... Comet Ikeya-Zhang, designated C/2002 C1 (Ikeya-Zhang), is named after Kaoru Ikeya of Shizuoka prefecture, Japan, and Daqing Zhang of Henan province, China, who independently discovered it on the night of 1 February 2002. A preliminary orbit reported the following day indicated that it would come moderately close to both the Earth and the Sun and that it might become visible to the naked eye during late March and April 2002. ... Bailey, M.E., Clube, S.V.M. and Napier, W.M. The Origin of Comets . ...

... A Web browser with Java support and an account to establish a secure Internet HTTP connection to the Goddard Space Flight Center (GSFC), is everything needed in order to use the new Control Center System (CCS). Then full access to the telemetry of the Hubble Space Telescope (HST) is given (Figure 2). A public version of CCS is also available. ... Rifkin, A. 1997, Reengineering the Hubble Space Telescope Control Center System, Institute of Electrical and Electronics Engineers Inc. ...

Contact Russet McMillan (primary) or your Observing Specialists (secondary) for additional information. Contact Jack Dembicky for web page errors, corrections, ommisions, or additions. This page last updated: July 6, 2004 - JMD . This page last checked: September 14, 2003 - JMD . Configuring TUI to use the Echelle . Setting up the Echelle exposure parameters . Taking your Calibration lamps . ... Setting up multiple exposures . ... Stopping an exposure (discarding data) . ...

... Other Planned Activities Include Solar Observing Astrophotography Presentations and CCD Demo's Field Trip to AAAP Observatory at Jenny Jump Workshop: Learning to Use Your New Telescope Plus Swimming (life guards provided), Fishing, Volleyball, Basketball, Hiking, Game room Kayaking/canoeing (bring your own) on two lakes and nearby Pequest and Paulins Kill Rivers Registration Fees Camping and RV -- $35.00 per person ($45 after June 9) Bunkhouse -- $45.00 per ...

True Color Image Gallery: Galactic SNR | Magellanic Cloud SNR . ... Radio Images Page . ... Exposure uf . ... 9100 . ... Exposure uf Exposure time of unfiltered event file . Exposure f Exposure time of filtered event file . Click left mouse button on hyperlink below to download file . ... Event 2 FITS File . ... AUX file . ... 0.3 - 10.0 . ... N H = 0.3(10 22 cm -2 ) Assumed distance: 60kpc ( ) . see fit detail page for more about the fit. see chandra spectrum page for region used. ...

The Big Bang has no center. It is not an explosion radiating from a point. ... This shell has both an outer and an inner edge, and these can be used to locate the position of the explosion. But in the Big Bang there is no edge. The Figure below shows a galaxy A and the velocities measured by observers on A: . ... You might think that by backtracking the velocity vectors you can locate the center of the Big Bang (and it is at A) but this is not the case! ... FAQ | Tutorial : Part 1 | ...

Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... Investigations of the ionospheric response to strong magnetics storms which are usual for our latitudes, are of great interest. ... In the figure, we present ionospheric parameter dynamics during three perturbed days in July 2000. ...

... Exposure Time Calculator (ETC) . ... ESO - Public Surveys . ... the recommended values to use for DIT, . ... Detector on-chip integration (DIT): seconds. to your chosen value - a separate page gives recommended values to use for DIT - for modes 1 and 2 below you may wish to start with the maximum recommended values as these will minimize the effect of read noise (a total object exposure of Y secs with DIT=X secs will produce Y/X lots of read noise) and give you a lower limit on the time needed. ...

Catalina Sky Survey (CSS) . Minor Planet Center NEO Page . NEO Program Office NASA/JPL . NEO Confirmation Page . ... Andre Phillips SSO Weather Page . SSO Satellite cloud images . SSO Concam . Bureau of Met Cloud loop of Australia . SENTRY (JPL) . ... Siding Spring Observatory (SSO) . SSO Exploratory/Visitor's Center . ... Siding Spring Survey Main Page . ... Follow-up Astrometry with the 1.0-m at SSO . ... Links . ...

... Note on Filters: . A1 centered at 2500 angstroms with a width of 1200 angstroms . ... M31 otherwise known as the Andromeda Galaxy is the nearest large spiral galaxy to our own. Its overall size is about 3 degrees on the sky and thus only a portion of it can be imaged in a single UIT exposure. ... The total exposure time for the first field in M31 was 1300 seconds and done through the A1,B1 and B5 filters. ... A 650 second exposure through the B5 filter was obtained by Astro-2. ...

SXG Data Center . ... Sky visbility This utility permits to find the sky region that will be accessible for obsevation by the main telescopes of SXG. Observation opportunity programm This utility permits to find the the observation opportunity of given source ( RA, DEC ) during given MJD interval by the telescopes of SPECTRUM-XG directed along X-axis. Mask of the Earth/Moon This utility permits to find the sky region that will be blocked by the Earth/Moon for observation by SPECTRUM-XG . ...

... Our Sun is part of a huge wheel-shaped collection of stars. ... Astronomers have long suspected it was a very massive black hole, and that every galaxy had such a central mass, created early in the history of the universe. ... However, unless that object happens to be headed directly at the black hole (a relatively small target) it will just swing around and fly away again, like a comet making a pass at the Sun. The velocity acquired in falling towards the black hole also helps it escape. ...

... Мировой Центр Данных . ... Мировая система данных МЦД в России и Украине English . ... Данные . ... в Мировой Центр Данных по солнечно-земной физике в Москве ! МЦД по СЗФ является регулярным членом Мировой системы данных Международного совета по науке. ... Наш сайт содержит информацию о МЦД по СЗФ в Москве, его архивах и базах данных, о данных в прямом доступе и о возможности поиска данных, об участии центра в научных проектах и программах, а также ссылки на другие сайты с геофизическими данными. ...

... As is known, the observed distribution of massive stars in the direction of the Galactic center looks very peculiar: the vast majority of all massive stars are concentrated towards the central 1 pc or so (Genzel et al. ... In order to compare the observed distribution of X-ray sources in the Galactic center with what would be expected from the population synthesis computations, we have considered two hypothetical scenarios for the location of the starburst. ...

Central Astronomical Observatory at Pulkovo of Russian Academy of Sciences PUL Analysis Center Pulkovo IVS Analysis Center (PUL) 2009 Annual Rep ort Zinovy Malkin, Natalia Miller, Elena Popova Abstract This report briefly presents the PUL IVS Analysis Center activities during 2009 and plans for the coming year. The main topics of the investigations of PUL staff in that period were ICRF related studies, computation and analysis of EOP series, and VLBI2010 related issues. ...

... 2007 July 31 . A Laser Strike at the Galactic Center . ... Explanation: Why are these people shooting a powerful laser into the center of our Galaxy? ... Constant imaging of high-altitude atoms excited by the laser -- which appear like an artificial star -- allow astronomers to instantly measure atmospheric blurring . ... In this case, a VLT was observing our Galaxy's center , and so Earth's atmospheric blurring in that direction was needed. ... About APOD | ... A service of: ASD at NASA / GSFC . ...

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. ...

.

To obtain more information about satellites observing the sky in x-rays and gamma rays, you can contact the archive of the Laboratory for High Energy Astrophysics at Goddard Space Flight Center. Some documents in that archive can be linked directly from here: . General Information . ... Small Astronomy Satellite 3, a follow-up mission. HEAO 1 , High Energy Astronomical Observatory 1. ... Exploration" home page (index) Glossary . Official GSFC Home Page .. NASA WWW Home Page . ...

... Scientific Venues American Association for the Advancement of Science meeting American Astronomical Society meeting American Association of Physics Teachers meeting American Association of Variable Star Observers meeting .Astronomy Conference. ... Worth, TX University of Nebraska, Lincoln, NE Yale University, CT Conventions/Special Interest Meetings/Other (James Randi's) "The Amaz!ng Meeting" (2003 - 2009), Las Vegas, NV, Ft. ... Diablo Astronomical Society, Concord, CA Mt. ...