1. Galileo allegedly is the name of a covert project that was formed to facilitate the recovery, security, and transportation of alien craft. Most sources refer to such project as project Blue Fly, while the late Bill Cooper said this was part of project Pounce.

2. Galileo also is the name of the European GPS system, and of the network of satellites that are used in it.

3. Last but not least, Galileo also was the name of a NASA probe that was sent to Jupiter in 1989. It arrived in 1995, and was intentionally destroyed in Jupiter's atmosphere on September 21, 2003. 

All of them got their name from the Italian astronomer Galileo Galilei.