... The width of hydrogen lines is known to depend on the pressure in the photosphere, and then on the luminosity and effective temperature of the star. We have studied this dependence using the spectra of normal B stars from the databases by Jacoby et al., ... The resolution of Jacoby spectra (4.5А) coincides with the resolution of our BTA/UAGS spectra (4.4A). ... Dependence of full width FWZI of hydrogen lines on star spectral type and luminosity class. ...

AMATEUR ASTRONOMERS ASSOCIATION Class Registration Form Dear AAA, Please enroll me in your fall series of six weekly classes on The Solar System starting November 2, 2011. o NAME: I am an AAA member. Enclosed is my check for $45. EMAIL/PHONE o NAME: ADDRESS: CITY: TELEPHONE I am not an AAA member. ...

... Bad Astronomy . ... I think I will break from my usual format of Bad Astronomy/ Good Astronomy by saying that the way we define seasons currently is not strictly bad, but I feel (in my opinion!) that it could be better. The definition of when the seasons begin is at the moment of solstice or equinox; that is, winter (in the north) starts on December 22 nd and summer starts on June 22 nd . ... Now imagine breaking up the Sun's 46 degree up-and-down yearly swing into 1 day intervals. ...

start navigation -- style type= text/css ul { list-style-type: disk } /style p class = navigation nbsp; /p ul class = mainnav li class = mainnav a href = http :// www.cfa.harvard.edu /about/science.html class = leftnav All Science Groups /a /li li class = mainnav a ...

In the first part of this talk, I will give a very short survey of the theory of zeta functions associated to polynomials of several variables and its applications in Number theory, Arithmetic geometry, etc.. In the second part of this talk, I will give a new method which allows studying analytical properties of zeta functions associated to a class of arithmetical functions mixing additive and multiplicative data. I will also give two applications. ...

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Kent, Great Britain . ... school. ... We go to Derwent Lodge School, private . school for girls. ... We go to Derwent Lodge, Sommerhill a private school ( where our parents pay). ... We have to get to school by 8:30 and school ends at 4:30, Yippee at last; . ... Our school is called Derwent Lodge; it is in a group of schools called . ... Our school is called The Schools at . ... Our names are Alex and Oona we go to a school called Derwent Lodge. ... Hello, we go to Derwent Lodge School for girls. ...

... Educational programs (English) . ... Pre-university education . ... SSAU History . SSAU roadmap . ... Interuniversity Department of Space Research of Samara State Aerospace University named after S. P. Korolev (National Research University) will hold holds the Tenth International Summer Space School Future Space Technologies and Experiments in Space from August 24 to September 6. ... Tags: ssau roadmap international summer space school future space technologies experiments in space nanosatellite . ...

. Two white dwarfs have been discovered on the brink of a merger. In just 900,000 years, material will start to stream from one star to the other (as shown in this artist's conception), beginning the process that may end with a spectacular supernova explosion. Watching these stars fall in will allow astronomers to test Einstein's general theory of relativity as well as the origin of a special class of supernovae. David A. Aguilar (CfA)

... Will the Universe End in a Big Rip . ... Start with the constellation of Orion. Near Orion's belt is a fuzzy area known as the Great Nebula of Orion or M42. ... New stellar systems are forming there in gigantic globs of gas and dust known as Proplyds. ... M42: Wisps of the Orion Nebula . ... Comet NEAT Passes an Erupting Sun . ... Just as the comet swooped inside the orbit of Mercury and developed a long and flowing tail of gas and dust, the Sun emitted a huge Coronal Mass Ejection (CME). ...

Lessons learned from the Thirty Meter Telescope site testing Tony Travouillon Sebastian Els, Angel Otarola, Reed Riddle, Matthias Schoeck, Warren Skidmore TMT.XXX.PRE.05.0XX.DRF01 1 Introduction TMT and its Site testing. Important choice before going on site. ... Considerations during analysis of the data. TMT.XXX.PRE.05.0XX.DRF01 2 Some Background about the TMT Site Testing TMT is a 30m, segmented, RitcheyChretien telescope design. ... ASCA Cloud Cover Analysis So how do we do it in practice? ...

... favourite school! ... Relying on our good willed highly skilled teachers, the school is formed with the spirit of co-operation and joint creativity, the co-operation of classes that create a unique atmosphere of unity. ... The ability to act independently: defend ones rights, interests, show responsibility, to plan and organize ones plans, independently acquire . The ability to work with different types of information and to use it for expanding ones knowledge, . ...

... Recent Topics . ... MAO main . Info . ... Topic started 1 year 8 months ago by yatskiv . ... Last Post by yatskiv . 1 year 8 months ago . ... Topic started 1 year 8 months ago by nvpech . ... Last Post by nvpech . ... Topic started 1 year 8 months ago by info . ... Last Post by info . ... Topic started 1 year 8 months ago by berczik . ... Last Post by berczik . ... Board Categories MAO main - Info - MAO - news - Flame Technical - Technical Support(Forum)(Техподдержка(Форум)) . ...

As usual: it depends! It depends on the operating system of your laptop! And then: I don't know and it's not my task to know, so please don't ask me. ... In the menu "Start" -> "(all) Programs" -> "Accessories" -> "System Tools" -> "System Information" . click on "Components" -> "Network" -> "Adapters" . ... Open a DOS-window by clicking on "Start" -> "Programs" -> "Command Prompt" and enter the command "ipconfig /ALL" . ... Here you can find a more detailed description. ...

... Mass_Ratio ); /* Orbital Decay */ # declare Ttd = clock / Decay_Time; # declare clock_merge = Decay_Time * sqrt ( 1. - pow (( Contact / Init_Sep ),1.5) ) ; # declare t_merge = clock - clock_merge ; /* Semimajor axes */ # declare Orbital_Radius_1 = Initial_OrbSep_1 * pow((1.-pow(Ttd,2)),2./3.); # declare Orbital_Radius_2 = Orbital_Radius_1 / Mass_Ratio; # declare Orbital_Sep = Orbital_Radius_1 + Orbital_Radius_2; /* Periods and phases */ # ...

... The first domestic liquid-propellant rocket engine with afterburning of generated gas in a combustion chamber allowed to achieve a specific impulse of up to 340 kgf s/kg in vacuum when using main components. ... Fuel components: . ... fuel . ... The engine has a more heat-intensive combustion chamber, therefore, RG-1 is used as fuel. When launching heavy-lift spacecraft, synthine can be used in the capacity of fuel without re-designing the engine. ... Official WEB-site of S.P.Korolev RSC Energia . ...

... ISC Kosmotras . ... Dnepr launch record 17 August 2011. ... Following the completion of the launch campaign at Baikonur Cosmodrome, in the course of which European Space Agency s CryoSat-2 satellite was successfully injected into the target orbit on 8 April 2010, ISC Kosmotras has commenced another two launch campaigns: at Yasny launch base and at Baikonur. ... As the launch day draws closer, ISC Kosmotras will keep on publishing information about the progress of the launch campaign at Baikonur. ...

... The HST uses an onboard model of its orbit to perform in real-time various control functions relating to spacecraft operations and observation support. ... New coefficients for the ephemeris are updated every other day, and are archived as FITS keywords for each HST observation data set. Using these coefficients,an observer can perform a variety of calibration and characterization calculations relating to the orbital position and velocity of the telescope. ...

... For Teachers . ... Covering the Earth's magnetism in a high school course on Earth sciences addresses two important problems of the science curriculum. On one hand , the customary sequence allocates to physics just one year (and that as an elective!), not nearly enough to sample all areas of physics. ... The story of Oersted and his unexpected discovery of a link between magnetism and electricity prepares the student for later study of electromagnetism in physics class. ...

... Please, don't use any personal macros and definitions. % stract Pattern %**start of header \long\def\maintitle#1{{\vskip 1em \ begin { center }\section*{#1}\ end { center }\nopagebreak[4]}} \long\def\author#1{{\ begin { center }\normalsize{\bf#1}\ end { center }\vskip-1em \index{#1}}\nopagebreak[4]} \long\def\address#1{{\ begin { center }\small\noindent#1\ end { ... Initial conditions $x_0=x(t_0), \dot{x}_0=\dot{x}(t_0)$ of Equtions (1) are determined by the region of possible motions $R_0.$ ...