Aranel is an imaginary world described in the History Channel exobiology documentary "Alien Faces". This small world orbits around a red dwarf star.
Aranel is a tidally-locked world, which means that half of the planet is permanently facing the star, and thus is very bright and hot. The other half is in constant darkness and is much colder. Between the two, there's the "twilight area", where temperatures are pleasant and liquid water bodies can be found.