The future of the Dominion Observatory is bleak.

An Ottawa politician suggested that the property will be a casualty of the Civic Hospital's relocation to the Farm:
"Counc. Riley Brockington, who represents the newly leased land, has been trying to lock in lease conditions that would preserve many buildings on the property as possible, such as the Dominion Observatory."(Reevely:Feds say they'll pay $11.8 million to clean up new Civic site"- Ottawa Citizen, February 25, 2018.)
However, the Civic has indicated that the campus will interfere with their construction plans and they do not want irregularly shaped parcels of land. The Sir John Carling site was rated as "poor in that there are multiple heritage considerations, including intrusion into the present boundary of the Central Experimental Farm National Historic Site and proximity to the Rideau Canal UNESCO World Heritage Site and several federal heritage buildings. The West Annex may also require heritage consideration." (NCC Federal Site Review for the New Civic Campus of the Ottawa Hospital." Page 68/256, November 2016.)
The National Capital commission report suggested that heritage buildings could be moved to another location or demolished. As if the Dominion Observatory could ever be relocated.

The Dominion Astrophysical Observatory. (Wikipedia)

The South Azimuth Building has no future because the City of Ottawa is widening the road.The North Azimuth Building has already been destroyed..(Photo from Flickr)

In 1971 Arthur Covington wrote a letter to Prime Minister Pierre Trudeau asking the PM to save the property.During the mid-1990's plans were made to flatten the Dominion Observatory, the Booth Barn and many other landmarks.Heritage Ottawa and the Province of Ontario prevented that debacle.
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The Royal Observatory in Greenwich, England was designed by Sir Christopher Wren and is a UNESCO World Heritage Site.He also designed:
St. Paul's Cathedral
Hampton Court Palace
Kensington Palace
The Monument to the Great Fire of London
Hampton Court Palace
Marlborough House
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David Ewart-Dominion architect.

Canadia-Located in Niagara Falls, Ontario from 1967 until the early 1970's, had models of the most important built landmarks in Canada.

A replica of the Welland Canal.

The Observatory is part of this collage.