Like the great navigators who first sailed around the Earth, to gather information about its size and curvature of its surface, new observations have been made by astronomers that show with startling directness the large-scale geometry of the universe.

• ALike the great navigators who first sailed around the Earth, to gather information about its size and curvature of its surface, new observations have been made by astronomers  
• BLike the great navigators who first sailed around the Earth for gathering information about its size and also the curvature of its surface, new observations have been made by astronomers  
• CSimilar to the great navigators who first sailed around the Earth, where they gathered information about its size and the curvature of its surface, astronomers have made new observations  
• DLike the great navigators who first sailed around the Earth gathering information about its size and the curvature of its surface, astronomers have made new observations  
• EJust as with the great navigators who first sailed around the Earth, gathering information about its size and curvature of the surface, astronomers have made new observations