... GALAXY: A galaxy is made up of billions or trillions of stars bound together by their own gravity. ... HELIUM (He): The second element in the periodic table, has 2 protons, 2 neutrons, and is a noble gas. ... Helium melts at -272.2 degrees Celsius, and boils at -268.934 degrees Celsius. ... HYDROGEN (H): The first element on the periodic table, is a gas, and has an atomic mass of 1.00794 amu. ... Hydrogen melts at -259.34 degrees Celsius, and freezes at -252.87 degrees Celsius. ...

... 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. ...

As of 1.3, the Apache source directories have been re-organised. This re-organisation is designed to simplify the directory structure, make it easier to add additional modules, and to give module authors a way of specifying compile time options or distribute binary modules. ... The non-module source files have moved from src into src/main . ... Configure . ... For example, say it is called mod_demo.c. The archive for this module should consist of two files, in a suitable directory name. ...

... Окуляр 5 Element Plossl 32mm (2") . ... Поле зрения 60 градусов . Это самый короткофокусный из 2" окуляров серии 5000 - он предназначен для получения невысоких обзорных увеличений. ... Симметричные (Plossl) окуляры серии 5000 - прорыв в области оптического дизайна в сочетании с обычным качеством исполнения от Meade. ... Компактные цифровые фотоаппараты . Зеркальные цифровые фотоаппараты PENTAX . ... Окуляры PENTAX . ... Copyright PENTAR ї2004-2016. (бинокли, цифровые фотоаппараты, телескопы) . ...

This Directory contains mean hour values of geomagnetic field components at observatories in Russia and other repub- lic of Former Soviet Union (FSU). The List of these observatories has indication of Data Years. ... Files are prepared in the DOS format. The Format for mean values follows after this list of the geomagnetic observatories. ... 21-116 24I4 24 4-digit hourly mean values for the day. ... If any of the hourly mean values for the day are missing 9999 will appear as the daily mean. ...

General Forum Message . ... The Jocaxian Nothingness . ... What is left is something that is not the nonexistent. ... That is, JN is the simpler possible physical structure, something like the minimal state of nature. ... Thereby, the Jocaxian Nothingness is the natural candidate for the origin of the our cosmo, since it is the simpler possible state nature could present: a state of such simplicity there would not be the need to explain its existence. ... www.astronomy.net . About Astronomy Net | ...

. Diameter of circular antenna . 576 m . Number of antenna elements . 895 . Size of an element . 11.4 x 2 m . Geometrical area . 15000 m 2 . Effective area of full circle . 3500 m 2 . Wavelength range . 1 - 50 cm . Frequency range . 610 - 30000 MHz . Maximum angular resolution . 2 arcsec . Accuracy of coordinate determination . 1-10 arcsec . Flux density limit . 0.500 mJy . Absolute brightness temperature limit . 0.050 mK . Tracking time (South sector + Flat mirror) . 1-3 h . [RATAN-600 Homepage]

... For given geographical longitude and time zone show the current data and time, Universal data and time, current local star time. ... Accept 10 different data formats (data&time, data with decimal day of month, data with decimal day of year, decimal year, some Julian dates), calculate from any formate to others, show day of week. Current data and time direct insertion function is exists. ... Calculate angular distance between two points at the sky by its equatorial coordinates. ...

... The European HST Archive has been moved to ESA's European Space Astronomy Centre ( ESAC ), Spain, where most of ESA's Space Science Archives are located and operated from. ... The Space Telescope European Coordinating Facility (ST-ECF), jointly operated by ESA and the European Southern Observatory ( ESO ) was, until the end of 2010, the European HST science facility, supporting the European astronomy community in exploiting the research opportunities provided by the Hubble Space Telescope. ...

... Space flight . ... On-line Data . ... a - defines the size of the orbit . ... i - defines the orientation of the orbit with respect to the Earth's equator . defines where the low point, perigee, of the orbit is with respect to the Earth's surface . ... defines where the satellite is within the orbit with respect to perigee . Info / On-line data: General description Position J-Track J-Track 3D Explanation . Info: Industry news On-line Data Company ATLAS news Events We in press Contact . ...

. Russian Version [ MS-Win ] . [ News ] . [ Satellite data ] . [ SMIS ] . [ ] . Cities . Rivers . Fires . Clouds . Sea and lakes . Miscellaneous . Back to SMIS Home Page .

... In laboratory the design and a manufacturing techniques mirror aspherical optics are developed ("fokon", ellipsoid, aspherical mirror).Such optical elements are made of widespread aluminium alloys on the standard equipment without use diamond turning. ... Using: optical blocks of not image optical devices for transitions, collimation, focus (concentration) radiations in a wide spectral range from UV to IR. Focusing and collimation of light; . ... circle aperture/ring aperture; . ... Back Forward . ...

MATSYM - symbolic matrix processor . ... To use the program you will need a MAT file (liked CIR file: "User manual for CIRSYM program") of your system. ... In first string of MAT file enter any text you want to be the title of your system. ... Starting from string 2 (if is not comments - "*") enter the system element name, incident row and column and, optionally, its value. ... To generate a solution, run MATSYM.exe and enter "system_file_name.CIR" or click on the "ENTER" (in "MAT" case). ...

FEATURES OF RSC ENERGIA'S MARTIAN MISSION CONCEPT . ... for the interplanetary . ... Then, using propulsion units, this vehicle is injected into the interplanetary trajectory, and over the next few months the vehicle transits to Mars. ... A special lander separates from the main section of the vehicle to take to the Martian surface the mission crew or a part of the crew. ... Key data on the interplanetary vehicle of the RSC Energia concept . ... Official WEB-site of S.P.Korolev RSC Energia . ...

STEP INTO THE BLUE - MEADE INSTRUMENTS PRODUCT GUIDE . ... Telescopes . ... Meade Series 5000 HD-60 9mm 6-Element Eyepiece (1.25") . ... Meade Series 5000 9mm HD-60 6-Element Eyepiece, #07732 (1.25"). The latest advancement in the Meade Series 5000 eyepiece series offers a large 60 apparent field of view and a flat field of view which is tack sharp right to the edge. ... Meade Series 5000 Pl ssl Eyepieces offer a very wide field-of-view, with pinpoint edge of field sharpness and contrast. ...

... A correlation between metal abundance and orbital elements (the eccentricity and angular momentum) has been found for three semples of disk stars of our Galaxy with abundance derived from detailed analysis. The correlation indicates that metal abundance in the Galaxy kept increasing after the birth of old disk stars and that the Galaxy kept collapsing during the formation of its disk subsystems. ...

It could be that SETI signals have arrived at the Earth, but are lower then the noise level, and our receivers cannot detect them. ... Fig. ... It follows that two zones form around the star with civilization X: "Zone Yes", where its SETI signal can be detected, and "Zone No", where its signals are hidden by noise (Fig. ... In practice, it is more efficient to use a time factor, since the problem of SETI contact does not limit the duration of the signal element and semantic text. ...

The nasa.gov site requires that JavaScripts be enabled in your browser. ... Contact NASA . ... The following are astronauts who are employed at NASA. Astronaut assignments and category definitions (e.g., "active" astronauts, "management" astronauts) are contained in a separate Flight Operations Directorate (FOD) policy letter. Astronaut . ... Acaba, Joseph M. 2004 . ... Aunon, Serena M. 2009 . ... Barratt, Michael R. 2000 . ... Burbank, Daniel C. 1996 . ... Cassada, Josh A. 2013 . ... 1998 . ...

Lunar Base Development Issues, Technology Requirements, and Research Needs Peter Eckart[1] Abstract The development, design, and construction of a lunar base will be an extremely complex technical task. ... Eckart, 1999] Lunar Extra-vehicular Activities (EVAs) & Surface Transportation Systems The definition and development of space suits, portable life support systems (PLSS), and surface transportation systems can draw extensively from experiences gained during the Apollo missions. ...

Crystals of Siberia Solutions for laser systems CRYSTALS of SIBERIA Ltd. ... LBO crystal, SHG Dimensions: 8 mm(W) x 8 mm(H) x 25 mm(L) Cutting angle: Theta: 90 degrees Phi: 11.6 degrees Anti-reflection Coating: DBAR@1064+532 nm both sides Quantity: 1 element Price: $2070 per element Item 2. ...