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4.9 Shooting Stars

1) Title
Shooting Stars
2) Button functions
Show/hide labels Switches the names of solar system objects on and off.
Show/hide orbits Switches the orbits (orbital paths) of planets satellites, and comets on and off.
Change scale Switches displayed scale of the celestial body between actual size and magnified size.
Show/hide Leo Switches Leo picture and constellation outline on and off.
Show/hide dust Switches display of the comet and cometary dust on and off.
Landing/Launching Toggle button for switching between landing and launching.
Show Leonids Simulates the motions of comet Tempel-Tuttle between 1997 and 1998 and the 33 year peak of the Leonid meteor shower in November 1998.

* Click the button (initialization button) to show a scene of Leonids as seen from ground on November 17, 1997-1998.