The Earth. ... The middle raiding of the Earth is 6371,032 km, the pole 6356,777 km equatorial - 6378,160 km. The Earth surface area is 510,2 mln km^2, 70,8% of which is the World ocean. ... According to the modern cosmogonical views the Earth was formed 4,6 - 4,7 billions years ago from the protoplanet cloud captured by the Sun. ... The Earth is conditionally divided into 3 parts: a bark a cloak and a core (in the centre). The external layer - the bark is 35 km thick. ... Above the Earth. ...

... Observing . ... Solar Observing . ... April 3 (SUN) - Solar Observing, Central Park , Manhattan . ... APRIL'S SKY . ... Lecture Series at the American Museum of Natural History The Amateur Astronomers Association is proud to present an astronomy lecture series from October through May each year for our members and the .. ... The€аAmateur Astronomers Association of New York€аwas organized in 1927 to promote the study of Astronomy, emphasizing its cultural and inspirational value. ...

... NEdit scrolls too fast when I extend a selection by dragging the mouse outside of the window. ... I appreciate it, and I think it's kind of neat to have a "bleeding edge" version of NEdit around to try out new features. ... A mini-FAQ is also available. ... If NEdit automatically transferred the selection to the Find or Replace dialog, it would either have to steal the selection, or users would have to click or drag the mouse over the text to delete it before they could type anything different. ...

... There are several explanations for these X--ray quiet PMS stars. To examine the explanations, it is proper to divide the PMS stars into three groups: those bluer than R - I = 0.7, those redder than the X--ray sources (R - I > 1.25) and those with colors similar to the X--ray sources. ... A total of 26 of the non--X--ray detected PMS candidates had spectra taken. ... Between V=14 and V=16, I find 25 stars which are X--ray sources and estimate 19 non--X--ray PMS stars. ...

Go directly to the moons of: . Mercury Venus Mars Jupiter Saturn Uranus Neptune Pluto . MARS . Pronunciation . Earth's Moon . ... Aeolis . ... Aestuum . ... Aeria . ... A-muh-ZAHN-is . ...

Program: ROTMOD Purpose: This program calculates the rotation curve for a truncated exponential disk (Casertano, M.N.R.A.S., vol. 203, p735-p747, 1983), or for any other user supplied density law. ... USER= DISK radial surface density distribution supplied by the user [Y], or a truncated exponential surface density distribution. In case the user wants to supply his own density distribution, the following two keywords will be asked: UNITS= Enter units of radius and surface density [KPC,MSUN/PC**2]. ...

... A rough estimation is that in the United States there is one planetarium per 100,000 population, ranging in size from the Hayden Planetarium's 20-meter dome seating 430 people, to three-meter inflatable portable domes where children sit on the floor. ... Together dblo associates make a huge impact in the architecture, interior design and development arena in London. ... With the holidays around the corner what better way to spoil your family than with your very own private home cinema. ...

Lunar Libration . Articles | ... Actually, a slight rocking motion, called libration,* makes about 59% of the Moon's surface visible from our planet Earth -- though only 50% at any one time. ... Add to that, the approximate 1.5 degree tilt of the Moon's equator to the ecliptic, and you have the inclination of the Moon's equator to the plane of its orbit around Earth at some 6.5 degrees (5 + 1.5 = 6.5). ... Re-published on Astronomy Net with permission of the author. ... www.astronomy.net . ...

... S.P. KOROLEV ROCKET AND SPACE CORPORATION ENERGIA . ... OAO RSC "Energia" . ... News . ... S.P. Korolev RSC Energia is the prime manned space flight organization in the Russian rocket and space industry, responsible for the development of the ISS Russian Segment, its integration into the Space Station and its operation, including development and operation of its principal modules (Zvezda, Pirs, Poisk, Rassvet, etc.), manufacturing, launch and operation of Soyuz TMA and Progress M spacecraft. ...

... SUNSPOTS: The surface of the Sun, called the photosphere, is at a temperature of 5800 degrees Kelvin. Sunspots are cooler features (3800 degrees Kelvin) wandering across the disk of the Sun that have been observed since ancient times. ... Solar activity is directly related to the frequency of sunspots. ... ROTATION: The sun does not rotate as a rigid body. ... The next task is to download a complete time series of images that illustrate how your sunspot is moving due to the sun's rotation. ...

... Space flight . ... Space Hotel . ... The program of deployment of small orbital station (SOS) consisting of a family of spacecrafts and module-spacecrafts represents a consecutive realization of flight scenarios with consecutive building up of functions. ... Scenario 1 - the regular and revised spacecrafts of class "Soyuz" - TMSC and MNMSC (MNMSC-cargo, MNMSC-MR) are used, pls. see fig fig.8 . ... The terms of transition to this scenario are determined by terms of readiness of one or another module....

History of an outer space exploration . ... The first space rockets . ... In space where there is no air, the engine which is not using air, i.e. the rocket installation is necessary for a flight vehicle. ... The Tsiolkovsky has understood, that firm kinds of fuel are not suit for space flights and has offered to use rocket engines on liquid fuel. ... Tsiolkovsky made a great contribution to the theory of rocket flight. ... From a satellite of the Earth before lunar landing . ...

... Astrophysics Group . ... COAST . COAST Astronomical Results . Surface Imaging of Betelgeuse . ... Betelgeuse is a nearby red supergiant star, about 500 times larger than the Sun. ... Each image was taken through a different colour filter. From left to right, the images show how Betelgeuse appears in red (a wavelength of 700 nanometres), very near-infrared (905 nm), and near-infrared (1290 nm) light. To show this, we have coloured the images different shades of orange and red. 700 nm . ...

... Laboratory and theoretical modelling of the UV bump on the interstellar extinction curve is a very popular topic in dusty investigations. ... feature is illustrated by Fig. 10 where the profiles were calculated using the model of graphite spheres. Figure 10: Normalized extinction efficiencies for graphite spheres. ... The lower panel shows the summary extinction of two graphite spheres with radii and (from upper panel) taken in equal proportions. ...

Title : Star City Filename : Starcity.wad; Starcity.zip Author : Roger Ritenour Emale Address : ritenour@mail.comet.net Story Line : The starship Pleiades is yours and you have freed the station Mir from the aliens. ... Description : Single level with lots of new graphics. ... Starcity will run under all versions of Doom2. ... Combat : This level features urban combat at night. ... Additional Credits : Doug Ryerson, I borrowed a few of his textures from his ANTARES.WAD. ...

... Pre-university education . ... Samara region . SSAU History . SSAU roadmap . ... Scientists of Samara University (joined SSAU and SSU) began to develop a unified manoeuvring unit for CubeSat-type nanosatellites for the first time in Russia. ... During one of his latest visits to SSAU he proposed to extend capability of the nanosatellites created in Samara University by making a manoeuvring unit and allocated funding to begin work on this topic. ... Nanosatellites of Samara University . ...

. Fig. The SOHO/EIT 171 image (a) illustrating a pronounced transequatorial inverted V-shaped chain 1-2-3-4 which appears to outline the large soft X-ray CH observed with the Yohkoh/SXT (b) on March 1-2, 1999. The BBSO H-alpha (c) and MLSO/HAO He I 10830 (d) heliograms are shown to demonstrate relation of this and some other EUV chains to other large-scale structures such as H-alpha filaments and He I 10830 features. Back to paper .

To Do List ========== November 10, 2007 =============== Progress in base code not yet on this site will appear in the next beta version released here. ... Features in development for the next stable release include TDI with absolute timing Binning and subarea readout Autoguiding with the tracking control and adaptive optics features XML based server/client for remote use Command line version Browser version Connection to XmTel and XEphem for coordinate information in FITS headers ...

... The HH flow associated with young stellar object HL Tau has an exciting history and even until now the origin of some its features is not clear yet. ... Knotty structures of Herbig-Haro jets are common phenomena and knowing the origin of such structures is essential for understanding the processes of jet formation. ... In the flow detected compact knots with high (-150 km/s) and bow shape structures in front of those, with low radial velocities (-50 km/s). ...

... The vast quantities of data produced by modern radio telescopes have outstripped conventional visualization techniques available to astronomers. ... While visualization techniques in other areas find some application in astronomy, problems peculiar to the field require new techniques, such as methods for identifying three-dimensional regions. ... By presenting data three dimensionally, the astronomer may identify structure in the data which is not obvious when using conventional tools. ...