Timothy SchmidtProfessor of Chemistry, UNSW SydneyProfessor Timothy Schmidt works in the School of Chemistry at UNSW Sydney where he is also Director of Research. He is a Chief Investigator in the ARC Centre of Excellence in Exciton Science. Why are auroras different colors? Auroras occur when charged solar particles bash into Earth's magnetic field and funnel toward the poles. The types of atoms these particles hit determines the color of light emitted.
