Three Questions about the Enceladus Plumes: Are Large Vapor Chambers Necessary? Do the Plumes Vary in Strength from Year to Year? Do Fractal Aggregates Fit the Brightness Data as Well as Solid Ice?

Andrew P. Ingersoll1, Miki Nakajima2, Shawn Ewald2 and Peter Gao3, (1)California Institute of Technology, Pasadena, United States, (2)California Institute of Technology, Pasadena, CA, United States, (3)Carnegie Institution for Science, Earth & Planets Laboratory, Washington, DC, United States