... October 4, 1995 . The Sun Spews X-rays . Credit: Yohkoh Soft X-ray Telescope , ISAS , Japan . Explanation: Our Sun is really very hot. The Sun's outer atmosphere is so hot that it emits much light in the X-ray band, which was unexpected. 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. ...

... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... For those of us who need on occasion to seek out truly dark skies, a group of members of the Amateur Astronomical Association organizes regular trips to sites in the New York metropolitan area suitable for deep-sky observing. ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by...

... From the observed direction of interplanetary magnetic field lines, we believe this field comes from the Sun, carried by magnetic field lines dragged out by the solar wind . ... That is why magnetic field-line loops tend to keep back the solar wind, unlike the outward-bound lines in the "coronal holes" between them. ... The magnetic field at all these points is already so weak that the solar wind overpowers it and shifts its field lines, while its own motion--radially outward--remains unchanged. ...

... Tonight's Sky . ... Observing . ... Bob Berman . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... Dave's Universe . ... Bob Berman's Strange Universe . Bob Berman's strange universe: Expect a surprise . ... Get instant access to subscriber content on Astronomy.com! ... If you are already registered on Astronomy.com, please log in below. ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

... CV . ... University of Cambridge . ... October 2010 - present . ... B.S., Physics and Math . University of Oregon . September 2006 - June 2010 . ... September 2008 - June 2009 . ... University of Oregon Physics Department . ... University of Oregon Physics Department UCORE Program . ... February 2007 - August 2010 . ... March 2007 - June 2008 . University of Oregon Society of Physics Students . Co-president: March 2007 - June 2008 . Active Member: March 2007 - June 2010 . ...

October 14, 2006 ---------------- Version 3.1 ----------- As of this version, XmTel is considered stable for routine use. and it is useful for the control of telescopes for both amateur and professional uses. ... XmTel does not yet include the suite of pointing corrections that are already in the menu system (but disabled). ... With the offset correction a well-aligned small telescope will point to arc minute accuracy and well enough to put an object in a CCD camera field of view. ...

... the time of observation . ... Observing the Changing Position of the Sun To Establish Cardinal Directions . ... Observations of the Sun's apparent movement across the sky and its pattern of rising and setting in the east and west horizon helped to establish the cardinal directions. ... The final stage of the Sun's return was marked by the observation that the Sun had reached its highest altitude when the full width of your mitted hand could fill the gap between the Sun and the horizon. ...

... Minutes Group a (photocopy of the table with signatures and stamps) – one page. ... Theoretical round problems a – one page. ... Practical problem 7 ab – one page. ... Grid-lines for the practical problem 7 ab – one page. ... Picture to fill for problem 8 b – one page. ... Solutions of the practical round problems – not ready full (LOC jobs not done) – ?? pages. ... Observational round problems – one page. ... Dr. Michael G. Gavrilov, Founding Chairman of the International Astronomy Olympiad, . ...

... Planets . ... Earth Satellites . ... The newly discovered ?mega-Earth? ... Its sibling, the lava world Kepler-10b, is in the background (the two planets? proximity is grossly exaggerated) .€а Kepler-10c has a diameter of about 29 000 km, 2.3 times as large as Earth, and weighs 17 times as much. ... The first mega-earth to be discovered is Kepler-10c which orbits a star lying about 560 light years from the Sun in the constellation Draco. ... Astronomers Find a New Type of Planet: The ?Mega-Earth? ...

The first stars, known as Population III, produced the first heavy elements, thereby enriching their surrounding pristine gas. However, all previous detections of metals in intergalactic gas clouds find a heavy element enrichment at least 1/1000 times that of the solar environment, which is higher than expected for remnants of Population III stars. ... Finally, I will summarise the prospects for finding similar systems in future surveys. ...

... From the peculiar shape of the light curve in the visible spectral region (a long phase interval of light constancy was observed by Hensberge et al. in 1981 ), HD 56022 had been expected to show unambiguously the nonequatorial symmetry of its surface brightness distribution. However, analysis of the light curve has yielded a possible equatorial position of a spot. ... A solution seems only possible, if the light constancy over the long phase interval in the visible is not observed in the UV. ...

DISCLAIMER: The larger the aperture, the more light a telescope will gather and the fainter the object you can see. Here is a range of magnitudes you might expect to see. Given excellent sky conditions and good optics, a well trained eye can sometimes add up to 0.8 magnitude to these values. Limiting Magnitude depends on much more than the instruments aperture. ... One formula is for aperture in inches the other is for aperture in millimeters. ... Aperture (inches) . ... 15.2 . ...

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. ...

XMM­Newton CCF Release Note XMM­CCF­REL­21 OM GTI Selection R. Much October 3, 2000 1 CCF components Name of CCF VALDATE List of Blocks changed CAL VERSION XSCS flag OM HKPARMINT 0003 2000­01­01T00:00:00 HKPARMINT No TRANSLATION No 2 Changes First release The CCF file om hkparmint provides the limits for the GTI check. Currently only dummy data are included. We expected the om hkparmint file to be updated, once a clear correlation between HKD and instrument performance is found. ...

Тема : Хвостатые гостьи V (информация для наблюдения комет) .. Показать сообщение отдельно . ... Хвостатые гостьи .. ... после того, как ISON приплыл мимо нас, земля находится на орбитальной траектории, которая пройдет через след частицы кометы (тот, который ISON оставил позади, когда это приближалось к солнцу и это случайно встретит или вокруг 12 января - 15, 2014 . ... лучшее время наблюдения 22:00 LDT (Northern hemisphere 45њ North) .. - радиант расположен вблизи Al'dzhabkhakh (30-Eta Leonis, ? ...

... 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 . ...

21.10 news 887 MH 19/10/04 2:15 pm Page 887 news Russians fear privatization of state labs Bryon MacWilliams, Moscow Senior officials in Moscow are attempting to reassure Russian scientists about details of a planned reform, under which many hundreds of the country's state research institutes could lose their government funding. ... We agree that Russian science does need reform," says Boris Stern, a particle physicist at the academy's Institute for Nuclear Research in Moscow. ...

Magnetic Stars, 2011, pp. 366 ­ 373 Sp ectral Variability of the Be Star HD 152478: Evidence for Magnetized Wind? ... Notable variations of line profiles have been found for a number of elements (H I, He I, Fe II, etc.) ... In this report we consider the large­scale profile variability, observed in the optically­thick H and H lines, and in several optically­thin Fe II lines. ... Figure 2: The same as in Fig. 1 but for H line profiles SPECTRAL VARIABILITY OF THE BE STAR HD 152478 .. ...

... 13, Moscow 119992, Russia, 2 University of Milano-Bicocca, Piazza della Scienza 3, Milano 20126, Italy, 3 University dell'Insubria, via Vallegio 11, Como 22100, Italy, 4 University of Padova, via Marzolo 8, Padova 35131, Italy We present Log N { Log S distribution for close-by young isolated neutron stars. ... 1 Introduction Neutron stars (NSs) and black holes (BHs) are among the most interesting astrophysical sources. ... 2 Isolated neutron stars In this section we discuss isolated NSs. ...

... Expected NICMOS Performance after HST Servicing Mission 3 . NICMOS Cooling System Design . ... NASA is developing the NICMOS Cooling System (NCS) to provide operation of NICMOS beyond the exhaustion of its stored solid nitrogen cryogen. ... The NCS combines an external radiator identical in design to the ACS/STIS Aft Shroud Cooling System (ASCS) planned for SM3, a Creare, Inc. reverse-Brayton cycle turbine cooler, and an EVA installed neon loop to the NICMOS dewar's cooling coil. ...