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.
What Caused the Tilt of the Earth? Most scientists believe that the Earthâs spin axis was perpendicular (had no tilt) to the orbital plane when it formed. How Earth came to be tilted off of perpendicular has been the subject of some debate; however, since we visited the Moon there is a new theory that might offer a reasonable explanation for our unique tilt.