planet earth - physics, technology, software near space - launch vehicles, satellites solar system - exploration & transportation deep space - interstellar travel terra firma - contact, resume, biography ku'u - the void: What is called the spirit of the void is where there is nothing. It is not included in man's knowledge. By knowing things that exist, you can know that which does not exist. That is the void.   Shinmen Musashi - Twelfth Day of the Fith Month, Second Year of Shoho (1645)