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   The two major items supplied by the second disk are images of
deep-sky objects and a detailed lunar image.  (Some lesser items
from the disk will be discussed after these.)
                                              
   By default,  the DSO images appear whenever you center on a deep-sky
object at a field of view smaller than 1.6 degrees.  They are displayed
much as if they were RealSky or DSS images,  and are controlled through
the "Extras... DSS/RealSky Images" dialog described on page 54.  Be
warned that there are tens of thousands of images provided;  if you attempt
to show all images covering,  say,  a 20-degree field of view,  it will
take a long time for Guide to show them all.  This is the main reason that
the images are,  by default,  only shown up to a 1.6-degree field of view.

   As was discussed on page 21,  Guide can show several planets and
natural satellites using different "maps".  For the Moon,  one of these
maps ("bitmap #3" in the Planet Display dialog) is only available from
the second Guide CD.  It was created from Clementine imagery,  and has a
resolution of a little better than a kilometer,  making it far more
detailed than any other available image.

   If you've set Guide up to access the second Guide CD,  then the
"bitmap #3" option in the Planet Display dialog for the Moon will no
longer by grayed out.  Select it,  and Guide will switch to that
bitmap.  Zoom in on the Moon,  and you will see far more detail than
was previously the case.

   The only downside here is that the imagery was taken at local noon.
Features at middle to high latitudes look quite good,  but those at
central latitudes tend to look washed out.

   Also provided on the second disk are:

   -- Extra asteroid elements.  The first disk contains elements that
allow Guide to show asteroids with good accuracy over the years 1996
to 2004.  Add in the extra elements from the first disk,  and this
grows to 1960 to 2023.

   -- Some additional user-added datasets,  such as the CCDM (Catalogue
of Components of Double & Multiple Stars),  the LEDA catalog of over
one million galaxies (_far_ more galaxies than are generally going
to be visible to anyone;  you may choose to stick to Guide's default
galaxy display),  additional star information from the Michigan Henry
Draper catalogues (shown when you click for "more info" on a star).

   -- Several files that are not of immediate use,  but which may be
used in updated software for Guide.  If so,  those updates will be
made available on the Project Pluto Web site.  This includes some tide
table data,  a list of two million place names around the world,  and
a JPL ephemeris file covering the years 1800 to 2200.

18:  ECLIPSES,  OCCULTATIONS,  TRANSITS      

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