A spherical meteorite of radius 3m enters the Earth's atmosphere at an altitude of 100km and a speed (relative to the Earth) of 30 km/s. The atmosphere slows it down, so when it hits the Earth's surface it is travelling at only 1 km/s. If half of the heat generated as it passes through the atmosphere is absorbed by the meteorite, how hot will it be when it is about to land? ... However, the number I calculated (500,000 K) is correct, as is the discussion that follows it. ...

grdvolume - Calculating volume under a surface within a contour grdvolume grdfile [ -C cval or -C low / high / delta ] [ -L base ] [ -R west / east / south / north [ r ] ] [ -S [ k ] ] [ -T ] [ -V [ l ] ] [ -Z fact [/ delta ] ] grdvolume reads a 2-D binary grd file and calculates the volume contained between the surface and the plane specified by the given contour (or zero if not given). ... Alternatively, search using all contours from low to high in steps of delta . ... Default is no scaling]. ...

Astronomy Picture of the Day . The Sun Spews X-rays . ... Credit Copyright: Yohkoh Soft X-ray Telescope , ISAS , Japan Explanation: Our Sun is really very hot. ... X-rays are usually emitted from objects having a temperature in the millions of degrees, not the mere thousands of degrees of the Sun's surface. The above X-ray picture shows the Sun one particularly active day in August of 1992. ... NASA Web Site Statements, Warnings, and Disclaimers . ... Publications with keywords: Sun . ...

The language of topology. ... The objects of topology: topological and metric spaces, simplectic and cell spaces, manifolds. ... Classification of surfaces (geometric proof for triangulated surfaces). Homotopy and homotopy equivalence, the homotopy groups ? ... Vector fields on surfaces. The Poincar? index theorem. ... Curves in the plane, degree of a point with respect to a curve, Whitney index (winding number) of a curve, classification of immersions, the "fundamental theorem of algebra". ...

... This gives us another handle on how distant the stars are. ... Stars differ not only in distance, but also in apparent brightness. ... Ranking stars by brightness . ... The brightness of the star decreases as the square of the distance. ... At what distance would a 100-watt light bulb have the same brightness as the brighter stars? ... So if the distance of the 100-watt light bulb was 5 kilometers, the distance of the brighter stars would be 10,000,000,000,000 kilometers, or about a light-year. ...

It is easy to incorporate information from an instrument or the telescope into your scripts. ... mess with the getKeyVar statements because getKeyVar returns None in debug mode, making the commands run, which is perfect. import TUI .TCC.TCCModel import TUI .Inst. DIS .DISModel from TUI .Inst. DIS .StatusConfigInputWdg import StatusConfigInputWdg InstName = DIS class ScriptClass(object): Simple script to configure DIS . def __init__(self, sr): Display ...

Журнал ПОВЕРХНОСТЬ публикует оригинальные статьи и обзоры по наиболее актуальным проблемам изучения поверхностных явлений. ... Редакция журнала 'Поверхность. ... Англоязычная версия журнала Journal of Surface Investigation . X-Ray, Synchrotron and Neutron Techniques выходит 6 раз в год . The Journal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques ( Poverkhnost '. ... X-ray, Synchrotron and Neutron Techniques is abstracted and/or indexed in (Impact Factor 0.359): . ...

... Schedule IKI RAN Data Acquisition, Processing and Dissemination Center . SRC "Planeta" Data Acquisition, Processing and Dissemination Center . Sea Surface Temperature Adriatic Sea . Baltic Sea . Barents Sea . Black Sea . ... Composite Image of Cloudiness Russia . ... Regional Archive (only cloudless data) . ... Operative Regional Archive (all data for last 3 days) . ... NOAA Data on other Servers (about Russia) . For more information send a mail to: info@sputnik.infospace.ru . ...

... UA SCIENTIST & TEAM DISCOVER SURFACE FEATURES COVER TITAN (Science contacts: Peter H. Smith, (602) 621-2725; Mark Lemmon, (602) 621-1485; UA Lunar and Planetary Laboratory) . Scientists for the first time have made images of the surface of Saturn 's giant, haze-shrouded moon, Titan. ... About three weeks before Cassini's first flyby of Titan, the spacecraft is to release the European Space Agency's Huygens Probe to parachute to Titan's surface. ... Upper left: hemisphere facing Saturn. ...

SAI VO . ... SAI CAS . ... Web Services . Catalog Access Services . ... SAI VO Wiki . ... Program Access . SAI CAS Wiki . SAI Web Services . ... DSS Mirror . ... We provide an implementation of IVOA standard Simple Image Access Protocol interface to our DSS mirror. Service metadata is available here . Currently, we provide the atlas service only, which returns the list of original DSS images intersecting the requested sky area. ... SAI MSU | ...

... AstroAsciiData is a Python module to handle ASCII tables. ... The idea to develop this Python module emerged from the fact that ASCII tables continue to be one of the most popular and widely used data exchange formats in astronomy and probably science in general. ... To load this ASCII table, go into Python, load the AstroAsciiData module and read in the table with: . ... demo = asciidata.open('webexa.txt') . ... Users who only want to work with ASCII tables neeed no further python modules. ...

. The figure shows an image of Mercury's surface (left: obtained using publicly available mosaic of Mercury from the MESSENGER spacecraft and a color-coded view of the global crater areal density (right), obtained by measuring craters greater than 15 miles (25 kilometers). The region within the white line corresponds to the heavily cratered terrains analyzed to calculate the age of the oldest surfaces on Mercury. // Johns Hopkins APL

Stellarium 0.12.3 . ... Classes . ... Scripting . ... Scripting Engine . ... Script Console . ... Since version 0.10.1, Stellarium includes a scripting feature based on the Qt Scripting Engine . ... Prior to version 0.10.0, Stellarium used a different scripting engine called StratoScript . ... Prior to version 0.10.0, Stellarium had a simple scripting engine, known as StratoScript . ... This script prints "Hello Universe" in the Script Console output window. core.debug( "Hello Universe" ); . ...

... According to the most popular cosmological paradigm, the greater part of the galaxy mass is accumulated in the dark matter halo. ... The polar ring galaxies (PRGs) reveal external rings or disks of gas, dust and stars rotating in a plane roughly perpendicular to the disk of the central galaxy. ... The shape of the dark halo in the model was chosen so as to achieve the best fit to the observed rotation of both galaxies themselves and their polar rings. ... The SPRC-7 galaxy. ...

... Bad Astronomy . ... On Thursday, February 15th 2001 (and replayed on March 19), the Fox TV network aired a program called ``Conspiracy Theory: Did We Land on the Moon?'', hosted by X-Files actor Mitch Pileggi. ... Dust around the lander . ... However, it appeals to our common sense: when the sky is black here on Earth, we see stars. ... Bad: The program claims that when the top half of the lander took off from the Moon to bring the astronauts back into orbit, there was no flame from the rocket. ...

... David R. Scott (Colonel, USAF, Ret.) NASA Astronaut (former) . ... He has graduated from the Air Force Experimental Test Pilots School and Aerospace Research Pilots School. ... Scott served as command module pilot for Apollo 9, March 3-13, 1969. ... The ten-day flight provided vital information previously not available on the operational performance, stability, and reliability of lunar module propulsion and life support systems. ...

RELATIVE SUNSPOT NUMBERS Description of Data from SGD Explanation of Data Reports: Relative Sunspot Numbers -- The relative sunspot number is an index of the activity of the entire visible disk of the Sun. ... The provisional daily Zurich relative sunspot numbers, Rz, were based upon observations made at Zurich and its two branch stations in Arosa and Locarno and communicated by M. Waldmeier of the Swiss Federal Observatory. ... This indicates the uncertainty above and below the predicted number. ...

... Recent Topics . ... MAO main . ... Open access submissions and content now available . ... Отправлено: Thu, 15 Oct 2015 07:50:43 +0300 (EEST) Тема: Open access submissions and content now available Planetary and Space Science Welcomes Open Access Submissions @media only screen and (max-device-width: 480px) { } p { margin-top: 1em; margin-bottom: 1em; margin-left: 0em; margin-right: 0em; color: #53565A; } img { display:block; -ms-interpolation-mode:bicubic; } Can't see this email properly? ...

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... For many ATMs, having a good ray trace program on hand is pretty valuable. ... http://www.willbell.com . ... It is a slick Windows package with great graphics, but my most recent machine (Win95 OSR2) now encounters many error messages. ... OSLO LT : This is the freeware Windows version of OSLO - it is limited to 12 surfaces, but is otherwise amazing. ... KDP : This is another powerful, freeware Windows raytrace package. ... ZEMAX : This is yet another powerful, Windows raytrace package. ...