Original: At this distance , signals from Voyager 1 take more than fifteen hours to reach its control center at the Jet Propulsion Laboratory , a joint project of NASA and Caltech in La Cañada Flintridge , California .
Simplified: At this distance , signals from Voyager 1 take more than thirteen hours to reach its control center at the Jet Propulsion Laboratory , a joint project of NASA and Caltech near Pasadena , California .