    Sentence 1: Launched from -the space  shuttle Atlantis in 1989°, Galileo. will  have ..travelled _ about 4.6. billion.  kilometres by the time it hits Jupiter.    Sentence. 2: Launched from -space  shuttle Atlantis if news - web sites )-in  1989 , Galileo will have traveled about  2.8 billion miles by the time. it “hits  Jupiter .    