Research specialization
Variable stars; Astronomy education and outreach.

My primary research interest is variable stars. For example, monitoring changes in the periods of highly variable SX Phoenicius stars over several years improves our understanding of stellar evolution. As the coordinator of the York University Observatory, I promote the use of our telescopes for research, education, and outreach, the last including small-group tours and on-line public viewing. Especially, I enlist undergraduate students at York to use the telescopes of the York University Observatory to participate in the monitoring of variable stars, near-Earth asteroids, and eclipsing binary stars. I am regularly called upon by the media for interviews regarding current topics in space and astronomy.