recording oscillatory motions within the host planet, should provide new constraints on the interior structure of Saturn. Such oscillations are known to exist in the sun as well as other stars. Porco's team was responsible for the first sighting of a hydrocarbon lake, as well as a lake district, in the south polar region of Titan in June 2005. (A group of similar – and larger – features were sighted in the north polar region in February 2007.) The possibility that these sea-sized features are either completely or partially filled with liquid hydrocarbons is significantly strengthened by subsequent observations by other Cassini instruments. Her team was also responsible for the first sighting of plumes erupting from Enceladus, Saturn's sixth largest moon. They first suggested, and provided detailed scientific arguments, that these jets might be geysers erupting from reservoirs of near-surface liquid water under the south pole of the small moon. New Horizons Porco was a member of the imaging team for the New Horizons mission to Pluto and the Kuiper Belt through 2014. The probe made its Pluto flyby in 2015. The Day the Earth Smiled As the Cassini imaging team lead, Porco initiated and planned the capture of a picture of Saturn with the Earth in the distance on July 19, 2013, an image along the lines of the famous Pale Blue Dot photo. The taking of the image was part of a larger concept entitled The Day The Earth Smiled, in which people the world over were invited to celebrate humanity's place in the cosmos and life on Earth by smiling the moment the picture was taken. University positions Porco served in the faculty of the University of Arizona from 1983 to 2001, achieving tenured professorship in 1991. She taught both graduates and undergraduates and was one of five finalists for the University of Arizona Honors Center Five Star Faculty Award, a campus-wide student-nominated, student-judged award for outstanding undergraduate teaching. Porco is a Senior Research Scientist at the Space Science Institute in Boulder, Colorado, and she is an adjunct professor at the University of Colorado at Boulder. NASA advisor Porco has been an active participant in guiding the American planetary exploration program through membership on many important NASA advisory committees, including the Solar System Exploration Subcommittee, the Mars Observer Recovery Study Team, and the Solar System Road Map Development Team. In the mid-1990s, she served as the chairperson