Simplify the following text for a Grade 11 native English-speaking person.
Original: Like Uranus , the source of this heating is unknown , but the differences are larger : Neptune is the farthest planet from the Sun , yet its internal energy is strong enough to create the fastest winds seen in the Solar System .
Simplified: Neptune is the farthest planet from the Sun , yet its internal energy is sufficient to drive the fastest planetary winds seen in the Solar System .