This planet's magnetopause is located at about 18 times its planetary radius and its magnetotail trails behind it in a unique corkscrew motion.  
One hypothesis for this body's low thermal flux proposes that a supermassive impactor made it lose most of its primordial heat.  One layer of this body may be characterized by "diamond-bergs" floating on an ocean of liquid carbon.  This planet's magnetopause is located at about 18 times its planetary radius and its magnetotail trails behind it in a unique corkscrew motion.  The largest satellite of this planet is (*) Titania, but its collective satellite system is the least massive of the group of planets it is a member of.  This planet completes one revolution around the Sun about every 84 years and relative to the Sun's orbital plane, its axis is tilted at 98 degrees.  For 10 points, name this seventh planet from the Sun, a gas giant that appears to spin on its side as it orbits the Sun.
One hypothesis for this body's low thermal flux proposes that a supermassive impactor made it lose most of its primordial heat.  
Uranus