. New processing of Lunar Prospector data gives scientists a better look at the Moon's thorium, which exists almost exclusively on the Earth-facing side. Lighter colors indicate higher thorium levels. Thorium lows mark Copernicus and Pythagoras craters, which punched into the Moon's feldspar-rich crust. Lawrence et al. 2007/GRL

... S/ 1981 S 15 174000 S/ 1981 S 16 220000 S/ 1981 S 17 231000 S/ 1981 S 18 185000 S/ 1981 S 19 186000 S/ 1995 S 1 137450 S/ 1995 S 2 139700 S/ 1995 S 3 141050 S/ 1995 S 4 146450 S/ 1995 S 5 140060 S/ 1995 S 6 139910 S/ 1995 S 7 139440 The first two groups are derived from analysis of Voyager 2 data reported in IAUC 6162 ; the third group is from HST observations during the May 1995 ring ... S/1995 S 3 orbits just outside the F ring and is apparently a shepherd moon . ... New Moons ....

... Flux density at 1 GHz (/Jy): 8 . ... Optical: Filaments and diffuse emission. ... NRAO 300-ft at 2.7 GHz (5': S=5.3?0.6 Jy). van den Bergh 1978, ApJS, 38, 119. Optical. ADS . ... NRAO 300-ft at 2.7 GHz (5': S=4.8?0.3 Jy). ... 1975, AuJPA, 37, 75. Molonglo at 408 MHz (3': S=11.7 Jy). ... Dickel & DeNoyer 1975, AJ, 80, 437. Arecibo S 430 MHz =20?10 Jy, S 318 MHz =20?3.6 Jy. ... Einstein and optical observations. ... VLA at 327 MHz (59") and 1.49 GHz (52"), plus X-rays. ...

Next: Rotation Periods of ZAMS stars Previous: T Tauri Stars . ... The first attempts to directly measure periodic modulation of T Tauri stars occurred in the early 1980s. Rydgren & Vrba (1983) observed four PMS stars using photoelectric photometry over a period of seven consecutive photometric nights. ... Because the spot lifetime is much longer than the rotational period, the observed effect will be a modulation of the light from the star synchronously with the rotation period. ...

... If the Earth is round, the Sun must be north of the equator in northern summer, and south of the equator in northern winter. ... From the Earth's perspective, the Sun is spiraling from north to south and back again along the ecliptic (see figure 7 ). ... The round Earth, at the summer solstice. ... If the rotation axis of the Earth is tilted with respect to its orbit, the equator bobs back and forth, causing the Sun to be north for half the year, and south for the other half (see figure 9 ). ...

C C RECORD FORMAT FOR P R I N C I P A L M A G N E T I C S T O R M S C C Cols Fmt Description C -------------------------------------------------------------------- C 1 I1 Continuation column. Primary records are indicated C by a blank, first continuation records by a 1, and C second continuation records by a 2, etc. ... Blank indicates no data. ... C 20 A1 First amplitude sign, minus sign or blank. ... C 26 A1 Second amplitude sign, minus sign or blank. ... Blanks indicate no data. ...

... Be Stars . ... Stellar Winds . ... He had found the first emission line star. ... More emission line stars were found soon, and one had to make subclasses to keep some overview. Cas is a main sequence B-type star, and together with other such stars showing hydrogen emission it forms the class of "Be stars", where the "e" stands for emission. ... Struve further speculated that those stars would be surrounded by a disk, basically thrown off the stellar surface by the rapid rotation. ...

. Figure 4. The 195 SOHO/EIT derotated fixed-difference images showing large-scale dimmings in eruptive events during the 2nd rotation of the active complex from November 13 to December 2, 2003. For each event, the date as well as the time of analyzed and subtracted images are indicated at the bottom of the frames. To the parent page .

. Main . Staff . Research . Publications . Conferences . Links . q = M 2 : M 1 = 0.03, e = 0.5, "warm" disk ( с = 0.05), accretion rate = 10 -9 /year. The rotation angle of the apsidal line relative to the observer and through "_" the orbit inclination to the line of sight are indicated in the lower left corner of each diagram.

Magnetic Stars, 2011, pp. ... We discuss a recent detection of a strong, organized magnetic field in the bright, broad­line B2V star, HR 5907, using the ESPaDOnS spectropolarimeter on the CFHT as part of the Magnetism in Massive Stars (MiMeS) survey. ... 2010; Rivinius et al., 2010). ... From our longitudinal magnetic field measurements, we confirm this period, which we adopt as the rotational period of this star (see Fig. 1), making it the fastest rotating, non­degenerate magnetic massive star! ...

... Circle rotations. ... Symbolic dynamical systems: sequence spaces, Markov chains, adding machines. Birkhoff recurrence theorem. ... Tent map. ... Expanding maps of a circle. ... Topological entropy. ... Finiteness of entropy for Lipschitz self-maps. Entropy for symbolical dynamical systems. ... Entropy for one-dimensional maps. Entropy for expanding maps and the Misiurewicz-Przytycki theorem. ... Structural stability of expanding circle maps. ... SRB measures for expanding maps. ...

... Bad Astronomy . Misconceptions . ... Bad Astronomy : The Moon only shows one face to us because it is not rotating. Better astronomy : The Moon only shows one face because it is rotating, once every time it revolves around the Earth. ... Place the Moon model on the table about 30 centimeters (one foot) away with the X facing the Earth model. ... You'll see that to keep the X facing the Earth model, you have to rotate the Moon model as it goes around the Earth model . ... 2008 Phil Plait. ...

arxiv:1404.0901 Обнаружение рентгеновского излучения от первой системы из черной дыры и Ве-звезды (Discovery of x-ray emission from the first be/black hole system) . ... arxiv:1404.4933 Кандидат в двойные сверхмассивные черные дыры с миллипарсековым расстоянием в галактике SDSS J120136.02+300305.5 (A milliparsec supermassive black hole binary candidate in the galaxy SDSS J120136.02+300305.5) . ... обзор arxiv:1404.1740 Нейтринная космология и Планк (Neutrino cosmology and Planck) . ...

Static Fourier spectrometers are often used for spectral measurements of the ionosphere emissions. There are two main advantages of Fourier spectrometers (FS) - large geometric factor and high spectral resolution; these parameters are two orders better than for grating spectral instruments. ... In scanning Fourier spectrometer optical and electric modulation of signal is used to avoid this problem, for static Fourier spectrometer there are no such ways. ...

... The syntax of the rtftohtml command is as follows: rtftohtml [-i] [-o filename] [-P extension] [-T] [-G][file] . ... Indicates that imbedded graphics
should be linked into the main document using an IMG tag. ... Use "extension" as the extension for any links to graphics files. ... If standard input is used, the body of the document will be written to standard output (unless overridden by the -o option.) If a file name appears, the output is written to "filename" with ".html" as an extension. ...

Добро пожаловать, Гость . ... На форуме начался конкурс - Астрофотография месяца: АПРЕЛЬ! ... Астрофотография (Модераторы: Павел Бахтинов , Ivan Mhitarov ) ? Cassini division much better than yesterday-live!!! . ... 0 Пользователей и 1 Гость просматривают эту тему. Гость . Ответ #20 : 01.11.2003 [07:42:47] ? ... Записан . ...

Superconducting Integrated Submm Spectrometer for Laboratory Applications Specification: · Input frequency range : 200 ­ 700 GHz (covered by four exchangeable sensor modules each one covering range of about 100-150 GHz ); · Output frequency (IF) range : 1-2 GHz · Receiver noise temperature: below 500 K (direct ... The SIR chip is a superconducting integrated circuit comprising a quantum-noise-limited SIS mixer and a tunable Josephson local oscillator (LO). ...

Each Apache configuration directive is described using a common format that looks like this: . ... This indicates the format of the directive as it would appear in a configuration file. This syntax is extremely directive-specific, and is described in detail in the directive's definition. ... If the directive has a default value ( i.e. , if you omit it from your configuration entirely, the Apache Web server will behave as though you set it to a particular value), it is described here. ...

This page is devoted to information on Supernova 1999ac in NGC 6063 . ... Information on the original web pages for many of these images can be found on the Supernova links web page. 1999 just keeps getting better and better. 1999ac was discovered by the KAIT team at Lick Observatory. ... M1 Supernova Search has a 1999ac images page . Seiichi Yoshida has a 1999ac images page . ... CCD . ... KenIchi Kadota . ... 3/4/99 02:22:25 JST . ... From [ vsnet-alert 2721 ] SN 1999ac in NGC 6063 . ...

GCVS Variability Types and Distribution Statistics of Designated Variable Stars According to their Types of Variability ======================================================================== I. GCVS Variability Types. ... The new variability types (ZZO, AM, R, BE, LBV, BLBOO) have been added in the Name-Lists 67- 72 and in the GCVS vol.V. ZZO ZZ Cet type variables of the DO spectral type showing HeII and and CIV absorbtion lines in their spectra. ... RCB Variables of the R Coronae Borealis type. ...