Theoretical astrophysics, particularly astrophysical fluid dynamics and physics and chemistry of the interstellar medium.  Real-world applications include accretion discs, star and planet formation, and the Galactic Centre.

Mark Wardle is an astrophysicist in the Department of Physics & Astronomy. He holds honours degrees in mathematics and physics from the University of Auckland and a PhD in astrophysics from Princeton University. After completing his doctorate, Mark held positions at the University of Chicago, Northwestern University and the University of Rochester. He returned to the Southern Hemisphere, spending several years at the University of Sydney before moving to Macquarie. Mark has extensive experience teaching physics and astronomy courses at first year through to PhD level and conducts research on the formation of stars and planetary systems, the massive black hole at the centre of the Galaxy, and physical and chemical processes occurring in interstellar space. Cool.