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Astronomy and Astrophysics

Astronomy is the scientific study of celestial objects. Astronomers explore and strive to understand the universe beyond the earth. The introductory level astronomy courses provide a non-technical overview of the scientific approach to questions and our current understanding. At the more advanced level a quantitative physical understanding of astrophysical systems is developed.



  • Astronomy and Astrophysics (major and minor options)
  • Astronomy and Physics (specialist)
  • Planetary Science (specialist)


First-Year Courses

  • AST 101H1 - The Sun and Its Neighbours
  • AST 121H1 - Origin and Evolution of the Universe


Advice for First Year

The required first-year courses for the astronomy and physics specialist program are MAT 137Y1 – Calculus!, either of two algebra courses (MAT 223H1 or MAT 240H1) and PHY 151H1 and PHY 152H1 – Foundations of Physics (two halfcourses). For the astronomy and astrophysics program, students must take either of two calculus courses (MAT 135Y1 – Calculus I or MAT 137Y1), and either sets of the two physics half- courses PHY 131H1 and PHY 132H1 - Introduction to Physics, or PHY 151H1 or PHY 152H1.


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