Student or Learner
Hi... please read the below sentence.
Then came the simple announcement that shattered forever man's ancient isolation on earth: "The world's first spaceship Vostok [East], with a man on board, has been launched on April 12 in the Soviet Union on a round-the-world orbit.
I have two questions. First, is 'announcement' the subject?
Second, What does "on a round-the-world" mean?