Canada-wide Astronomy Buy & Sell Canadian Space Guide Durham Region Astronomical Association Hamilton Amateur Astronomers North Shore Erie Amateur Astronomers Peterborough Astronomical Association Royal Astronomical Society of Canada SkyNews Magazine South Simcoe Amateur Astronomers University of Toronto Astronomy Department York University Astronomy Physics Club
AAVSO IOTA The Planetary Society Sky Publishing
Don Machholz's Comet Comments Centre for Backyard Astrophysics Star Hill Inn The ATM Page
Orbital Elements (Comets)
AAVSO IOTA The Planetary Society Sky Publishing Don Machholz's Comet Comments Centre for Backyard Astrophysics Star Hill Inn The ATM Page
Orbital Elements (Comets)
