Where a stipulator had no interest in the performance for the third party (and provided the stipulatio alteri was phrased correctly), the promisor first had to confirm the promise by oath in order to render the natural obligation into a civil obligation.
How far away is Venus from Earth? The planet Venus is the second planet from the sun and Earth is the third. Venus is the closest planet to Earth. It is about 25 million miles (40 million kilometers) away from Earth.
The are varying numbers for the Venus distance from Earth. Each number depends on the relative position of each planet in its elliptical orbit. The point when the planets are at their closest approach to each other is called opposition. The distance between the planets can even vary at different oppositions. The closest possible opposition distance between Earth and Venus is 38 million kilometers. This is the closest that any planet comes to Earth. The farthest that Venus ever gets from Earth is 261 million km. The means that the Venus distance from Earth can vary by an incredible 223 million km. While that seems like an amazing distance, it is nothing compared to the numbers attributed to other planets. Try to imagine how far it is between Earth and Neptune. Here is a link that tells you how to figure those distances out.