Springtime in the Solar System . In our case, we can use the tilt theory of the seasons to make a prediction: that any tilted planet will have seasons, and that the strength of these seasons will depend on the amount of the tilt. ... At summer solstice, the north pole points straight at the Sun; the north polar regions have tropical weather, but the Southern Hemisphere is in total darkness. ... With a little trigonometry, you can calculate the angle of the Sun and the intensity of solar heating. ...

... Synchrotron emission of a jet in the strong radial magnetic field of an AGN is analyzed. ... Often observed multi-component structures can be explained by the single jet in the model, if the flow of relativistic particles from the active nucleus varies in time. ... It is concluded that a narrow jet of relativistic particles emitted by the synchrotron mechanism in the strong radial magnetic field of an active galactic nucleus can be a real model for variable extragalactic radio sources. ...

... 8, ``Celestial Mechanics'', 2002 Precision increase for the theory of relative motion of a satellite's pair K. V. Kholshevnikov Astronomical Institute of St.Petersburg State University, and Institute of Applied Astronomy, St.Petersburg, Russia Modern higher--precise theories of motion of special Artificial Earth Satel­ lites (geodetical, navigational) consider all forces which one may describe with at least 30% precision, including so exotical ...

... Science Activities > PhD Thesis Topics offered by ESO Faculty Members > Thesis Topic: Star formation: probing magnetic fields and their spheres of influence . ... Observing with ESO Telescopes . ... ESO-MIDAS . ... ESO Data . ... Magnetic fields play a key role in the early formation of low mass stars, from regulating the initial collapse of the protostar, controlling accretion from large circumstellar disks and their evolution along the early main sequence. ... Return to list of thesis topics . ...

Общий форум . Scientific.ru Все форумы . ... Alex K (@) - 24.03.2004 12:08 . ... x203a; x203a; x203a; в ответ на: It depends Alexei-I . ... Заявка, не поддержанная РФФИ Andrey, 20.03.2004 10:31 . ... Re: Заявка, не поддержанная РФФИ Matigor, 23.03.2004 16:27 . ... Заявка.. Yustas, 22.03.2004 22:27 . ... Re: Заявка, не поддержанная РФФИ Е.Онищенко, 20.03.2004 17:16 . Re: Заявка, не поддержанная РФФИ Андрей, 22.03.2004 14:35 . Re: Заявка, не поддержанная РФФИ Михалыч, 20.03.2004 16:15 . ...

Is the ozone layer recovering ? ... Global Regulation Global Regulation · · · · 1985: Vienna Convention 1987: Montreal Protocol Several amendments and adjustments Quantity for (chemical) ozone depletion of ODS: EESC (Equivalent Effective qu ect Stratospheric Chlorine): Weighting over release and ozone depletion of individual ODS EESC for mid-latitudes http//:www.wmo.ch/web/arep/reports/ozone_2002/q&as.pdf, Seite Q.29 1980 1990 2000 2010 2020 2030 2040 2050 2060 2070 2080 2090 2100 3. ...

... Key words: stars: magnetic fields ­ stars: chemically p eculiar 1 Intro duction On the basis of all the available published magnetic measurements for Ap stars we have found a few relations describing the frequency of o ccurrence of the sp ecific magnetic field intensity for all typ es of chemical p eculiarities (Bychkov et al. 2003a). ... Magnetization of stars in the `strongly'-magnetic group exceeds that in the `weak'-magnetic group typically by a factor of 5­10, on the average. ...

It is a matter of common knowledge that in processes of genesis and evolution of many solar phenomena participate magnetic fields of sunspots. ... As a basis for formation of the database we take data on magnetic fields, collected by set of observatories during many years of observations. ... Section "Magnetic field data" contains data of magnetic field observation for separate sunspots, presented in standard text format (ASCII). ... Description of structure of these files is presented here . ...

... 2Department of Microtechnology and Nanoscience, Chalmers University of Technology, S41296, Gothenburg, Swеden 3Department of Materials Science, Darmstadt University of Technology, 64287 Darmstadt, Germany Here we report on the experimental studies of the dc and rf current transport in hybrid thin film S-N-M-D Mesa HeteroStructures (MHS) of Nb/Au/M/YBa2Cu3O7-( with areas from 10(10 up to 50(50 (m2. ... Phys. Rev. Lett. 99, 017004 (2007) 2. ... Phys. Rev., 76, 064505 (2007). ...

... A diagram of the output register of the PlutoCCD CCD is shown in Figure 5-1 and illustrates the setup clock waveform and DC potentials for the last three pixels of the serial shift register (V f ), before it is collected in the Summing Well (V sw ), transferred to the Last Gate (V otg ), and then sampled by the output MOSFET, when the charge is dumped to the output node using the amplifier with a Voltage Reference (V ref ), Reset Gate (V rg ), and output drain (V dd ). ...

... Jupiter's big moon Ganymede is not only the size of a planet -- it sounds like one too, as heard in audio recordings made from data returned by NASA's Galileo spacecraft released today. ... Characterized by a soaring whistle and hissing static, Ganymede's song reveals that the Solar System's largest moon is also the only one known to possess a planet-like, self-generated magnetic cocoon called a magnetosphere , which shields the moon from the magnetic influence of its giant parent body, Jupiter. ...

... The dependence of velocity ellipsoid parameters for various types stars upon theirage was investigated. ... For metal-rich stars ([Fe/H] -0.1) the shape of velocity ellipsoid becomes more spherical with increasing age of the stellar group and it approaches the equilibrium shape. ... По данным uvby -фотометрии, изохронным возрастам и собственным движениям ~3500 F -звезд диска в окрестности 80 пс от Солнца исследованы зависимости параметров эллипсоидов скоростей различных звезд от возраста. ...

Next: Polarization efficiency: size/shape/orientation effects Up: Optical properties of cosmic Previous: The 2175? feature . To model the interstellar polarization one needs to calculate the forward-transmitted radiation for an ensemble of non-spherical aligned dust grains. ... Let non-polarized stellar radiation passes through a dusty cloud with a homogeneous magnetic field. ... The angle between the line of sight and the magnetic field is ( ). ... where the angle is connected with and ( ). ...

... THE SIMPLEST MODEL. ... 13, Moscow 119992, Russia E-mail: san@sai.msu.ru Abstract: The analysis of the simplest model shows that an asteroid ­ rubble pile evolves, depending on the parameter V2d (where V is the average velocity of fragments and d is the average distance between fragments), either as a conglomerate of "independent mutually gravitating clusters" (when V2d < fm, where f is the gravitational constant and m is the average mass of a fragment) or as a "receding cluster" (when V2d > fm). ...

James @album: Seven @song: Heavens ------------------------------------------------------ I've been sittin' on top of these rocks Watchin' the waters rise Everyone that I have loved has gone floating by I've been praying for the king of the world To come and rescue me from a clan that's lost in dream From a clan that's lost in dream Are you waiting for the heavens ( Heavens ) Are you waiting for the ...

... Bad Astronomy . ... Bitesize Astronomy . ... Mad Science . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Although seen here on Earth, aurorae start at the center of the solar system. ... After about three days those particles get near the Earth and hit the Earth's magnetic field. ... Now these particles are moving very fast, and when they hit the air they slam into air atoms that make up our atmosphere, sometimes knocking loose more electrons. ... 2008 Phil Plait. ...

... A closed surface (i.e. a compact surface without boundary) is homeomorphic to either a sphere with g handles (a connected sum of a sphere with g tori) or to a sphere with g M obius bands attached (a connected sum of a sphere with g copies of RP 2 ). A compact surface with boundary is homeomorphic to a closed surface with a nite number of disks deleted. ... Prove that on the sphere with g handles the maximal number of nonintersecting closed curves not dividing this surface is equal to g. IV.11. ...

... IONOSPHERIC DATA IN THE INTERACTIVE SPIDR SYSTEM . ... The Ionosphere The ionosphere is that part of the upper atmosphere where free electrons occur in sufficient density to have an appreciable influence on the propagation of radio frequency electromagnetic waves. ... These regions may be further divided into several regularly occurring layers, such as F1 or F2. ... E Region: The region between about 95 and 150km above the Earth that marks the height of the regular daytime E layer. ...

On' failures in the NIRSpec MEMS ST-ECF Instrument Science Report NGST 2002-02 The effects of `on' failures in a MEMS array for the NGST NIRSpec Santiago Arribas, Robert Fosbury Peter Jakobsen --1-- ST-ECF Instrument Science Report NGST 2002-02 The effects of `on' failures in a MEMS array for the NGST ... Assuming that the spectrum of a single facet uses 2000 detector pixels, only 0.01% of `on' failures is acceptable (i.e., 400 facets in a 2k в 2K MEMS array). ...

There are 2 separate compressed air systems on site that function independently. These systems can backup each other in case of an emergency. ... System No. 1: This system provides compressed air to: . ... Compressed air is provided by two Kaeser screw compressors in the boiler room. ... Pressure runs at either 109 or 115 psi depending on which compressor is operating. ... However, System No. 2 can only backup System No. 1 when operating on the Kaeser compressor. ...