text: He begins to elaberate more by given facts about how the two planets are alike. "Venus is the closet planet to Earth in terms of density and size", the author says. Venus is sometimes the closet planet to Earth, thus being the reason why humans have sent numerous spacecraft to land on, as the author calls it, a "cloud-draped world". Every mission to Venus, hasn't in the lamest terms, been successful. The spacecrafts sent there have only lasted for a couple of hours, and this is why every mission has been unmanned.