The planet found 9.5 astronomical units from the sun is Neptune.
1. An astronomical unit (AU) is a unit of length used in astronomy to measure distances within the solar system. 1 AU is the average distance from the Earth to the Sun, which is about 93 million miles or 150 million kilometers.
2. To determine which planet is located 9.5 astronomical units from the Sun, we need to understand the average distances of the planets from the Sun in astronomical units. For example, Mercury is about 0.39 AU from the Sun, Venus is around 0.72 AU, Earth is 1 AU, Mars is roughly 1.52 AU, Jupiter is about 5.2 AU, Saturn is around 9.58 AU, Uranus is approximately 19.22 AU, and Neptune is about 30.05 AU.
3. Comparing these distances, we find that Neptune is located at approximately 30.05 AU from the Sun, making it the planet that is around 9.5 astronomical units away.
Therefore, the correct answer is:
O Neptune
