 The Toronto Magnetic and Meteorological Observatory is a historical observatory located on the grounds of the University of Toronto , in Toronto , Ontario , Canada . The original building was constructed in 1840 as part of a worldwide research project run by Edward Sabine to determine the cause of fluctuations in magnetic declination . Measurements from the Toronto site demonstrated that sunspots were responsible for this effect on Earth 's magnetic field . When this project concluded in 1853 , the observatory was greatly expanded by the Canadian government and served as the country 's primary meteorological station and official timekeeper for over fifty years . The observatory is considered the birthplace of Canadian astronomy . 
 The Toronto Magnetic and Meteorological Observatory <a href='drop_aux' title='1'><mark>is</mark></a>a historical observatory located on the grounds of the University of Toronto , in Toronto , Ontario , Canada . The original building was constructed in 1840 as part of a worldwide research project run by Edward Sabine to determine the cause of fluctuations in magnetic declination . Measurements from the Toronto site demonstrated that sunspots <a href='uninflect' title='2'><mark>were</mark></a> responsible for this effect on Earth <a href='null_genetive' title='3'><mark>'s</mark></a>magnetic field . When this project concluded in 1853 , the observatory was greatly expanded by the Canadian government and served as the country <a href='null_genetive' title='4'><mark>'s</mark></a>primary meteorological station and official timekeeper for over fifty years . The observatory is considered the birthplace of Canadian astronomy . 
The Toronto Magnetic and Meteorological Observatory a historical observatory located on the grounds of the University of Toronto , in Toronto , Ontario , Canada . da original building was constructed in 1840 as part of a worldwide research project run by Edward Sabine to determine the cause of fluctuations in magnetic declination . Measurements from tdaToronto site demonstrated dat sunspots was responsible fir dis effect on Earth  magnetic field . When this project concluded in 1853 , thdabservatory was greatly expanded by thedanadian government and served as the country  primary meteorological station and official timekeeper fa over fifty years . The observatory is considered the birthplace of Canadian astronomy .