Scale-heights of the Galactic disk subsytems with different ages and metallicities . V.Marsakov & Yu. ... It is based on the fact, that all stars cross the disk plane several times during their Galactic orbital period. ... We have used our representative sample of nearby disk F2-G2 stars Marsakov & Shevelev (1995) in which fundamental stellar parameters was determined on the basis of published date on uvby-photometry, proper motion and radial velocities. ... Marsakov V.A., Shevelev Yu.G. Bull. ...

... All the galaxies are divided into 4 groups depending on the environment type; every subsample contains more than 10 galaxies. ... An effect of environments is seen both for the nuclei and for the bulges: if we consider the clusters (Virgo and Ursa Ma jor) and group centers as dense environments and the field and group periphery as sparse environments, then in the dense environments the stellar populations of S0s are in average older by 4­5 Gyr than in the sparse ones. ...

... Dark Matter Ring Modeled around Galaxy Cluster CL0024+17 . ... It is the relatively weak distortions of the many distant faint blue galaxies all over the image, however, that indicates the existence of the dark matter ring. ... A hypothesis for the formation of the huge dark matter ring holds that it is a transient feature formed when galaxy cluster CL0024+17 collided with another cluster of galaxies about one billion years ago, leaving a ring similar to when a rock is thrown in a pond. ...

A STUDY OF THE FRAGMENT DISPERSAL AND TRAJECTORY OF THE SAYH AL UHAYMIR 001 METEORITE SHOWER. ... We obtained hundreds of GPS find locations, analyzed the fragment distribution, and developed a model of the meteorite's trajectory. ... More than 2670 samples weighing more than 450 kg have been collected. ... Increasing fragment mass along track indicated a flight direction of 233o. The fragments' mass distribution was used to model the meteorite trajectory. ...

Bigbang Forum Message . Forums: . ... Discussion Forums | ... The Ekpyrotic [string] Models And The Standard Guth Model. Forum List | ... Post Message | ... Could you outline the differences between the Ekpyrotic [string] models and the standard Guth model? ... www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

lsst.tcc љ 1.2.2-3-g89ecb63 . ... Files . ... python . tcc . base . wrapperTestCase.py . ... 7 љ from tcc.base import AxisStateValDict, RotTypeNameDict . ... 13 љ def setUp (self): . ... 55 љ def checkCmdFail (self, cmdVar, shouldFail=False): . ... 64 љ def checkTrackResult (self, cmdVar, axisCmdState, . ... tcc.base.wrapperTestCase.WrapperTestCase.checkTrackResult . ... Definition: wrapperTestCase.py:70 . ... Definition: wrapperTestCase.py:113 . ... Definition: wrapperTestCase.py:100 . ...

... The Science Operation Department is composed of Astronomers, Telescope Instruments Operators(TIOs) and Data Handling Administrators(DHAs). ... Astronomers have proposed several methods to quantitatively measure the amount of turbulence above the telescope, which the most common ones is Differential Image Motion Monitor (DIMM). In optical testing, the Hartmann test is the common method to test the quality of optical components. ... Hartmann mask consists of 48 lenses. ...

STEP INTO THE BLUE - MEADE INSTRUMENTS PRODUCT GUIDE . ... Telescopes . LX850 Series . ... LX90 Series . MeadeтАЩs LX90 ACF is a favorite of astronomers making the jump to their first, serious, larger aperture telescope. ... Meade's revolutionary LS LightSwitchтДв series of telescopes use advanced technologies to do what no other consumer telescopes have done before: take all the hassle out of using a telescope. ... Coronado Accessories . ... LX90 GPS Module (8" models) . ... LX90 GPS Module. ...

The radius of the event horizon of a black hole with the mass of the Sun would be about 3 kilometers, about the same size as your city, town or village. If the Earth could be compressed into a black hole, the radius of its event horizon would be 1/330,000 of this, because the mass of the Earth is 1/330,000 times the mass of the Sun. ... 30,000,000 . ... 20,000 . ... Black hole event horizon . ... MYTH: All stars collapse to become black holes upon their death. ... MYTH: Black holes are very dense. ...

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... Артикул: A-6164N Цвет: розовый Состав: 80% полиэстер, 20% вискоза Уход за изделием: стирка при 30њС Страна дизайна: Турция Страна производства: Турция Товар сертифицирован. ... Объем: 1.7 л; Мощность: 2200 Вт; Тип нагревательного элемента: закрытая спираль; Материал корпуса: пластик . Цвет: белый . ... Артикул: PL000028AW1 (FRIDA) Цвет: черно-молочный Состав: 94% вискоза, 6% эластан Описание: Идеально стройнящее фигуру платье, комбинированное эластичным итальянским трикотажем и батистом. ...

... The Russian Federation State Program "Physics of Condenced Matter", the "Superconductivity" division , Project code "Generation-2" . ... The multielement josephson structures are known to allow implementation of the unique properties of the Josephson junctions as electromagnetic waves sources with high change rate of generation frequency, working in the millimeter and submillimeter wavelength diapasones. ... Even the optimal type of the junction electrodynamic interconnection isn't chosen. ...