The phrase "a vast circle of" is correct and usable in written English.
It can be used to describe a large group or network of people, ideas, or things that are interconnected or related in some way.
Example: "The organization has established a vast circle of supporters who are dedicated to its mission."
Alternatives: "a wide network of" or "a large community of".
Blessed with a vast circle of devoted friends, Marita loved life, was passionate about politics, literature and gardening.
In part as a result of graduate work in Germany and his years teaching in Britain, Dr. Birnbaum maintained a vast circle of friends and acquaintances that included German statesman Willy Brandt, "liberal lion" Edward M. Kennedy, philosophers Isaiah Berlin and Iris Murdoch, and fellow journalists Irving Kristol and Norman Podhoretz.
Thanks to a vast circle of winds known as the Hadley Cell, this area of the globe is both hot and dry.
Then a sea of signs, enough to complete a vast circle around the entire Capitol grounds.
In New York, the loss has simply left a mournful hole in the vast circle of friends that Mr. Parrado had collected during his seven years in the city.
His vast circle of friends gave him an instant constituency to bear witness to his good deeds; the extraordinary nature of his death -- he is listed by the medical examiner's office as victim No. 1 -- gave him fame.
A legendary figure in 20th-century number theory was Paul Erdős (1913 96), a Hungarian genius known for his deep insights, his vast circle of collaborators, and his personal eccentricities.
She will be missed not only by her immediate family, but also her extended family and vast circle of friends.
Glazer, whose vast circle of friends includes such powerful men as Graydon Carter, editor of Vanity Fair (where Glazer and I once worked on a project together), and film producer Steve Bing, said Evans isn't based on anybody in particular; but he did have a story about how another friend, hotelier Andre Balazs, claimed to have inspired the character.
IT LOOKS like a planetary tattoo designed to be seen from space, a vast set of concentric circles inscribed in the skin of southern California's desert.
When she referred to the audience as "we" and "you," she was conjuring up not a coterie of the like-minded but a vast, contentious circle of friends and lovers, a utopian community that transcended time and geography.
