birth_place nationality name field work_institutions birth_date known_for residence spouse image article_title birth_name alma_mater
abington , pennsylvania , u.s. american mark r. showalter astronomy , astrophysics , space science , planetary science seti institute 05 december 1957 discoverer moon pan , uranian moons mab and cupid , uranian or rings μ and ν , neptunian moon s/2004 n 1 co-discoverer , plutonian moons kerberos and styx of jovian gossamer ring , saturnian california , u.s. frank yellin markrshowalter.jpg mark r. showalter
 mark robert showalter oberlin m.sc . -rrb- , -lrb- ph.d. -rrb- college -lrb- b.a. -rrb- ; cornell university -lrb-
mark r. showalter

mark robert showalter -lrb- born december 5 , 1957 -rrb- is a senior research scientist at the seti institute .
he is the discoverer of six moons and three planetary rings .
he is the principal investigator of nasa 's planetary data system rings node , a co-investigator on the cassini -- huygens mission to saturn , and works closely with the new horizons mission to pluto .
