Astronotes Armagh Planetarium's Stellar Blog! ... Planets . ... Of the worlds in our Solar System (gas giants excluded) only Venus has a completely ice-free surface. ... The continued melting of polar ice and consequent freshening of the waters of the Arctic Ocean might stop some ocean currents €аaffecting the lives of hundreds of millions of people.€а Studying the ice worlds of space helps us understand the part that ice has played in the history of our own planet and our present day existence on it. ...

Magnesium : a new probe of the thermosphere / exosphere region V. Bourrier, A. Lecavelier des Etangs, A. Vidal-Madjar Institut d'Astrophysique de Paris/CNRS, Paris, France Atmospheric escape from HD209458b Transit observations in the Lyman- line of neutral Oxygen, carbon and silicium were also found in its Schlawin et al. 2010), carried away to high altitudes heavy species at high altitude: neutral ... 2003, Nature, 422, 143 Vidal-Madjar, A., DИsert, J.-M., et al. ...

... Space Res., 12, 265, 1992 planetary magnetic dipole: Mizutani, H., et al., ... Astrobiology, 7, 167, 2007 CME induced H+ ion pick-up loss at 0.05 AU for ` Hot Jupiters ' HD209458 b Mass loss ~1011 g/s even for weak CMEs Mmax strong magn. protection in reality Exoplanet magnetospheres - importance of magnetodisk Relatively large amount of observed Hot Jupiters (27%): survival of close-in giants indicates their efficient protection against of extreme plasma and radiation conditions ...

... Top Attractions of Russia . ... We sincerely hope the situation will improve and we are planning to include these regions as soon as it becomes possible. ... Southern Urals (including Bashkir State Reserve) . ... Eastern Sayan Mountains (including Tunka Range) . ... Altai Mountains (including Lake Teletskoe, Altai State Reserve, Katun Range) . ... Sub-Polar and North Urals and virgin forests of North of European Russia (including Yugyd-Va National Park and Pechora-Ilych National Reserve) . ...

Using the Huygens and Babinet principles van de Hulst [ 11 ] considered the problem of light scattering and extinction by a particle having the size and the refractive index . ... The absorption cross-section is . ... The range of applicability of the anomalous diffraction theory for the scattering amplitude is limited by small angles, however the formules for the cross-sections became good approximations for a wide class of particles. ... This problem for spherical particles was solved by A.Ya. ...

Общая Астрономическая Конференция > Практика > Астрономические наблюдения > Полярное сияние! Взгляды на небо! ... Просмотр полной версии : Полярное сияние! ... Только что мне позвонил Стас Короткий и сказал, что над Москвой наблюдается полярное сияние, и притом разноцветное. ... В Питере с 18-го по 31-ое марта стояли ясные ночи (и какие ночи - сказка!), а ночь 31.03/01.04 как раз зятянуло напрочь http://www.starlab.ru/ubb/frown.gif Думается, и над нами могло бы быть. ...

... The summer duration in one of these regions is shown to correlate well with solar activity characteristics, such as the Wolf number and the geomagnetic aa-index. ... This a vast geomagnetic anomaly and a that a heliomagnetic weather control Figure 2 Correlation between the Wolf numbers in April and the summer duration in the same year for odd solar cycles. ... Figure 3 Correlation between the aa-index in June and the summer duration in the same year for even-odd pairs of cycles. ...

The GSFC acousto-optic tunable filter (AOTF) camera was used at the Apache Point Observatory 3.5 meter telescope in Sunspot, NM, to image the night side of Venus. In the near-infrared, there are several spectral regions that are relatively clear in the Venus atmosphere. ... By imaging the Venus night side, an AOTF camera can determine spatial variations of trace molecular species in the Venusian atmosphere, and even study the dynamics of the zonal winds on Venus. ... APO Home Page . ...

. 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 .

... These trajectories have an initial flight from the Earth to a large distance (of about 1.5 million km), the following passive flight to the Moon's orbit, an approach to the Moon with a decrease of an energy of a particle (spacecraft) selenocentric motion to a negative value and the temporary capture in an elliptic orbit of the Moon's satellite. ... Several trajectories of this type are determined. ... Ivashkin V. V. On optimal trajectories of space flight to the Moon in the Earth--Moon--Sun system. ...

... Great oppositions. ... Proxima Centauri. ... Scientists proved that the problem of preserving the Earth's climate and the annual change of seasons can be solved by a small star, negligible mass, but similar to a main-sequence star, moving in a circular orbit around the Sun. ... Sombrero Galaxy. The Sombrero Galaxy, M104, is known as a holder of one of supermassive black holes. ... Roughly estimate the approximate mass of the supermassive black hole in the center of M104 (answer in solar masses m). ...

... 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. ...

apomask -- Create an apodizing mask image with zero background and a circular central mask with rounded off edge apomask output xdim ydim radius sigma k xpos ypos . output = "" [image] . ... The X dimension of the input image. ydim = 512 [integer] . The Y dimension of the input image. radius = 12.0 [real] . The radius of the central disk of the output image which is to be set to one. sigma = 2.0 [real] . The sigma of the roll-off region around the central disk. k = 0.5 [real] . ...

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Variations of total ozone content and lower ozone stratosphere temperature in Antarctic Region during winter-spring period A.V. Grytsai National Taras Shevchenko University of Kyiv Astronomy and Space Physics Department assen@univ.kiev.ua Data, used in the work work Total ozone: Total Ozone Mapping Spectrometer (TOMS) measurements during 1979 - 2005 and Ozone Monitoring Instrument (OMI) ones for 2006, for http://toms.gsfc.nasa.gov/ftpdata.html. ... A long-term TOC decrease is significant. ...

... Twenty-Six Year Monitoring of Water Masers IAU Symposium 242, Alice Springs 1 Contents of the work A sample of H2O maser emission sources has been observed since 1980. ... Rudnitskij et al. ... Twenty-Six Year Monitoring of Water Masers IAU Symposium 242, Alice Springs 4 Maser in a protoplanetary disc (S255) Flux density, Jy S255: H2O line profile 5 February 2002 Radial velocity, LSR, km/s Rudnitskij et al. ... Twenty-Six Year Monitoring of Water Masers IAU Symposium 242, Alice Springs 12 ...

... Illya Ivanovich Zalyubovsky was born on June, 15, 1929 in Poltava Region. He entered the physical and mathematical faculty of the Kharkiv State (presently V. N. Karazin National University) in 1949. ... Since 1965 he is the head of the department of experimental nuclear physics, and since 1967 the Vise-rector for scientific work. ... Since I. I. Zalyubovsky headed the department of experimental nuclear physics, the range of his scientific interests has broadened sharply. ...

... Bad Astronomy . ... Every few months, one of a series of questions comes up on the USENET group sci.astro involving tides, or the rotation of the Moon, or the recession of the Moon from the Earth. ... Why the Moon's rotation period is the same as the length of time it takes to orbit the Earth (same as number 1, but phrased differently). ... But when this happens, the time it takes for the Earth to rotate once will be slowed to exactly the same time it takes for the Moon to go around the Earth once! ...

Stellarium 0.12.3 . ... Classes . ... EmptySphericalRegion Class Reference . virtual SphericalRegionType љ . getType () const . ... Return the area of the region in steradians. ... virtual boolљ . ... Public Member Functions inherited from SphericalRegion . ... virtual SphericalRegionP љ . ... virtual const QVector< Vec3d > &љ . ... updateFillVertexBuffer (class StelRenderer *renderer, const DrawParams &params, bool handleDiscontinuity) . ... virtual bool EmptySphericalRegion::isEmpty . ...

... The RAS Meteorite Collection: State on the 1 st of June, 1999 . ... About the laboratory . ... Chondrite . ... Fall 15 April 1857. One mass of about 3 kg . ... Turkmenia, Chardgou region . ... One mass of 71.6 g . ... One mass of 1912 g . ... One mass of 841.6 g . ... Fall 13 September 1937. 15 masses totaling more than 210 kg . ... One mass of 1540 g . ... One mass of 11.335 kg . ... One mass of 2904 g. 2853 g . ... One mass of 115 g . ... One mass of 2788 g . ... One mass of 135 kg . ...