Existing Interstellar Probes
Five spacecraft (three active spacecraft) are currently on interstellar trajectories, unless they hit something after they stop communicating.
Read more about this topic: Interstellar Probe
Famous quotes containing the word existing:
“Too many existing classrooms for young children have this overriding goal: To get the children ready for first grade. This goal is unworthy. It is hurtful. This goal has had the most distorting impact on five-year-olds. It causes kindergartens to be merely the handmaidens of first grade.... Kindergarten teachers cannot look at their own children and plan for their present needs as five-year-olds.”
—James L. Hymes, Jr. (20th century)