the thicker clouds. ... This drawing was made on the 29th of august 2001. ... This drawing was made on the 27th of august 2001. ... This drawing was made on the 25th of august 2001. ...

RTT150 . ... This search system is designed for generating the necessary information on series of pointings (observations of each source consist of sets of exposures with different filters and sometimes with different exposure times) for observed sources. Search results appear at the separate page as a table with the following data: . DATE - real (not evening!) observations date (in YYYY-MM-DD format); . ... Bin - minimal CCD binning mode (may vary during the observations); . ...

... Meade Instruments Corporation . ... Autostar Computer Controllers . 497 Autostar . ... One of the most important advances in telescope control in the past 25 years, the Meade #497 Autostar Computer Controller turns the ETX into an automatic celestial object locating system. ... The #497 Autostar Computer Controller plugs into the control panel of ETX-90EC, ETX-105EC, and ETX-125EC telescopes and enables automatic location of more than 30,000 celestial objects. ... about meade | ... Meade 4M | ...

Russian Space Science Internet (RSSI) is a successful result of RSSI Project. ... space oriented organizations; . ... RSSI offers for its members : . ... videoconferences via MBONE Internet protocol (there are 2 tunnels available now through the general IP network: one to NASA Internet, and another to Moscow State University); . ... It is designed so that all organizations connected to the RSSI gain access to the resources of Russian computer networks as well as world wide Internet. ... nic@rssi.ru ...

... Courtesy of NASA/ESA Observation data (J2000 epoch) Constellation Right ascension Declination Redshift Distance Type Serpens Caput 15h 17m 14.4s[] +21° 35 08[] 12,740±50 km/s[][1] 600±30 Mly (183±8 Mpc)[1] SA0(r) [citation needed ] [a] Apparent dimensions (V) 0.28 в 0.28[] Apparent magnitude (V) 16.0[] Notable features Ring galaxy Other designations PGC 54559,[] PRC D-51[] See also: Galaxy, List of galaxies Hoag's Object is a non-typical galaxy of the type known as a ring galaxy. ...

It is shown that the Earth is a natural collector of extraterrestial nonsterile artefacts that could impact our planet. Artefacts from 1.2*10 6 nearby stars could have reached the Earth over its history, and could be agents for spontaneous interstellar panspermia, even if alien civilizations pollute space only at the current terrestrial rate. ... There could be alien artefacts on the Earth even in the absence of alien expeditions to the Earth, or of interstellar missions at all. ...

... In brief: the frequency-dependent radiative transfer equation is solved for a dust under assumption of spherically-symmetric geometry for its distribution taking into account particle size distribution and quantum heating effects for the very small dust particles. ... Table: Model parameters for IRAS04296+3429. ... parameter . ... hot dust shell) . ... The best fit to the spectral energy distribution of IRAS04296 is shown by heavy solid line (see Table2 for details concerning parameters of the model...

... IAU planet classification Observing with a Telescope Large Scale Structure The observables: Local Group (size 1 Mpc) Virgo cluster (size 2+ Mpc) Virgo supercluster (size ~33 Mpc) Voids (size ~ 10-150 Mpc), Walls and sheets, aka filaments (size ~ 50-80+ Mpc) 1 parsec The nearest star is 1.2 parsecs away (Proxima Centuri). ... Virgo supercluster Voids, Sheets Filaments The Virgo Cluster is a cluster of galaxies at a distance of about 18.0 Mpc away in the constellation Virgo. ...

To appear in "Fourth Workshop on Robotic Autonomous Observatories (2015)"RevMexAA(SC) MASSIVE PHOTOMETRY OF LOW-ALTITUDE ARTIFICIAL SATELLITES ON MINI-MEGATORTORA S. Karpov, 1, 3 E. Katkova,2 G. Beskin, 1, 3 A. Biryukov3,4 S. Bondar,2 E. Davydov5 E. Ivanov,2 A. Perkov,2 V. Sasyuk3 RESUMEN Favor de prop orcionar un resumen en espanol. ... The nine-channel Mini-MegaTORTORA (MMT-9) optical widefield monitoring system with high temporal resolution system is in operation since June 2014. ...

. F IGURE . 4. Metallicity is plotted against galactocentric distance (a) and distance from the Galactic plane (b) for the globular clusters of thick disk (triangles) and old halo (circles). The slopes of linear regressions gives the values of radial and vertical metallicity gradients, corresponding. The points denoted with squares have been excluded from regressions according to the 3 rule. discussion in the text | previous figure | next figure .