I downloaded the file celestia-1.3.0.tar.gz twice. Both times when I gunzip it, I get the following error message: "celestia-1.3.0.tar.gz is not a gzip format file." I have even tried to use WinZip 8.1 and get the same message when trying to view the file's contents (which should be celestia-1.3.0.tar

Has anyone else run into this problem?
If more info from me is needed, let me know and I will get back as soon as possible. Since I am a full-time college student and work full-time, please understand if it takes me awhile to get back.
thanks for any help