Measurements of density and composition imply that Venus originally formed out of basically the same stuff as earth that presumably included much more water than the tiny trace we find blowing in the thick air today.

密度和构成的测量表明刚开始时形成金星的物质和地球是同样的，比那些我们如今发现在厚大气下面流淌的小小的痕迹要包含更多的水。