... Tonight's Sky . ... The Magazine . ... Star Atlas . ... An artificial comet holds secrets to Earths life . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... The planet has extreme temperature swings and perhaps active lava flows. ... A digital supplement to Astronomy magazine. ... Join TravelQuest International with Astronomy and Discover magazines on one of three great tour options surrounding this celestial spectacle . ... Astronomy Magazine . ...

The azimuth has an encoder on each side of the encoder rack gear. encoder 1 is on the dome side and is used for pointing the telescope. encoder 2 is on the ch side and is used to measure the bending of the azimuth arm. A reference scribe mark has been placed at 270 degrees on the ring girder. ... The correct position for the pointer on the reference mark is whereever it was when the last pointing model was made. ... az encoder error . ... new encoder in position (.jpg) .3 mm left of center mark . ...

... The Great Nebula in Carina . ... Eta Carinae , the most energetic star in the nebula, was one of the brightest stars in the sky in the 1830s, but then faded dramatically. Eta Carinae is the brightest star near the image center, just left of the Keyhole Nebula . While Eta Carinae itself maybe on the verge of a supernova explosion, X-ray images indicate that much of the Great Carina Nebula has been a veritable supernova factory . Tomorrow's picture: open space . ...

... Four Years of Saturn . ... Asteroid and Galaxy . ... Apollo class asteroid 2006 VV2 flashed past planet Earth in late March, approaching to within 3.4 million kilometers or about 8.8 times the Earth-Moon distance. Due to the proximity of its orbit to Earth and its estimated diameter of over 1 kilometer, 2006 VV2 is classified as a Potentially Hazardous Asteroid. ... APOD: 2007 April 1- Americans Defeat Russians in First Space Quidditch Match . ... Hale Bopp: The Great Comet of 1997 . ... April . ...

... Abstract Replace a marker in a string with a formatted double precision value. ... Brief_I/O VARIABLE I/O DESCRIPTION -------- --- -------------------------------------------------- in I Input string. marker I Marker to be replaced. value I Replacement value. sigdig I Significant digits in replacement text. format I Format: 'E' or 'F'. lenout I Available space in output string. out O Output string. ... The first occurrence of marker in the input string is to be replaced by value. ... The value was #...

... Now I have no time to grieve And now you're right all the time And I'm just oblivious I'd rather stay in bed with you Till it's time to get a drink (spoken: I'm hyperventilating ) @ SONG : It's Getting Late And you're ... made now And you're getting scared now What do ... now Never get to sleep now Now you're looking sorry ... you got to worry No you shouldn't do that No you shouldn't do that @ ...

... Matching the Surface of Best Focus . ... The plug-plates of SDSS project are responsible for locating the optical-fiber plugs spatially and for defining the plug tilt with respect to the surface of best focus. ... Approximately 670 holes are drilled in each plate. ... In the first attempts to match the curvature of the plug-plates to that of the best focal surface, the bending fixture was set upon 3 6.630mm metal supports that were affixed to a table top and spaced 120 apart. ...

ChangeLog for rgsrmfgen =============================== Version 0.50.2 - 2002-02-12 ( JDR ) -------------- - task description updated with correct default for the --ebins parameter Version 0.50.1 - 2002-01-17 ( JDR ) -------------- - supports arbitrary energy selection regions - bug fix: does not rely on implicit initialization of global variables Version 0.50 - 2002-01-16 ( JDR ) ------------ - changed default to --ebins=4000 Version 0.49 - 2001-10-10 ( ...

I was wondering what conditions should be met to have the "darkest" sky .. ... Upon the above publication of the Southern Galactic hemisphere, TunГ Tezel started seeking opportunities to create the Northern counterpart image. ... So, the initial quest of having the darkest possible sky have delivered us these two all-sky images of the two galactic hemispheres as seen from Planet Earth. Zoomable and 'full-screenable' fisheye view of the "darkest sky" Southern Galactic Hemisphere image. ...

Most of these images were obtained by Mike Bessell, Michelle Buxton, Hwankyung Sung, Ralph Sutherland and Bob Watson at SSO using a 2Kx2K Site CCD behind a Nikon or Hasselblad lens or directly on the 1m telescope. A few images are from the Hubble Space Telescope. Some of the M42 images were obtained with the KPNO 1m and ESO NTT telescope. One image is a mosaic of IRAS images. ... Details of the CCD imaging program at MSSSO. ... antenna.jpg (53KB) . ... ngc6744.jpg (59KB) . ...

These pages collect together references to many pictures of the solar system that can be found on the Net. ... Since I originally compiled this list the number of relevant images has grown tremendously. ... http://www.jpl.nasa.gov/pictures/ . ... ftp://dftnic.gsfc.nasa.gov/images/gifs/ . ... http://www.jpl.nasa.gov/galileo/images.html . http://www.jpl.nasa.gov/magellan/images.html . ... http://nssdc.gsfc.nasa.gov/image/planetary/ . ... NASA Image Access Homepage (Planetary Photojournal) . ...

. To sort a file in dictionary order: sort -d +1 -2names > orders . Lines in the file names are sorted on field 2 into dictionary order and the result placed in the file orders . To sort a file in month order: sort -M +2 -3 -o breakdown orders . Lines in the file orders are sorted on field 3 into month order and the result placed in the file breakdown .

... Corresponding authors will receive an e-mail with a PDF file of paged proof for checking and correction. The file can be read and edited using Adobe Acrobat Reader (version 9 and higher) which can be free downloaded via the Internet ( http://get.adobe.c om/reader/ ). ... You can use text correction tools to make corrections (after selecting the necessary text fragment). ... For users of Adobe Reader 9: . ... to insert text without replacing the existing text, use the "Insert text at cursor" tool. ...

... Data archive . Tasks . ... The first column in the table contains the pulsar name. The second column contains the priority. This should be -1 if the pulsar has been dropped, 0 if the pulsar should only be observed with very low priority or integers > 0 for the standard priority. Note that comments can be placed at the end of each line in the table. These comments get shown on the dashboard. ... Group . ... Pulsar Data Archive . PSRFITS pulsar data standard . ... Pulsar Groups . ...

... Changing a World . ... I was watching a PBS program about John Glenn's 1998 launch on the Space Shuttle when the idea first occurred to me. ... As the program went on to talk about space initiatives and what comes next for NASA, covering topics such as the International Space Station and Mars colonization, I began to realize how common-place some of this must be to my students, nearly all of whom have grown up in the post-Apollo era. ... All of this meant that I knew why I was interested in science....

To initiate orbital motion click on any of the icons in tool bar with red sign + or – , permitting also to speed or to slow planet motion by repeated clicking on them. ... Selecting Orbits item in menu bar and by subsequent choosing corresponding items in drop-down menu one can also fulfil the above actions. ... To enter new initial epoch or to change list of minor or major planets which are shown in the picture, select Orbits in menu bar and then select Input data in drop-down menu. ...

Next: Scattering properties Up: Polarization properties (transmitted radiation) Previous: Linear polarization: wavelength dependence . Traditionally, the main problem considered in connection with circular interstellar polarization is the meaning of the wavelength where changes the sign . ... This is also demonstrated by Fig. 19 (lower panel) which shows the wavelength dependence of the factors of linear and circular polarization for particles of magnetite as was done by Shapiro ([ 1975 ]). ...

... Bad Astronomy . ... I think I will break from my usual format of Bad Astronomy/ Good Astronomy by saying that the way we define seasons currently is not strictly bad, but I feel (in my opinion!) that it could be better. The definition of when the seasons begin is at the moment of solstice or equinox; that is, winter (in the north) starts on December 22 nd and summer starts on June 22 nd . ... Now imagine breaking up the Sun's 46 degree up-and-down yearly swing into 1 day intervals. ...

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