Professor Penny Sackett BS MS PhD is a physicist by training, an astronomer by profession and an educator by inclination. She is a member of several international astronomical societies and the Association for Women in Science. Her career also includes journalism and policy advice on several national science advisory panels. She was appointed Chief Scientist for Australia in November 2008.
Penny's next big question is "Can humanity mobilise the talent and resources needed to find and implement sustainable solutions to climate change?" (12.5Mb).
For more about this project see The next big question.