Open Starry Night, go to Preferences ---> Start Up

Under maximum number of asteroids you can change it too "99999"

Restart SN7.

Note, you will need a fast computer to read in all the asteroids. FAST. Otherwise your computer will choke.

If you want the ENTIRE available asteroid database look here:

http://www.naic.edu/~nolan/astorb.html

Download this:

ftp://ftp.lowell.edu/pub/elgb/astorb.dat.gz

Unpack the .gz file. Rename the "astorb.dat" file as "Asteroids.txt"

Place the file in the SkyData folder found here:

1. From the Finder menu bar navigate to Go > Go to Folder.
2. Type: ~/Library
3. In Library go to Application Support ---> Simulation Curriculum ---> Starry Night Prefs ---> Sky Data <--- put the Asteroids.txt file in here.

If you get it to work, you'll have something that looks like this:

http://www.simulationcurriculum.com/products-astronomy-education.html

See first iMac mockup w/ asteroids image (and thirst slider in the carousel).