Zon Mosaic Pro5 User's Guide Page 27

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Basics 27
For example,
clicking on this
symbol for Mars
will expand the list to include the moons
of Mars. Clicking again collapses the list
and hides Mars’s moons. You can double-
click on any object in this list to centre on
the object in Starry Night’s main window.
Finding Celestial Events
If you want to know what is happening in
the night sky tonight, open the Events side
pane. Events such as lunar phases, eclipses
and meteor showers are listed for the
upcoming month.
To view an event, right-click (Ctrl-click
on the Mac) on the event name and choose
View Event from the contextual menu.
Starry Night Pro and Pro Plus users should
read “Event Finder
” on page 116 for more
information.
Zooming In On Objects
Now that you know how to find objects,
you will probably want to know how to
zoom in for close-up views of spectacular
objects such as Saturn and the Andromeda
Galaxy.
The amount of sky that you can see is
called the
field of view. If it were possible
to see the entire hemisphere of sky that is
above the horizon at any time, you would
have a 180° field of view. Of course, this is
impossible. Including some peripheral
vision, the human eye can see
approximately a 100° field of view. If you
look through binoculars, the area you see
is a much smaller piece of the sky, which
means binoculars have a correspondingly
smaller field of view (usually 5° to 7° ).
Telescopes have an even smaller field of
view than binoculars.
Starry Night opens with a 100° field of
view. We call this the normal field of view,
since it approximates a view of the sky
that you would see with your own eyes.
Along the top right corner of the toolbar is
a set of zoom buttons which adjusts your
field of view.
Clicking the (+) zoom
button on the right zooms in
(reduces your field of view), while
clicking the (-) button on the left zooms
out (increases your field of view). Clicking
the left zoom button and holding your
mouse button restores your field of view to
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