Hi Brittani!
In the field of planetary science, Margaret Kivelson who was at UCLA before she retired, is a very important scientist. She is one of the people who helped discover that Jupiter's moon Ganymede has an internal magnetic field, just like Earth does. She also helped show that Jupiter's moon Europa has an ocean under the ice. You can read more about her here:
https://en.wikipedia.org/...Margaret_G._Kivelson