... The fact that the Sun is a gas, however, lets different regions pass by one another fluidly. ... This differential rotation has interesting ramifications for the Sun's magnetic field. ... This bizarre distortion of the magnetic field results in active phenomena on the surface of the Sun. ... Magnetic instabilities in the solar field cause short, violent ejections of gas called solar flares-the most explosive events on the Sun. ... The Sun can also be viewed safely through special types of filters. ...

... Telescope concept . ... The Submillimetron Project is dedicated to astronomical studies at the submillimeter and far infrared wavelengths using a cryogenic telescope located on the Russian segment of the International Space Station (ISS). The Astro Space Center of the Lebedev Institute of the Russian Academy of Sciences is responsible for developing the Submillimetron Project. ... Currently, the Astro Space Center is carrying out a pre-Project study under contract with the Russian Space Agency. ...

SINGULAR POINTS IN THE SOLAR CHROMOSPHERE . ... In the structure of the solar chromosphere, containing information on the configuration of the magnetic field, we have found and identified all the main types of the singular points ( see Fig. 1 ), which are known as inherent features of the 2-D vector field. ... The main types of the singular points are the node, the focus, the center, and the saddle. ... Singular point of the focus type in the solar chromosphere. ...

... 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. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Armagh Planetarium . ... Sun . ... Space Flight . Human Exploration . Robot Exploration . ... March . ... Posted on March 14, 2011 | ... Continue Reading.. Posted on September 27, 2010 | ... 1 Comment On 10 March 2010, I gave a talk covering the big picture to the IAA. ... Here you will find the latest news and views from the fascinating worlds of astronomy and space exploration. ... Subscribe to Astronotes . ...

... 11 Yellow-Green (78% transmission): Contrasts well with the red and blue characteristics of surface features on Jupiter and Saturn. ... 82A Light Blue (73% transmission): Useful on the Moon, Mars, Jupiter, and Saturn, this subtle pale blue filter enhances areas of low contrast while avoiding significant reduction of overall image brightness. ... Meade Series 4000 Photo-Visual Color Filters may be ordered individually or in the following sets: . ... Meade Series 4000 Broadband Nebular Filters . ...

After filling in and submitting this form it will be processed and sent to WDC for STP data manager responsible for the data of your interest. ... ACCRA ADAK AHMEDABAD AKITA ALERT ALICE SPRINGS ALMA ATA AMDERMA ANCHORAGE ARCTICA (NP-06) ARCTICA (NP-07) ARCTICA (NP-08) ARCTICA (NP-10) ARCTICA (NP-11) ARCTICA (NP-13) ARCTICA (NP-16) ARCTICA (NP-19) ARECIBO ARGENTIA ARGENTINE IS ARKHANGELSK ASHKHABAD ATHENS AUCKLAND BADDOW BAGNEUX BAGUIO BAIE ST PAUL BAKER LAKE BANDOENG ... Start time: . ...

... part 1 | ... The Basic Stages in Earth's Pre-geological Development . ... After fragments of the Vortex sleeves separated, whirlwinds of second and third orders ("NC" - new micro-vortex) were generated- future planet cores and their satellites - all of them developing independently, governed by the common laws of development of cosmogenic vortexes. ... Our planet's core today is comprised of considerably deteriorated cosmogenic vortex; consequently, the Earth has a moderated magnetic field. ...

... Sea Surface Temperature, restored from NOAA satellite data . You may use Java applet to view temperature maps in more detail. Using the applet, you can build "accumulated" temperature maps from selected data, get temperature values in any point and save the resulting image to your local disk. Date and time of the data . ... 14:25 (GMT) . 3.04.2016 . ... For information send a mail to: info@sputnik.infospace.ru . ...

... Exposure Time Calculator (ETC) . Survey processing . ... VISTA is a 4-m class wide field survey telescope for the southern hemisphere, equipped with a near infrared camera (1.65 degree diameter field of view at VISTA's nominal pixel size) containing 67 million pixels of mean size 0.34 arcsec and available broad band filters at Z,Y,J,H,K s and a narrow band filter at 1.18 micron. A wide field visible camera, if constructed, could also be used on VISTA. ... Tile . ... ESO VISTA Public Surveys . ...

... 8, ``Celestial Mechanics'', 2002 An approximate projection of confidence ellipsoids of space objects positions onto the celestial sphere A. P. Baturin Research Institute of Applied Mathematics and Mechanics, Tomsk, Russia The approximate method of calculation of a visible border of probable motion regions (PMR) for space objects (SO) has been considered. ... As a result, the simple analytical expressions for border points of PMR projection onto the celestial sphere have been obtained. ...

... COMPUTER SIMULATION OF RADIOWAVE MULTIPLE SCATTERING EFFECTS IN IONOSPHERE USING MONTE-CARLO METHOD . ... Distribution of reflected radiation on the ground is computed. ... Such influence can be remarkable if the scattering is multiple, i.e. the optical thickness for the scattering process is considerably greater than a unit. ... Radiation energy transfer in the slab is modeled by distribution of some particles carring small portions of radiation energy. ... The isotropic plasma approximation is...

Our brief introductory notes on optical characterization of media define different optical parameters (including the refractive index, dielectric permittivity, absorption coefficient, reflectance, transmittance) and show their relationship. ... A Postscript version of the remarks is here . ... A brief description of the JPDOC was printed in the A Suppl (the Postscript version of the paper is here ). ...

... SMIS ] . PROJECT "FOREST FIRES 96" . ... Moscow . ... Vologda (east part) . ... Komi (north part) . ... Komi (south part) . ... Ural (north part) . ... Ural (south part) . ... Tyumen (north part) . ... Tyumen (south part) . ... Irkutsk . ... Krasnoyarsk (north part) . ... Krasnoyarsk (south part) . ... Irkutsk region (north part) . ... Irkutsk region (west part) . ... Irkutsk region (east part) . ... Chita (north part) . ... Khabarovsk (north part) . ... Sakhalin (north part) . ...

. Small black points show all QSOs known previously before the start of this survey. | Front page | . | << - Survey description objectives | . Robert J. Smith, ">rsmith@mso.anu.edu.au Last modified: Fri Sep 24 11:39:02 EST 1999 .

... 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 . ...

THE AMATEUR ASTRONOMERS ASSOCIATION OF PRINCETON PRESENTS THE 23nd ANNUAL JERSEY STARQUEST Held at the Hope Conference and Renewal Center , Hope , NJ Beginning at 3 PM Friday, September 6, 2013 and running through 12 PM Sunday, September 8th 2013 Featuring Stargazing at a star ... available: Fishing, Hiking, Kayaking/canoeing (bring your own equipment) on two lakes and nearby Pequest and Paulins Kill Rivers Registration Fees Camping and RV -- $35.00 ... TOTAL NUMBER OF CHILDREN (Ages 6 ­ 12)? ...

Some results of the study of shells (arcs) in the near-nucleus region of comet Hale-Bopp are presented. ... All these calibration procedures gave an opportunity to draw on each image a polar coordinate grid ( rho, phi ), where rho - the distance of the shell point from the nucleus (cometocentric distance in 10 4 km), phi - the polar angle measured with respect to the axis directed to the Sun. ... T = Delta t / (N + Delta N) = Delta t / (N + Delta psi / 360) = 360 Delta t / (360 N + Delta psi), (2) . ...

... Big ellipse: the region of the photometric analysis Smaller ellipses: the adopted inner boundaries of the Main Body and the C component Small circles: diffuse background objects, manually selected and removed from the photometry Uncleaned CMDs [V-I, I] of I Zw 18, obtained using Aloisi et al. (left) and Izotov & Thuan (right) datasets. ... Where is the 'halo'? Blue compact dwarf galaxy SBS 1415+435 Hubble Space Telescope / Advanced Camera for Surveys NASA, ESA A. Aloisi (STScI, ESA) et al. ...

... Go to This section of the glossary . ... APHELION : The point in a planet's orbit where it is farthest from the sun. ... It melts at 83.95 K, and boils at 87.45 K. Many people don't realize that argon makes up a full 1% of our atmosphere, while carbon dioxide is only a fraction of a percent of our atmosphere. ... COMET: An object moving about the sun in an eccentric orbit and composed of materials which, on warming up near the sun, form a "tail" which always points away from the sun. ...