Microsymposium 38, MS083, 2003 (A4 format) MERCURY: LOCAL VARIATIONS OF THE PHOTOMETRIC RELIEF. ... Because of trajectory and pointing angle constraints the planet could be observed from Mariner 10 only over a small range of phase angles between about 75o and 110o. Therefore the photometric investigations are restricted to measuring the distribution of brightness on the Mercurian disk. ... Raw versions of real-time processing pictures FDS 0000984 and FDS 0000986 were used (images 196 and 202). ...

... Tonight's Sky . ... The Magazine . ... Observing . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... Bright planets meet at dusk . ... Astronomy magazine subscribers can read the full article for free. ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter....

Ganymede . ... Ganymede Statistics . ... Hubble Finds Ozone on Jupiter's Moon Ganymede . ... Like Callisto , Ganymede is most likely composed of a rocky core with a water/ice mantle and a crust of rock and ice. ... Ganymede's mantle is most likely composed of ice and silicates, and its crust is probably a thick layer of water ice. ... Ganymede's surface is rich in water ice and Voyager and Galileo images show features which are evidence of geological and tectonic disruption of the surface in the past. ...

... This guide discusses the concept and use of Dynamic HTML, which includes style sheets, content positioning, and downloadable fonts. ... This document discusses each of the three components of Dynamic HTML, describes how to use them, and gives examples of the use of each one. ... Positioning HTML Content contains the following chapters: Chapter 7, "Introduction," introduces the concept of positioning HTML content and discusses the two kinds of syntax you can use to create positioned blocks of content...

CONSTRAINING LONG-TERM AND SPATIAL VARIABILITY OF THE PN LOW ENERGY RESPONSE WITH RXJ1856 (IUSS Pavia; INAF, IASF-Milano) In collaboration with: N. Sartore, S. Mereghetti, A. De Luca, R. Turolla, F. Haberl Andrea Tiengo RX J1856.5-3754 (RXJ1856) Brightest of the "Magnificent Seven", or X-ray Dim Isolated Neutron Stars (XDINSs) (e.g. Turolla 2009 f or a review) The closest known neutron star: d ~120 pc (W alter et al. ... 2011) Why studying RXJ1856 variability? ...

... What are the fluxes of the stars? ... Volume sampled is no longer 4/3 pi r cubed due to curved space-time Want to derive population properties brightness, size, etc - as function of distance (therefore, cosmic time) But - biases in sample Biases NUMBER OF STARS VS MASS Eddington Bias: in astronomy, there are always more little faint things than big bright things. ... Suppose there are 10 stars of mass 0.5 and 100 stars of mass 0.4, and you have a 20 percent error on measuring the mass. ...

... SEARCH ASP SITE: Match ALL words Match ANY word . ... ASP Conference Series . ... Accidental Astrophysics: The Devil's In the Magnitudes, Part II . ... The star second to the Sun in brilliance is Sirius. ... Recall the magnitude system, passed down to us through a hundred generations of sky watchers, as a means of quantifying stellar brightness ("Accidental Astrophysics," May/June, p. 9). ... Yes, it is a magnitude difference, but that difference is due to the distance between us and the star. ...

... X-Ray Structural Analysis . ... The course introduces the basic principles of diffraction analysis of crystal atomic structure and the basic concepts of state-of-the-art atomic crystallography. ... X-ray crystal diffraction. тАЬGeometricalтАЭ theory of diffraction by three-dimensional scattering center grating. ... Systematic X-ray reflection extinction related to Bravais lattice type, screw axis, glide-reflection planes. €аFourier synthesis as a method of crystal atomic structure analysis. ...

... Guider functions . ... Guide Sensor Performance . ... Guide Sensor Sky Coverage/ Star Availability . Guide Star Selection Criteria . ... Guide fiber organization and reach at plug plate . ... Plug plate holes for guide stars are identical to those for science FO . ... FOV for each of 9 guide stars is 7.4 arcsec dia. (0.45 mm FO, Sumitomo IGN-05/10) . ... Selected guide stars must have no neighbor stars within TBD (5 arcsec) radius that have a brightness within TBD (5 mag.) of guide stars . ...

Class 1 Introduction, Background History of Modern Astronomy The Night Sky, Eclipses and the Seasons Kepler's Laws Newtonian Gravity General Relativity Matter and Light Telescopes Class 2 Solar System Characteristics Formation Exosolar Planets Class 3 Stars The Sun Stellar Evolution of Low and High Mass Stars Deaths of Stars Exotic Stars Class 4 Galaxies Galaxy Classification Formation of Galaxies Galactic Evolution ... So far, one planet has been studied by this method. ...

Stellarium 0.12.3 . ... Classes . ... ClassљList . ClassљIndex . ... Skybright Class Reference . Compute the luminance of the sky according to some parameters like sun moon position or time or altitude etc.. ... setDate (int year, int month, float moonPhase) . ... Set the moon and sun zenith angular distance (cosin given) and precompute what can be This function has to be called once before any call to getLuminance() More... љ . ... cos(angular distance between moon and the position) . ...

... My thesis aims to understand the energetics and composition of the jet near its origin, and its interaction with the ICM , focusing on detailed models of the inner structure of a spectacular radio source Hydra A. The key features of my modelling are that 1) I identify the four bright knots in the northern jet of Hydra A as biconical reconfinement shocks, which result when an over-pressured jet starts to come into equilibrium whit the galactic ...

... 11 Yellow-Green (78% transmission): Contrasts well with the red and blue characteristics of surface features on Jupiter and Saturn. ... 82A Light Blue (73% transmission): Useful on the Moon, Mars, Jupiter, and Saturn, this subtle pale blue filter enhances areas of low contrast while avoiding significant reduction of overall image brightness. ... Meade Series 4000 Photo-Visual Color Filters may be ordered individually or in the following sets: . ... Meade Series 4000 Broadband Nebular Filters . ...

... 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. ...

... The versatile and efficient INVERTOSCOPE? combines the highest optical performance with unsurpassed mechanical quality, and is backed by LOMO's unique lifetime warranty, the most comprehensive in the industry. ... A 15X focusing eyepiece with two interchangeable reticles (a 10mm/100div scale and a 10mm x 10mm/400sq grid) for convenient measuring and counting. ... A set of stage inserts and extension plates to accommodate a variety of sample vessels such as Petri dishes, flasks, microtest plates, etc...

... In this context, a very promising new tool is represented by the ultra-long period (ULP) Cepheids (P \geq 80 days), recently identified in star-forming galaxies. ... Abridged] We present the first direct comparison of the distribution of the gas, as traced by the [OI] 6300 AA emission, and the dust, as traced by the 10 micron emission, in the protoplanetary disk around three intermediate-mass stars: HD 101412, HD 135344 B and HD 179218. ... Star formation in young star cluster NGC 1893 . ...

A A 583, A100 ( 2015 ) DOI: 10.1051/0004-6361/201526335 c ESO 2015 Astronomy Astrophysics RadioAstron space VLBI imaging of polarized radio emission in the high-redshift quasar 0642 + 449 at 1.6 GHz A. P. Lobanov1,2 , J. L. GСmez3 , G. Bruni1 , Y. Y. Kovalev4,1 , J. Anderson1,5 , U. Bach1 , A. Kraus1 , J. A. Zensus1 , M. M. Lisakov4 ... RadioAstron space VLBI image of 0642+449 of total (contours) and linearly polarized (color shades) emission, made using the uniform data weighting. ...

... We have compiled the Catalogue of extragalactic supernovae using the GCVS card catalogue. ... Doubtful (?), or rejected (-) SN 8 A1 --- RemFlag [*] The '*' indicates a remark in sn_rem.dat 10- 19 A10 --- Gal Parent galaxy designation 21- 22 I2 h RAh Right Ascension 1950 of Parent galaxy 23- 24 I2 min RAm Right Ascension 1950 (minutes) 25- 28 F4.1 s RAs Right Ascension 1950 (seconds) 29 A1 --- DE- Declination 1950 (sign) 30- 31 I2 deg DEd Declination 1950 of Parent ...

Astronotes Armagh Planetarium's Stellar Blog! ... Armagh Planetarium . ... Stars . ... Space Flight . ... Monthly Sky Notes . ... NGC 6357's inner star forming region glows with the emission of ionized hydrogen gas. Image credit: ESO/VVV Survey/D. Minniti. ... Located around 8000 light years away in the constellation of Scorpius , NGC 6357 (sometimes called the Lobster Nebula ) is a typical stellar nursery, filled with vast clouds of gas and tendrils of dark dust. ... Subscribe to Astronotes . ...

... R-band images obtained at 0.8 arcsec seeing conditions have allowed us to separate foreground star from point-like extragalactic source and estimate their brightness separately. ... To study the nature and properties of the source, we observed it under high spatial resolution. ... CONCLUSION RTT150 optical observations with sub-arcsecond seeing and low resolution spectra confirm the hypothesis of superposition of a radio source onto a `normal' F/G galactic star proposed by [1]. ...