For many years the Dominion Observatory was best known to Canadians as the source of Canada 's official time signal .
In 1917 , the Dominion Astrophysical Observatory was opened in Victoria , B.C. and it supplanted the Dominion Observatory as Canada 's foremost astronomical observatory .
For many years the Dominion Observatory was best known to Canada as the source of Canada 's official time signal .
In 1917 , the Dominion Astrophysical Observatory was opened in Victoria , B.C. and it supplanted the Dominion Observatory as Canada 's foremost astronomical observatory .