celestia software package provides real-time visual space simulation, you can install in your Debian 7 (Wheezy) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install celestia
celestia is installed in your system.
Make ensure the celestia package were installed using the commands given below,
$ sudo dpkg-query -l | grep celestia *
You will get with celestia package name, version, architecture and description in a table
| Distro | Debian 7 wheezy |
| Section | Science |
| Package | celestia |
| Version | 1.6.1+dfsg-2 |
| Description | real-time visual space simulation |
| Sub Section | Science |