<Li> Principal investigator: Norman F. Ness / NASA Goddard Space Flight Center (website) </Li> <Li> Data: PDS / PPI data catalog, NSSDC data archive </Li> <Tr> <Td> Plasma Spectrometer (defective) </Td> <Td> (PLS) </Td> <Td> Investigates the microscopic properties of the plasma ions and measures electrons in the energy range from 5 eV to 1 keV . More <Ul> <Li> Principal investigator: John Richardson / MIT (website) </Li> <Li> Data: PDS / PPI data catalog, NSSDC data archive </Li> </Ul> </Td> </Tr> <Ul> <Li> Principal investigator: John Richardson / MIT (website) </Li> <Li> Data: PDS / PPI data catalog, NSSDC data archive </Li> </Ul>

How long did it take voyager to leave the solar system