In order of release:1. Foo Fighters (1995) 2. The Colour And The Shape (1997) 3. There Is Nothing Left To Lose (1999) 4. One by One (2002) 5. In Your Honor (2005) 6. Echoes, Silence, Patience and...
They got it from a nickname that Allied forces gave to basketball sized unidentified glowing spheres they used to see floating in the air over the battlefields during WWII.