1 Thorium fuels can breed fissile uranium-233 to be used in various kinds of nuclear reactors. 2  Molten salt reactors are well suited to thorium fuel, as normal fuel fabrication is avoided.
Since Pluto has a much higher axial tilt of roughly 119.5 degrees, it has much larger arctic and antarctic circles, each stretching from roughly 29.5 degrees latitude to their respective poles. This means that at the peak of Plutoâs summer the area receiving the most direct sunlight is actually in the arctic circle.
Pluto lies in the distant Kuiper Belt, with similar rock-and-ice bodies. These pieces were left over at the beginning of the solar system. The Kuiper Belt hosts not only dwarf planets and asteroids, but also comets; scientists think that if Pluto traveled close enough to the sun, it would develop a tail.