For the selected intervals of the UT the co-ordinates of 4 spacecraft are shown with 10-min step. ... The region designations used in the numerical files. The simulative geophysical region models . ...

The TCC supports the following coordinate systems: . ICRS: the current RA/Dec standard. The default date of observation is J2000. ICRS is FK5 J2000 (for all practical purposes) but has no date of equinox . ... The date specifies both the date of equinox (usually J2000) and the date of observation . ... The date specifies both the date of equinox and date of observation . ... Warning: the following coordinate systems are rarely used (except Mount for parking the telescope). ...

asncombine -- Process and combine images in one or two NICMOS associations asncombine association . ... set to yes to include error planes in co-added images error. background . ... This is useful to use different background subtractions for different images. fheader . set to yes in order to multiply the background by the value of keyword "factor" in the image header. ... Set to yes to use quadrants statistics save in the image header from previous runs of asncombine. regquad1 . ...

... Content Model: %text, but no nested anchors . The anchor <A> element is used to define the start and/or destination of a hypertext link. In previous versions of HTML it provided the only means for defining destination anchors within documents, but you can now use any ID attribute as a destination anchor so that links can now be made to divisions, paragraphs and most other elements. ... CLASS . ... This attribute is used to define a named anchor for use as the destination of hypertext links. ...

. Download Izmccd (~2.7 MB). Viewing of image. Use the following functions of the program for viewing an image: . 1) Increase/decrease of scale. For this purpose, press / on the toolbar; and click on any place of the frame. There will be a change of scale. Besides the image will be centred on this place. 2) Increase/decrease of brightness is made by buttons / , or through adjustment of values of a background and range. This is the  button. 3) Mode of a negative is . Previous Next . Main page

... This API (Application Programming Interface) document has pages corresponding to the items in the navigation bar, described as follows. The Overview page is the front page of this API document and provides a list of all packages with a summary for each. ... Each package has a page that contains a list of its classes and interfaces, with a summary for each. ... Each of these pages has three sections consisting of a class/interface description, summary tables, and detailed member descriptions: . ...

... Information about a variety of different calendars for different cultures (e.g., Christian, Jewish, Muslim, Chinese, Hindu etc.) ... In addition, the Chinese had two different ways of interpreting and observing celestial events. One way the Chinese used astronomy was known as lifa; it was a discipline that aimed to understand the regularities and the predictable events in the celestial system through careful, observations, measurements and records. ... back to Teachers' Newsletter Main Page ...

... I have always heard that everything we see is "star stuff" from previous stars that died after converting their hydrogen into heavier elements. So how is there any hydrogen left for the Sun and planets? ... Hydrogen is the main source of fuel for stars like the Sun. ... Get instant access to subscriber content on Astronomy.com! ... If you are already registered on Astronomy.com, please log in below. ...

... America Returns to Space Flight . ... Hyperion: Sponge Moon of Saturn . ... Unusual Gas Filaments Surround Galaxy NGC 1275 . ... How were the unusual gas filaments surrounding galaxy NGC 1275 created? No one is sure. Galaxy NGC 1275 is the central dominant galaxy of the Perseus Cluster of Galaxies, a cluster with many member galaxies visible in the above image. In visible light, NGC 1275 appears to show a spectacular collision between two distinct galaxies. ... A frozen patch of water ice. ...

Astronomy Discussion Forums . Forums: . Atm ћ Astrophotography ћ Blackholes ћ Blackholes2 ћ CCD ћ Celestron ћ Domes ћ Education . ... Discussion Forums . ... Your Description Is To Vague. Forum List | ... Post Message | ... www.astronomy.net . ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... FTP access the basic models is here . ... Below, we put short descriptions of the used SED models for the photometric redshifts providing by the current server . ... The uniqueness of this model consists in expanding to the near IR (NIR) of Rocca-Volmerange and Guiderdoni's (1988) atlas of synthetic spectra with a revised stellar library, which includes parameters of cool stars. ... Homepage of the GISSEL model). ... Another model used earlier is the model of synthetic spectra of Poggianti (1997). ...

... On-line Data . ... The program enables to find out the exact present Earth coordinates of the international space station and "Shuttle". ... J-Track - this program is similar to the previous one, however it knows how to display images and orbits of space vehicles. ... NASA SkyWatch - a program for those, who are fond of watching artificial space objects through the telescope, field - glass or with the unaided eye. ... Info: Industry news On-line Data Company ATLAS news Events We in press Contact . ...

The revision of the MASS/DIMM star catalogue N. Shatsky, V. Kornilov March 16, 2008 Abstract The compilation of the (updated) version of the MASS (MASS/DIMM) device target catalogue is described. ... Then the list was cleaned according to following criteria: I. Remove stars too faint for a MASS device. ... Here the color equation of the Sternb erg device was taken: M AS S mag = V mag + 0.45 (B - V ); stars with M AS S mag > 3.2 were removed. ... This was made based on the GCVS4.2 catalogue data. ...

. Information for database users . Go to previous page . Description and abbreviations (minor planets) . Description and abbreviations (planets and satellites) . Information about observations . List of publications .

Origin of the Small Solar System Bodies . ... During the last decades of the twentieth century joint efforts of scientist from different countries made it possible to develop a standard scenario of the origin of the Sun, planets and other bodies of the Solar System that satisfied basic observational data accumulated by astrophysics and comparative planetology. Following are brief description of this scenario and the problem of the origin of the small Solar System bodies. ...

... Step 1: The Footprint position calculation by the magnetic field line tracing from the satellite position up to the Ionosphere by using IGRF + Tsyganenko [1987] magnetic field model (the stop trace altitude 110 km). Step 2: Tracing back from the Footprint (produced on the Step 1) to the dipole equatorial plane (by using only IGRF magnetic field model up to the geocentric distance 8 RE and dipole field model after this distance). ... Back to the description . ...

... Next Routine] [List of Routines] NAME: ADD_HEADER PURPOSE: addition information from FITS-headers MPFS-frames DESCRIPTION: The function computes the total exposure, mean value zenit distance and modified FITS header CALLING SEQUENCE: Result =ADD_HEADER( headers ) CATEGORY: reduction MPFS-data INPUTS: Headers = String array FITS-headers from the MPFS data OUTPUTS: Header = String array containing the header from the FITS file. ... OPTIONAL INPUT KEYWORD PARAMETERS: BEFORE = Keyword string name. ...

... Lagoon Nebula, Trifid Nebula and the NGC 6559 Complex – Negative Image . This negative view of the previous image highlights the dark nebulas in the region. Same acquisition data as the previous image: 5nm Hydrogen-alpha filter, Total= 48 minutes, 8 x 360-second unbinned sub frames. Takahashi Epsilon -180 – f/2.8, SBIG STL6303E CCD camera, ATMoB Clubhouse, Westford, MA. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

As an obligatory preparing for the application to participate in the IAO a short report of National Olympiad of the current year with a set of all problems used on the Olympiad has to be presented by the applicating team. ... The final minutes (protocols written in Latin or Cyrillic in form of tables) of the Olympiad (evaluating of solutions of the students participated in the last stage of the Olympiad) should be included as well. ... Historical data of the National Astronomy Olympiad: . ...