Zon Mosaic Pro5 Guide de l'utilisateur Page 111

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Bending Space & Time 111
Orbit Markers: The ascending node of the
orbit — the point at which the planet
crosses up through the ecliptic plane — is
marked with a solid wedge. The
descending node of the orbit — the point
at which the planet crosses down through
the ecliptic plane — is marked with a
hollow wedge. The point at which the orbit
comes closest to the parent body — the
pericentre — is marked with a bar. You
can turn off orbit markers by choosing
Preferences from the File menu
(Windows) or the Starry Night menu
(Macintosh), choosing General from the
dropbox in the upper left corner of the
Preferences dialog box, and unchecking
the box marked “Show node markers on
orbit lines”.
Orbit brightness: You can adjust the
brightness of object orbits by choosing
Preferences from the File menu
(Windows) or the Starry Night menu
(Macintosh), and selecting Brightness/
Contrast from the dropbox in the upper
left corner of the Preferences dialog box.
This dialog box has a slider which lets you
make orbits brighter or dimmer.
Orbit Colours: You can choose the colour
in which you want to display the orbits of
comets, asteroids, and satellites. See
Comet, Asteroid & Satellite Display
Options” on page 49 for more information.
You cannot modify the orbit colours for
planets.
Example: Viewing The Solar System
From Above
This example combines many of the
different techniques in Starry Night for
changing your viewing location.
1 Click on your current location in the
toolbar and choose
Other... to open the
Viewing Location dialog box Change text
options to . Click the
List tab.
2 From the dropboxes along the top of
the dialog box, select View From “The
Surface Of” “Sun”.
3Click the
Latitude/Longitude tab and
change your latitude to 90
° N. Press the
Set Location button. This will change your
location to the north pole of the Sun.
4 Use the Increase Elevation button to
increase your elevation until you are 60 AU
above the north pole of the Sun. As you
move higher, you will see several of the
“stars” in the sky move away. These “stars”
are actually planets, as you will see in a
minute.
5 Right-click on the Sun (
Ctrl-click on the
Mac) and choose
Centre from the contex-
tual menu.
6Open the
Options pane and expand
the Solar System layer. Check the box for
“Planets/Moons”. Click on the words “Plan-
ets/Moons” to open the
Planets/Moons Options dialog box. In this
dialog box, check the “Labels” box. You
should now be able to see labels for all the
planets.
7Open the
Find pane and check the
orbit column for all planets. You do not
need to turn on the orbits of moons, aster-
oids, or comets. You should now be able to
see a view of the entire solar system
onscreen.
8 Change your time step in the toolbar to
a discrete value of 20 days, then press the
Forward button to start time moving for-
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